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High gain dual-band distributed amplifier using new composite right/left-handed transmission line

Published online by Cambridge University Press:  04 October 2018

Hamed Shahraki ,
Ahmad Hakimi ,
Kambiz Afrooz  and
Mohammad Mahdi Pezhman
Hamed Shahraki
Affiliation:
Department of Electrical Engineering, Shahid Bahonar University of Kerman, Kerman, Iran
Ahmad Hakimi
Affiliation:
Department of Electrical Engineering, Shahid Bahonar University of Kerman, Kerman, Iran
Kambiz Afrooz*
Affiliation:
Department of Electrical Engineering, Shahid Bahonar University of Kerman, Kerman, Iran
Mohammad Mahdi Pezhman
Affiliation:
Department of Electrical Engineering, Yazd University, Yazd, Iran
*
Author for correspondence: Kambiz Afrooz, E-mail: [email protected]
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Abstract

In this paper, a high-gain dual-band distributed amplifier (DBDA) based on the metamaterial transmission line (TL) is proposed. To have two separate frequency bands in the distributed amplifiers, the composite right/left-handed (CRLH) TLs are used instead of conventional TLs. Although both forward and reverse gains of the distributed amplifiers are available in this case, they suffer from their low gains. In this paper, to increase the DBDA power gain, a new circuit architecture for the CRLH TL is introduced. By using the proposed CRLH TL, a lower wave attenuation coefficient at the forward band of the DBDA is achieved than the conventional structures, which causes a higher forward power gain. Simulation results also show that the power gain of the proposed DBDA is about 28.5 dB at the desired frequency bands, and good agreement between the measurement and simulation results confirms the accuracy of the design method.

Keywords

Composite right/left-handed (CRLH)dual-band distributed amplifier (DBDA)
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 10 , Issue 10 , December 2018 , pp. 1118 - 1127
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2018 

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