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You searched for +publisher:"Cal Poly" +contributor:("Vladimir Ivanov Prodanov"). Showing records 1 – 2 of 2 total matches.

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1. Rai, Gursewak Singh. Constant Conduction Angle Biasing for Class C Monolithic RF Power Amplifiers.

Degree: MS, Electrical Engineering, 2012, Cal Poly

In modern wireless communication systems, a base station typically serves a few hundred users within its cell coverage. To combat the near-far problem – the situation where a nearby user’s strong cellular signal masks the cellular signal of a faraway user – base stations continually enforce power control. That is, nearby users must lower their transmit power. In CDMA technology, power control can be as large as 70-80dB. At low power outputs, this greatly impacts the performance of the RF power amplifier (PA) in the cellular device. For small RF drives, the magnitude of the output RF current approaches the magnitude of the DC current and thus the efficiency suffers. Operating the RF PA in class C operation improves the efficiency, but results in poor linearity. Several methods of so-called dynamic biasing have been proposed. These strategies entail lowering the bias of the PA as the RF drive increases. The proposed methods, however, fail to explain how to achieve linearity and low third-order intermodulation distortion. Additionally, the methods utilize open-loop implementations. This work presents a novel dynamic biasing topology that results in a much improved linear class C PA. The topology utilizes a closed loop that cleverly senses the operating conditions of the "power device." Particularly, the loop operates on the principle of keeping the conduction angle remarkably constant and thereby ensuring linearity. The work details a thorough design methodology that should provide assistance to a designer wanting to implement the topology in an RF integrated circuit. Agilent ADS simulations and laboratory results from a functional PCB prototype bring merit to the topology. Advisors/Committee Members: Vladimir Ivanov Prodanov.

Subjects/Keywords: Dynamic Biasing; Constant Conduction Angle; Linearized Class C; RF Power Amplifiers; Systems and Communications

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

APA (6th Edition):

Rai, G. S. (2012). Constant Conduction Angle Biasing for Class C Monolithic RF Power Amplifiers. (Masters Thesis). Cal Poly. Retrieved from https://digitalcommons.calpoly.edu/theses/872 ; 10.15368/theses.2012.190

Chicago Manual of Style (16th Edition):

Rai, Gursewak Singh. “Constant Conduction Angle Biasing for Class C Monolithic RF Power Amplifiers.” 2012. Masters Thesis, Cal Poly. Accessed December 12, 2019. https://digitalcommons.calpoly.edu/theses/872 ; 10.15368/theses.2012.190.

MLA Handbook (7th Edition):

Rai, Gursewak Singh. “Constant Conduction Angle Biasing for Class C Monolithic RF Power Amplifiers.” 2012. Web. 12 Dec 2019.

Vancouver:

Rai GS. Constant Conduction Angle Biasing for Class C Monolithic RF Power Amplifiers. [Internet] [Masters thesis]. Cal Poly; 2012. [cited 2019 Dec 12]. Available from: https://digitalcommons.calpoly.edu/theses/872 ; 10.15368/theses.2012.190.

Council of Science Editors:

Rai GS. Constant Conduction Angle Biasing for Class C Monolithic RF Power Amplifiers. [Masters Thesis]. Cal Poly; 2012. Available from: https://digitalcommons.calpoly.edu/theses/872 ; 10.15368/theses.2012.190


Cal Poly

2. Bendig, Rudi Matthew. AC Power Combining Strategy with Application to Efficient Linear Power Amplifiers.

Degree: MS, Electrical Engineering, 2014, Cal Poly

With the ongoing push for wireless systems to accommodate more users and support higher data rates more efficient modulation schemes have been created that are more advanced than simple FM and AM modulation used for radio broadcasting. These modulation schemes, such as orthogonal frequency division multiplexing (OFDM), suffer from high peak to average power ratios. Standard Class A and Class AB amplifiers cannot simultaneously achieve good linearity and efficiency, and therefore there has been an increase in the development of new topologies to combat this issue. Common features to these circuits is power combining of two or more separate transistors. In this work, we consider various ways of two-source power combining and identify four topologies of interest. We notice that linear power-efficient amplifiers reported to date are based upon two of the identified combining strategies. We believe that no amplifiers have been reported that leverage the other two alternatives. This work produces a fully-functional amplifier based on one of these alternatives. The prototypes are intended to serve as concept verification of the architecture and hence are implemented at lower (1 MHz) frequencies. Advisors/Committee Members: Vladimir Ivanov Prodanov.

Subjects/Keywords: Two-source power amplifier; Peak to Average Power Ratio; Linear Power Amplifier; Electrical and Electronics

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

APA (6th Edition):

Bendig, R. M. (2014). AC Power Combining Strategy with Application to Efficient Linear Power Amplifiers. (Masters Thesis). Cal Poly. Retrieved from https://digitalcommons.calpoly.edu/theses/1220 ; 10.15368/theses.2014.66

Chicago Manual of Style (16th Edition):

Bendig, Rudi Matthew. “AC Power Combining Strategy with Application to Efficient Linear Power Amplifiers.” 2014. Masters Thesis, Cal Poly. Accessed December 12, 2019. https://digitalcommons.calpoly.edu/theses/1220 ; 10.15368/theses.2014.66.

MLA Handbook (7th Edition):

Bendig, Rudi Matthew. “AC Power Combining Strategy with Application to Efficient Linear Power Amplifiers.” 2014. Web. 12 Dec 2019.

Vancouver:

Bendig RM. AC Power Combining Strategy with Application to Efficient Linear Power Amplifiers. [Internet] [Masters thesis]. Cal Poly; 2014. [cited 2019 Dec 12]. Available from: https://digitalcommons.calpoly.edu/theses/1220 ; 10.15368/theses.2014.66.

Council of Science Editors:

Bendig RM. AC Power Combining Strategy with Application to Efficient Linear Power Amplifiers. [Masters Thesis]. Cal Poly; 2014. Available from: https://digitalcommons.calpoly.edu/theses/1220 ; 10.15368/theses.2014.66

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