Umudike Journal of Engineering and Technology

Michael Okpara University of Agriculture, Umudike


V-BAND MMIC NON-FOSTER MATCHED CLASS-J GAAS PHEMT POWER AMPLIFIER

Charles, N. A.
Department of Electrical/Electronics Engineering, Michael Okpara University of Agriculture Umudike, Nigeria

Agwu, O. E.
Department of Electrical/Electronics Engineering, Michael Okpara University of Agriculture Umudike, Nigeria.



ABSTRACT

This paper proposes V-band non-Foster matched Class-J GaAs pHEMT (gallium arsenide pseudomorphic high electron mobility transistor) power amplifier (PA). In this work, the effect of non-Foster circuit on the performance of V-band Class-J power amplifier suitable for submillimeter wave applications is examined. The parameters investigated include drain efficiency, power added efficiency, output power, transducer power gain and noise figure. The GaAs pHEMT transistor was biased with drain supply voltage of 3 V at quiescent drainto-source current of 3 mA while the non-Foster circuit transistors are biased with 2 V at 2 mA. The power amplifier operates from 65 to 69 GHz. The simulation results of Class-J GaAs pHEMT PAs with and without non-Foster circuit from 65 to 69 GHz were obtained and compared. The simulation results indicate that the PA with NFC has 40.5% drain efficiency, 32.5% PAE, 19 dBm output power, 7dBm transducer power gain and lower minimum noise figure of 4.6 dB whereas the PA without non-Foster circuit has 26.7% drain efficiency, 14.5% PAE, 11.6 dBm output power, -0.4 dB power gain and minimum noise figure of 4.9 dB.


Keywords: MMIC, V-band, non-Foster circuit, GaAs pHEMT, power amplifier


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Conference Code
IECON2019

Conference Title
ENGINEERING FOR SUSTAINABLE ECONOMIC DIVERSIFICATION, FOOD AND NATIONAL SECURITY

ISBN
978-978-53175-8-9

Date Published
Friday, September 20, 2019

Conference Date
2nd - 4th September, 2019

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