Advanced search options

Advanced Search Options 🞨

Browse by author name (“Author name starts with…”).

Find ETDs with:

in
/  
in
/  
in
/  
in

Written in Published in Earliest date Latest date

Sorted by

Results per page:

You searched for subject:(front end recievers). One record found.

Search Limiters

Last 2 Years | English Only

No search limiters apply to these results.

▼ Search Limiters


RMIT University

1. Lopez-Lara, E. Reconfigurable photonic antennas.

Degree: 2009, RMIT University

Sharing the electromagnetic spectrum and the physical space for multiple wireless applications in commercial and military applications has resulted in large and complex integrated solutions. Traditional microwave approaches required to look for other alternatives to overcome the aerodynamics limits of front-end devices, particularly in airborne platforms. The implementation of Microwave Photonics techniques to remote microwave antennas is increasingly finding more and more application in airborne Electromagnetic Support applications. This is not only because optical fibres are excellent substitutes of bulky transmission lines (e.g., coaxial and rectangular waveguide) but also because traditional microwave signal processing techniques can also be implemented using photonic techniques. The aim of this dissertation is to investigate the use of Microwave Photonic technologies and photonic signal processing techniques as a means of improving front-end receivers for wireless platforms, particularly for airborne Electronic Warfare applications. This work focuses in specific on the development of a single shared aperture sensor for Electromagnetic Support applications such as early detection radar and direction finding. The use of photonic signal processing techniques such as polarisation diversity, multiplexing and transversal techniques is proposed to control the radiation characteristics of multifunctional broadband antennas. Major contributions made by this work include the derivation of a flexible and broadband receiving “wireless kiosk” suitable for current and future integrated multiple antenna systems. The design and development of an orthogonal mode transformer that enables the multi-mode operational characteristics of broadband frequency independent two-arm spiral antennas. The implementation of a Photonic 180° hybrid coupler that controls the radiation modes of a multi-mode two-arm spiral antenna. The implementation of a microwave photonic mode transformer using photonic signal processing techniques that substitutes complex and bulky microwave mode transformers such as microwave Butler matrices. In specific, photonic transversal techniques were used to implement 90° photonic hybrid couplers that, combined with 180° photonic hybrid couplers, controlled the radiation patterns and polarisation characteristics of a multifunctional four- arms sinuous antenna.

Subjects/Keywords: Fields of Research; microwave photonic; reconfigurable antennas; photonic transversal techniques; front-end recievers; wavelength division multiplexing; broadband antennas; two-arm spiral antenna; 90° photonic hybrid coupler; 180° photonic hybrid coupler; Four-arm sinuous antenna

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

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

APA (6th Edition):

Lopez-Lara, E. (2009). Reconfigurable photonic antennas. (Thesis). RMIT University. Retrieved from http://researchbank.rmit.edu.au/view/rmit:6132

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

Chicago Manual of Style (16th Edition):

Lopez-Lara, E. “Reconfigurable photonic antennas.” 2009. Thesis, RMIT University. Accessed December 02, 2020. http://researchbank.rmit.edu.au/view/rmit:6132.

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

MLA Handbook (7th Edition):

Lopez-Lara, E. “Reconfigurable photonic antennas.” 2009. Web. 02 Dec 2020.

Vancouver:

Lopez-Lara E. Reconfigurable photonic antennas. [Internet] [Thesis]. RMIT University; 2009. [cited 2020 Dec 02]. Available from: http://researchbank.rmit.edu.au/view/rmit:6132.

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

Council of Science Editors:

Lopez-Lara E. Reconfigurable photonic antennas. [Thesis]. RMIT University; 2009. Available from: http://researchbank.rmit.edu.au/view/rmit:6132

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

.