subject:(Loaded Antennas)

University of Oklahoma

1. Winniford, Paul. Reconfigurable and multiband antennas with resonant and reactive loads.

Degree: PhD, 2020, University of Oklahoma

► Reactive and resonant loads have been used from the very beginning of antenna design to improve impedance matching, bandwidth, and current distributions on antennas, and… (more)

Subjects/Keywords: Antennas; Reconfigurable Antennas; Multifrequency Antennas; Loaded Antennas

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APA (6^th Edition):

Winniford, P. (2020). Reconfigurable and multiband antennas with resonant and reactive loads. (Doctoral Dissertation). University of Oklahoma. Retrieved from http://hdl.handle.net/11244/326683

Chicago Manual of Style (16^th Edition):

Winniford, Paul. “Reconfigurable and multiband antennas with resonant and reactive loads.” 2020. Doctoral Dissertation, University of Oklahoma. Accessed February 27, 2021. http://hdl.handle.net/11244/326683.

MLA Handbook (7^th Edition):

Winniford, Paul. “Reconfigurable and multiband antennas with resonant and reactive loads.” 2020. Web. 27 Feb 2021.

Vancouver:

Winniford P. Reconfigurable and multiband antennas with resonant and reactive loads. [Internet] [Doctoral dissertation]. University of Oklahoma; 2020. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/11244/326683.

Council of Science Editors:

Winniford P. Reconfigurable and multiband antennas with resonant and reactive loads. [Doctoral Dissertation]. University of Oklahoma; 2020. Available from: http://hdl.handle.net/11244/326683

Georgia Tech

2. Bolton, Timothy. Optimal design of electrically-small loop antenna including surrounding medium effects.

Degree: MS, Electrical and Computer Engineering, 2016, Georgia Tech

URL: http://hdl.handle.net/1853/54836

► Electrically-small loop antennas are a complex topic, with many design concepts to consider, including: effective magnetic core permeability, antenna impedance, antenna radiation, surrounding medium effects,… (more)

Subjects/Keywords: Dielectrics and electrical insulation; Ferrites; Geometry; Impedance; Loaded antennas; Magnetic cores; Permeability; Receiving antennas; Shape

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APA (6^th Edition):

Bolton, T. (2016). Optimal design of electrically-small loop antenna including surrounding medium effects. (Masters Thesis). Georgia Tech. Retrieved from http://hdl.handle.net/1853/54836

Chicago Manual of Style (16^th Edition):

Bolton, Timothy. “Optimal design of electrically-small loop antenna including surrounding medium effects.” 2016. Masters Thesis, Georgia Tech. Accessed February 27, 2021. http://hdl.handle.net/1853/54836.

MLA Handbook (7^th Edition):

Bolton, Timothy. “Optimal design of electrically-small loop antenna including surrounding medium effects.” 2016. Web. 27 Feb 2021.

Vancouver:

Bolton T. Optimal design of electrically-small loop antenna including surrounding medium effects. [Internet] [Masters thesis]. Georgia Tech; 2016. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/1853/54836.

Council of Science Editors:

Bolton T. Optimal design of electrically-small loop antenna including surrounding medium effects. [Masters Thesis]. Georgia Tech; 2016. Available from: http://hdl.handle.net/1853/54836

University of Adelaide

3. Zainarry, Siti Nailah Mastura. Recon gurable Antennas Based on Varactor-Loaded Stubs.

Degree: 2019, University of Adelaide

URL: http://hdl.handle.net/2440/124595

► The term “reconfigurable” is typically used for devices which exhibit some flexibility of functionalities and agility in their operation characteristics, with the aim of achieving… (more)

▼ The term “reconfigurable” is typically used for devices which exhibit some flexibility of functionalities and agility in their operation characteristics, with the aim of achieving high performance in various conditions. In antenna technology, the reconfiguration can be fulfilled through several techniques that provide an ability to modify the electrical current on the antenna’s structure, primarily to accomplish a physically realised new response. The main key to the reconfigurable antenna application is their potential to avoid the use of multiple antennas for multi-functionality, thus facilitating miniaturisation of the antenna system configuration. In this context, several novel reconfigurable antennas with a wide performance range are proposed in this thesis. Varactor-loaded stubs are used as tuning mechanism for these microwave antenna designs with improved performance throughout this thesis. Two types of electromagnetic structures are studied in this work, namely reconfigurable antennas and reconfigurable periodic structures, with these two main topics building the two main major parts of this thesis. In its first main part, the thesis proposes reconfigurable antenna designs with combined frequency and pattern reconfigurable characteristics. The main focus is first on the manipulation of near-resonant current distributions in a two-element array antenna as well as the optimisation of their feeding through T-junction power dividers. Each element has a controllable active component that allows the antenna to be tuned to different operating frequencies, while the concurrent adaption of the two elements is the basis of continuous beam scanning characteristics. Next, the thesis examines the exploitation of a single-element antenna structure based on the same operation principle. An optimisation procedure including a study of relevant design parameters is also presented. The core contribution for the two-element array and the single-element antenna is that they combine frequency-reconfigurability with effective beam scanning. The main difference between the two designs however is that they scan in the H-plane and the E-plane, respectively. In the second main part, the thesis focuses on a reconfigurable reflectarray antenna design. Potential applications of this advanced antenna design include the development of high gain antennas with various controllable reflection beam directions throughout a wide range of operation frequencies. The proposed reflectarray antenna unit cell is firstly proposed, together with an opimisation of the antenna characteristics in terms of reflection loss and phase range performance. It is further shown that the proposed antenna provides an excellent performance compared to the state-of-the-art. Performance measures include a near full phase tuning range of about 300 to 320 with a reflection loss of magnitude better than 3 dB within a fractional frequency range of operation of 18%. In contrast, most reflectarray antenna designs in the literature provide a limited phase range at a fixed… Advisors/Committee Members: Fumeaux, Christophe (advisor), Lim, Cheng Chew (advisor), School of Electrical and Electronic Engineering (school).

Subjects/Keywords: Reconfigurable antennas; Frequency-reconfigurable; Pattern-reconfigurable; Varactor-loaded stubs

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APA (6^th Edition):

Zainarry, S. N. M. (2019). Recon gurable Antennas Based on Varactor-Loaded Stubs. (Thesis). University of Adelaide. Retrieved from http://hdl.handle.net/2440/124595

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Zainarry, Siti Nailah Mastura. “Recon gurable Antennas Based on Varactor-Loaded Stubs.” 2019. Thesis, University of Adelaide. Accessed February 27, 2021. http://hdl.handle.net/2440/124595.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Zainarry, Siti Nailah Mastura. “Recon gurable Antennas Based on Varactor-Loaded Stubs.” 2019. Web. 27 Feb 2021.

Vancouver:

Zainarry SNM. Recon gurable Antennas Based on Varactor-Loaded Stubs. [Internet] [Thesis]. University of Adelaide; 2019. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/2440/124595.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Zainarry SNM. Recon gurable Antennas Based on Varactor-Loaded Stubs. [Thesis]. University of Adelaide; 2019. Available from: http://hdl.handle.net/2440/124595

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Bradford

4. Adnan, Shahid. Ultra-wideband antenna design for microwave imaging applications : design, optimisation and development of ultra-wideband antennas for microwave near-field sensing tools, and study the matching and radiation purity of these antennas within near field environment.

Degree: PhD, 2012, University of Bradford

URL: http://hdl.handle.net/10454/5750

► Near field imaging using microwave in medical applications has gain much attention recently as various researches show its high ability and accuracy in illuminating object… (more)

▼ Near field imaging using microwave in medical applications has gain much attention recently as various researches show its high ability and accuracy in illuminating object comparing to the well-known screening tools such as Magnetic Resonance Imaging (MRI), digital mammography, ultrasound etc. This has encourage and motivate scientists continue to exploit the potential of microwave imaging so that a better and more powerful sensing tools can be developed. This thesis documents the development of antenna design for microwave imaging application such as breast cancer detection. The application is similar to the concept of Ground Penetrating Radar (GPR) but operating at higher frequency band. In these systems a short pulse is transmitted from an antenna to the medium and the backscattered response is investigated for diagnose. In order to accommodate such a short pulse, a very wideband antenna with a minimal internal reflection is required. Printed monopole and planar metal plate antenna is implemented to achieve the necessary operating wide bandwidth. The development of new compact printed planar metal plate ultra wide bandwidth antenna is presented. A generalized parametric study is carried out using two well-known software packages to achieve optimum antenna performance. The Prototype antennas are tested and analysed experimentally, in which a reasonable agreement was achieved with the simulations. The antennas present an excellent relative wide bandwidth of 67% with acceptable range of power gain between 3.5 to 7 dBi. A new compact size air-dielectric microstrip patch-antenna designs proposed for breast cancer detection are presented. The antennas consist of a radiating patch mounted on two vertical plates, fed by coaxial cable. The antennas show a wide bandwidth that were verified by the simulations and also confirmed experimentally. The prototype antennas show excellent performance in terms the input impedance and radiation performance over the target range bandwidth from 4 GHz to 8 GHz. A mono-static model with a homogeneous dielectric box having similar properties to human tissue is used to study the interaction of the antenna with tissue. The numerical results in terms the matching required of new optimised antennas were promising. An experimental setup of sensor array for early-stage breast-cancer detection is developed. The arrangement of two elements separated by short distance that confined equivalent medium of breast tissues were modelled and implemented. The operation performances due to several orientations of the antennas locations were performed to determine the sensitivity limits with and without small size equivalent cancer cells model. In addition, a resistively loaded bow tie antenna, intended for applications in breast cancer detection, is adaptively modified through modelling and genetic optimisation is presented. The required wideband operating characteristic is achieved through manipulating the resistive loading of the antenna structure, the number of wires, and their angular separation within…

Subjects/Keywords: 621.382; Ultra-wideband (UWB); Ground Penetrating Radar (GPR); Microwave Imaging; Loaded Antennas; Antennas; Microstrip Patch Antennas; Near Fields; Genetic Algorithm (GA); Near field imaging; Breast-cancer detection

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APA (6^th Edition):

Adnan, S. (2012). Ultra-wideband antenna design for microwave imaging applications : design, optimisation and development of ultra-wideband antennas for microwave near-field sensing tools, and study the matching and radiation purity of these antennas within near field environment. (Doctoral Dissertation). University of Bradford. Retrieved from http://hdl.handle.net/10454/5750

Chicago Manual of Style (16^th Edition):

Adnan, Shahid. “Ultra-wideband antenna design for microwave imaging applications : design, optimisation and development of ultra-wideband antennas for microwave near-field sensing tools, and study the matching and radiation purity of these antennas within near field environment.” 2012. Doctoral Dissertation, University of Bradford. Accessed February 27, 2021. http://hdl.handle.net/10454/5750.

MLA Handbook (7^th Edition):

Adnan, Shahid. “Ultra-wideband antenna design for microwave imaging applications : design, optimisation and development of ultra-wideband antennas for microwave near-field sensing tools, and study the matching and radiation purity of these antennas within near field environment.” 2012. Web. 27 Feb 2021.

Vancouver:

Adnan S. Ultra-wideband antenna design for microwave imaging applications : design, optimisation and development of ultra-wideband antennas for microwave near-field sensing tools, and study the matching and radiation purity of these antennas within near field environment. [Internet] [Doctoral dissertation]. University of Bradford; 2012. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10454/5750.

Council of Science Editors:

Adnan S. Ultra-wideband antenna design for microwave imaging applications : design, optimisation and development of ultra-wideband antennas for microwave near-field sensing tools, and study the matching and radiation purity of these antennas within near field environment. [Doctoral Dissertation]. University of Bradford; 2012. Available from: http://hdl.handle.net/10454/5750

5. Ahdi Rezaeieh, Sasan. Wideband Microwave Imaging Systems for the Diagnosis of Fluid Accumulation in the Human Torso.

Degree: School of Information Technol and Elec Engineering, 2016, University of Queensland

URL: http://espace.library.uq.edu.au/view/UQ:396025

► According to the World Health Organization (WHO), cardiovascular diseases (CVDs) are the leading causes of death worldwide, with one third of deaths attributed to CVDs… (more)

▼ According to the World Health Organization (WHO), cardiovascular diseases (CVDs) are the leading causes of death worldwide, with one third of deaths attributed to CVDs in 2012. Pulmonary oedema and pleural effusion are the most apparent symptoms of many diseases categorized under CVDs such as heart failure and lung cancer, at which fluid (mainly with high water content) is accumulated in or around the lungs. Therefore, constant monitoring of fluid levels inside the lungs is one of the most efficient ways of early detection of CVDs. Chest X-Rays and computational tomography (CT)-scans are the most widely used devices for fluid detection; however, they suffer from lack of sensitivity and ionizing radiation, respectively, that makes them unsuitable for long term monitoring purposes. Currently, magnetic resonance imaging (MRI) is the most reliable device that can be utilized for fluid accumulation detection. However, considering the fact that more than 75% of the CVDs occur in countries with low or middle income, it is not widely available. Moreover, due to their bulky structures, the abovementioned devices lack the capability of being used in mobile emergency units such as ambulances or clinics at rural areas. To that end, this thesis is dedicated to design and fabrication of a low cost, portable and non-invasive device that can be used as an initial decision making tool for medical staff to pursue further investigations to define the exact cause of the oedema. First chapter of the thesis is allocated to introduction of the cardiovascular diseases and their effects on the dielectric properties of the tissues inside the lungs. A complete literature review on various alternative methods for replacing the conventional devices is performed. The obtained results by these systems and their advantages as well as their limitations are discussed. Microwave imaging technique is then presented in chapter two as a robust method which can both provide information about the presence and location of the accumulated fluid. This is specifically of great importance for cases where biopsy is required to remove or take sample of the accumulated fluid for saving the life of the patient. Chapter two is also allocated to the introduction of microwave-based medical diagnostic and monitoring systems for different applications such as breast cancer detection and brain imaging. A prospect of the possible realizable systems is investigated and existing scanning approaches are discussed. The main contributions of the thesis that are the design of several complete platforms, design of novel and unidirectional microwave sensors (antennas), promotion of novel scanning and detection methods are clarified in these chapters. In chapter three, firstly the optimum operating frequency for torso imaging is defined. By applying a circuit model that models different layers of torso as circuit elements, it is shown that a wide operating bandwidth at lower ultra-high frequency (UHF) band provides a reasonable compensation between the resolution of the obtained…

Subjects/Keywords: Torso scanner system; fluid accumulation detection; pleural effusion detection; pulmonary oedema detection; heart failure detection; loop-dipole antennas; slot loaded antennas; wideband antennas; unidirectional antennas; three dimensional (3-D) antennas; 0903 Biomedical Engineering; 0906 Electrical and Electronic Engineering; 100501 Antennas and Propagation

11 more images…

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APA (6^th Edition):

Ahdi Rezaeieh, S. (2016). Wideband Microwave Imaging Systems for the Diagnosis of Fluid Accumulation in the Human Torso. (Thesis). University of Queensland. Retrieved from http://espace.library.uq.edu.au/view/UQ:396025

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ahdi Rezaeieh, Sasan. “Wideband Microwave Imaging Systems for the Diagnosis of Fluid Accumulation in the Human Torso.” 2016. Thesis, University of Queensland. Accessed February 27, 2021. http://espace.library.uq.edu.au/view/UQ:396025.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ahdi Rezaeieh, Sasan. “Wideband Microwave Imaging Systems for the Diagnosis of Fluid Accumulation in the Human Torso.” 2016. Web. 27 Feb 2021.

Vancouver:

Ahdi Rezaeieh S. Wideband Microwave Imaging Systems for the Diagnosis of Fluid Accumulation in the Human Torso. [Internet] [Thesis]. University of Queensland; 2016. [cited 2021 Feb 27]. Available from: http://espace.library.uq.edu.au/view/UQ:396025.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ahdi Rezaeieh S. Wideband Microwave Imaging Systems for the Diagnosis of Fluid Accumulation in the Human Torso. [Thesis]. University of Queensland; 2016. Available from: http://espace.library.uq.edu.au/view/UQ:396025

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

The Ohio State University

6. Elghannai, Ezdeen Ahmed. NOVEL METHOD TO CONTROL ANTENNA CURRENTS BASED ON THEORY OF CHARACTERISTIC MODES.

Degree: PhD, Electrical and Computer Engineering, 2016, The Ohio State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1471871173

► Characteristic Mode Theory is one of the very few numerical methodsthat provide a great deal of physical insight because it allows us to determine thenatural… (more)

▼ Characteristic Mode Theory is one of the very few numerical methodsthat provide a great deal of physical insight because it allows us to determine thenatural modes of the radiating structure. The key feature of these modes is that thetotal induced antenna current, input impedance/admittance and radiation patterncan be expressed as a linear weighted combination of individual modes. Using thisdecomposition method, it is possible to study the behavior of the individual modes,understand them and therefore control the antennas behavior; in other words, controlthe currents induced on the antenna structure.This dissertation advances the topic of antenna design by carefully controlling theantenna currents over the desired frequency band to achieve the desired performancespecifications for a set of constraints. Here, a systematic method based on the Theory of Characteristic Modes (CM) and lumped reactive loading to achieve the goalof current control is developed. The lumped reactive loads are determined based onthe desired behavior of the antenna currents. This technique can also be used toimpedance match the antenna to the source/generator connected to it. The technique is much more general than the traditional impedance matching. Generally, thereactive loads that properly control the currents exhibit a combination of Foster andnon-Foster behavior. The former can be implemented with lumped passive reactive components, while the latter can be implemented with lumped non-Foster circuits(NFC).The concept of current control is applied to design antennas with a wide band(impedance/pattern) behavior using reactive loads. We successfully applied this noveltechnique to design multi band and wide band antennas for wireless applications. Thetechnique was developed to match the antenna to resistive and/or complex sourceimpedance and control the radiation pattern at these frequency bands, considering size and volume constraints. A wide band patch antenna was achieved usingthe developed technique. In addition, the technique was applied to multi band wireless Universal Serial Bus (USB) dongle antenna that serves for WLAN IEEE 802.11a/b/g/n band applications and Radio Frequency Identification (RFID) tag antennafor 915MHz band applications with superior performance compared to previous published results.This dissertation also discusses the total Q of an antenna from the CM standpoint.A new expression as well as additional physical information about each mode'sindividual contribution to the total antenna Q are provided.Finally, the theory is used to an analyze the antenna in both radiation and/orscattering modes. In the antenna scattering mode, the field scattered by an antennacontains a component that is the short circuit scattered field, and a second componentthat is proportional to the radiation field. In this dissertation, an analytical studyof this phenomena from the CM standpoint is performed aiming to shed some lighton antenna scattering phenomenon where additional physical insight is obtained andthus used to reach desire results. Advisors/Committee Members: Rojas, Roberto (Advisor).

Subjects/Keywords: Engineering; Electrical Engineering; Electromagnetics; Antennas; Loaded antennas; Characteristic modes theory; Electrically small antennas; wide band antennas; reactive loading; Antenna scattering; Characteristic modes; Radar cross section; Antenna Scattering; Quality factor of Antennas

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APA (6^th Edition):

Elghannai, E. A. (2016). NOVEL METHOD TO CONTROL ANTENNA CURRENTS BASED ON THEORY OF CHARACTERISTIC MODES. (Doctoral Dissertation). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1471871173

Chicago Manual of Style (16^th Edition):

Elghannai, Ezdeen Ahmed. “NOVEL METHOD TO CONTROL ANTENNA CURRENTS BASED ON THEORY OF CHARACTERISTIC MODES.” 2016. Doctoral Dissertation, The Ohio State University. Accessed February 27, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=osu1471871173.

MLA Handbook (7^th Edition):

Elghannai, Ezdeen Ahmed. “NOVEL METHOD TO CONTROL ANTENNA CURRENTS BASED ON THEORY OF CHARACTERISTIC MODES.” 2016. Web. 27 Feb 2021.

Vancouver:

Elghannai EA. NOVEL METHOD TO CONTROL ANTENNA CURRENTS BASED ON THEORY OF CHARACTERISTIC MODES. [Internet] [Doctoral dissertation]. The Ohio State University; 2016. [cited 2021 Feb 27]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1471871173.

Council of Science Editors:

Elghannai EA. NOVEL METHOD TO CONTROL ANTENNA CURRENTS BASED ON THEORY OF CHARACTERISTIC MODES. [Doctoral Dissertation]. The Ohio State University; 2016. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1471871173

Delft University of Technology

7. Shenario Ezhil Valavan, A. Dual-Band Planar Wide-Angle Scanning Phased Arrays.

Degree: 2014, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:0ae6e349-07c4-4ca6-9393-71f1dba14db8 ; urn:NBN:nl:ui:24-uuid:0ae6e349-07c4-4ca6-9393-71f1dba14db8 ; urn:NBN:nl:ui:24-uuid:0ae6e349-07c4-4ca6-9393-71f1dba14db8 ; http://resolver.tudelft.nl/uuid:0ae6e349-07c4-4ca6-9393-71f1dba14db8

Subjects/Keywords: phased arrays; multifrequency antennas; satcomm antennas; planar antennas; patch antennas; mutual coupling; dielectric contrast; comb-slot-loaded antenna

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APA (6^th Edition):

Shenario Ezhil Valavan, A. (2014). Dual-Band Planar Wide-Angle Scanning Phased Arrays. (Doctoral Dissertation). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:0ae6e349-07c4-4ca6-9393-71f1dba14db8 ; urn:NBN:nl:ui:24-uuid:0ae6e349-07c4-4ca6-9393-71f1dba14db8 ; urn:NBN:nl:ui:24-uuid:0ae6e349-07c4-4ca6-9393-71f1dba14db8 ; http://resolver.tudelft.nl/uuid:0ae6e349-07c4-4ca6-9393-71f1dba14db8

Chicago Manual of Style (16^th Edition):

Shenario Ezhil Valavan, A. “Dual-Band Planar Wide-Angle Scanning Phased Arrays.” 2014. Doctoral Dissertation, Delft University of Technology. Accessed February 27, 2021. http://resolver.tudelft.nl/uuid:0ae6e349-07c4-4ca6-9393-71f1dba14db8 ; urn:NBN:nl:ui:24-uuid:0ae6e349-07c4-4ca6-9393-71f1dba14db8 ; urn:NBN:nl:ui:24-uuid:0ae6e349-07c4-4ca6-9393-71f1dba14db8 ; http://resolver.tudelft.nl/uuid:0ae6e349-07c4-4ca6-9393-71f1dba14db8.

MLA Handbook (7^th Edition):

Shenario Ezhil Valavan, A. “Dual-Band Planar Wide-Angle Scanning Phased Arrays.” 2014. Web. 27 Feb 2021.

Vancouver:

Shenario Ezhil Valavan A. Dual-Band Planar Wide-Angle Scanning Phased Arrays. [Internet] [Doctoral dissertation]. Delft University of Technology; 2014. [cited 2021 Feb 27]. Available from: http://resolver.tudelft.nl/uuid:0ae6e349-07c4-4ca6-9393-71f1dba14db8 ; urn:NBN:nl:ui:24-uuid:0ae6e349-07c4-4ca6-9393-71f1dba14db8 ; urn:NBN:nl:ui:24-uuid:0ae6e349-07c4-4ca6-9393-71f1dba14db8 ; http://resolver.tudelft.nl/uuid:0ae6e349-07c4-4ca6-9393-71f1dba14db8.

Council of Science Editors:

Shenario Ezhil Valavan A. Dual-Band Planar Wide-Angle Scanning Phased Arrays. [Doctoral Dissertation]. Delft University of Technology; 2014. Available from: http://resolver.tudelft.nl/uuid:0ae6e349-07c4-4ca6-9393-71f1dba14db8 ; urn:NBN:nl:ui:24-uuid:0ae6e349-07c4-4ca6-9393-71f1dba14db8 ; urn:NBN:nl:ui:24-uuid:0ae6e349-07c4-4ca6-9393-71f1dba14db8 ; http://resolver.tudelft.nl/uuid:0ae6e349-07c4-4ca6-9393-71f1dba14db8

8. Hodge II, John Adams. Analysis of Periodic and Random Capacitively-Loaded Loop (CLL) Metamaterial Structures for Antenna Enhancement Applications.

Degree: MS, Electrical Engineering, 2014, Virginia Tech

URL: http://hdl.handle.net/10919/49298

► After being theorized by Veselago in 1967, recent developments in metamaterials over the last two decades have allowed scientists and researchers to physically demonstrate that… (more)

Subjects/Keywords: Metamaterials; Antennas; Random; Capacitively-Loaded Loops (CLL); Negative Refraction; Loaded Dipole

…84 Figure 4.27: S11 Return Loss of Planar CLL-Loaded Dipole Antenna… …85 Figure 4.29: 4-fin CLL-Loaded Dipole Antenna… …87 Figure 4.30: S11 Return Loss for 4-fin CLL-Loaded Dipole Antenna… …87 Figure 4.31: Realized Gain Pattern for 4-fin CLL-Loaded Dipole Antenna; Max Realized… …87 Figure 4.32: 8-fin CLL-Loaded Dipole Antenna…

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APA (6^th Edition):

Hodge II, J. A. (2014). Analysis of Periodic and Random Capacitively-Loaded Loop (CLL) Metamaterial Structures for Antenna Enhancement Applications. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/49298

Chicago Manual of Style (16^th Edition):

Hodge II, John Adams. “Analysis of Periodic and Random Capacitively-Loaded Loop (CLL) Metamaterial Structures for Antenna Enhancement Applications.” 2014. Masters Thesis, Virginia Tech. Accessed February 27, 2021. http://hdl.handle.net/10919/49298.

MLA Handbook (7^th Edition):

Hodge II, John Adams. “Analysis of Periodic and Random Capacitively-Loaded Loop (CLL) Metamaterial Structures for Antenna Enhancement Applications.” 2014. Web. 27 Feb 2021.

Vancouver:

Hodge II JA. Analysis of Periodic and Random Capacitively-Loaded Loop (CLL) Metamaterial Structures for Antenna Enhancement Applications. [Internet] [Masters thesis]. Virginia Tech; 2014. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/10919/49298.

Council of Science Editors:

Hodge II JA. Analysis of Periodic and Random Capacitively-Loaded Loop (CLL) Metamaterial Structures for Antenna Enhancement Applications. [Masters Thesis]. Virginia Tech; 2014. Available from: http://hdl.handle.net/10919/49298

NSYSU

9. Sze, Jia-Yi. BANDWIDTH-ENHANCEMENT DESIGNS OF SLOT-LOADED RECTANGULAR MICROSTRIP ANTENNAS.

Degree: PhD, Electrical Engineering, 2001, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0111101-150516

► The bandwidth-enhancement characteristics of slot-loaded rectangular microstrip antennas constructed on a thin microwave substrate have been investigated in this dissertation. The primary design process about… (more)

Subjects/Keywords: BROADBAND OPERATION; BANDWIDTH ENHANCEMENT; RECTANGULAR MICROSTRIP ANTENNAS; DUAL-FREQUENCY OPERATION; MICROSTRIP ANTENNAS; SLOT-LOADED PATCH

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APA (6^th Edition):

Sze, J. (2001). BANDWIDTH-ENHANCEMENT DESIGNS OF SLOT-LOADED RECTANGULAR MICROSTRIP ANTENNAS. (Doctoral Dissertation). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0111101-150516

Chicago Manual of Style (16^th Edition):

Sze, Jia-Yi. “BANDWIDTH-ENHANCEMENT DESIGNS OF SLOT-LOADED RECTANGULAR MICROSTRIP ANTENNAS.” 2001. Doctoral Dissertation, NSYSU. Accessed February 27, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0111101-150516.

MLA Handbook (7^th Edition):

Sze, Jia-Yi. “BANDWIDTH-ENHANCEMENT DESIGNS OF SLOT-LOADED RECTANGULAR MICROSTRIP ANTENNAS.” 2001. Web. 27 Feb 2021.

Vancouver:

Sze J. BANDWIDTH-ENHANCEMENT DESIGNS OF SLOT-LOADED RECTANGULAR MICROSTRIP ANTENNAS. [Internet] [Doctoral dissertation]. NSYSU; 2001. [cited 2021 Feb 27]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0111101-150516.

Council of Science Editors:

Sze J. BANDWIDTH-ENHANCEMENT DESIGNS OF SLOT-LOADED RECTANGULAR MICROSTRIP ANTENNAS. [Doctoral Dissertation]. NSYSU; 2001. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0111101-150516

10. Van Niekerk, Carlo. Analysis and design of compact low profile antennas for fixed volume applications.

Degree: PhD, 1200, 2013, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/44284

► In this document we have accomplished a number of tasks that bring value to the field. A circuit analysis was performed on a transmission line… (more)

▼ In this document we have accomplished a number of tasks that bring value to the field. A circuit analysis was performed on a transmission line based metamaterial antenna (in particular, the Infinite Wavelength Resonant Antenna or IWRA). It was discovered that the antenna works in similar manner to traditional coupled transmission lines. In fact, further investigation using characteristic mode theory showed that the IWRA could be thought of simply as two closely coupled Planar Inverted-F Antennas (PIFAs) that are proximity-couple fed. The concept of a Dual Reactively Loaded Monopole (DRLM) antenna is introduced, an antenna that features capacitive and inductive loading components. This new design allows for miniaturized performance with the benefit of tunability. The implementation of the DRLM antenna where the inductive loading is achieved by a lumped inductor as opposed to the conventional distributed copper strip shows relatively good performance when compared to the fundamental limit. This study demonstrates the viability of inductive loading by lumped element for radiating structures. The optimum position for the lumped inductor is determined by experimental means. The DRLM antenna with reduced height profile is analyzed, and it is determined that the antenna architecture is not well suited to extreme low profile applications (e.g., short-fat topology). Finally, a Stacked DRLM antenna is designed for the purpose of achieving wider impedance bandwidth. The final design has a bandwidth more than double the original single mode DRLM antenna, though now the tunability is limited. All antennas discussed are compared to the theoretical limits for antenna performance, and specific antenna structures are evaluated against Gustafsson's limit for the appropriate volume that best describes the antenna geometry. This presents a more realistic performance comparison than the spherical volume counterpart, Chu's limit. Advisors/Committee Members: Bernhard, Jennifer T. (advisor), Bernhard, Jennifer T. (Committee Chair), Cangellaris, Andreas C. (committee member), Franke, Steven J. (committee member), Schutt-Ainé, José E. (committee member).

Subjects/Keywords: Electrically small antennas; Planar Inverted-F Antenna (PIFA); Metamaterials; Gustafsson's limit; Top-loaded Monopole

…transmission medium to the unguided (free space) propagating medium. Many antennas used in… …wireless applications are derived from microstrip antennas, also commonly known as “patch… …antennas.” Patch antennas have many attractive attributes, namely that they are low-profile… …These antennas are, however, notoriously narrow band due to their resonant operation. 1 Due… …complicated multifunction antenna or numerous antennas carefully distributed in the package…

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Van Niekerk, C. (2013). Analysis and design of compact low profile antennas for fixed volume applications. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/44284

Chicago Manual of Style (16^th Edition):

Van Niekerk, Carlo. “Analysis and design of compact low profile antennas for fixed volume applications.” 2013. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed February 27, 2021. http://hdl.handle.net/2142/44284.

MLA Handbook (7^th Edition):

Van Niekerk, Carlo. “Analysis and design of compact low profile antennas for fixed volume applications.” 2013. Web. 27 Feb 2021.

Vancouver:

Van Niekerk C. Analysis and design of compact low profile antennas for fixed volume applications. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2013. [cited 2021 Feb 27]. Available from: http://hdl.handle.net/2142/44284.

Council of Science Editors:

Van Niekerk C. Analysis and design of compact low profile antennas for fixed volume applications. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2013. Available from: http://hdl.handle.net/2142/44284

11. Manju,Paulson. DEVELOPMENT AND ANALYSIS OF DUAL FREQUENCY MICROSTRIP ANTENNAS.

Degree: Elecctronics, 2002, Cochin University of Science and Technology

URL: http://dyuthi.cusat.ac.in/purl/2118

Subjects/Keywords: Mlcrostrlp Antennas; Radiation Fields; Mlcrostrlp Patch Antennas; Mlcrostrip Traveling Wave Antennas; Mlcrostrip Slot Antennas; Broadband microstrip Antenna; Excitation Techniques; Resonant frequency; IE3D Simulation; Radiation Pattern; Frequency ratio tuning; Polarization diversity; Slot loaded arrow shaped microstrip antenna; Dual port shaped antenna

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Manju,Paulson. (2002). DEVELOPMENT AND ANALYSIS OF DUAL FREQUENCY MICROSTRIP ANTENNAS. (Thesis). Cochin University of Science and Technology. Retrieved from http://dyuthi.cusat.ac.in/purl/2118

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Manju,Paulson. “DEVELOPMENT AND ANALYSIS OF DUAL FREQUENCY MICROSTRIP ANTENNAS.” 2002. Thesis, Cochin University of Science and Technology. Accessed February 27, 2021. http://dyuthi.cusat.ac.in/purl/2118.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Manju,Paulson. “DEVELOPMENT AND ANALYSIS OF DUAL FREQUENCY MICROSTRIP ANTENNAS.” 2002. Web. 27 Feb 2021.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Vancouver:

Manju,Paulson. DEVELOPMENT AND ANALYSIS OF DUAL FREQUENCY MICROSTRIP ANTENNAS. [Internet] [Thesis]. Cochin University of Science and Technology; 2002. [cited 2021 Feb 27]. Available from: http://dyuthi.cusat.ac.in/purl/2118.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Manju,Paulson. DEVELOPMENT AND ANALYSIS OF DUAL FREQUENCY MICROSTRIP ANTENNAS. [Thesis]. Cochin University of Science and Technology; 2002. Available from: http://dyuthi.cusat.ac.in/purl/2118

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Not specified: Masters Thesis or Doctoral Dissertation

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