Improvement of return loss bandwidth of balanced amplifier using metamaterial-based quadrature power splitters

Chao Hsiung Tseng; Chih Lin Chang

doi:10.1109/LMWC.2008.918914

Improvement of return loss bandwidth of balanced amplifier using metamaterial-based quadrature power splitters

Chao Hsiung Tseng^*, Chih Lin Chang

^*Corresponding author for this work

National Yang Ming Chiao Tung University

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

Abstract

A new balanced amplifier (BA) using metamaterial- based quadrature power splitters (QPSs) is presented in this letter. Instead of using conventional 90° couplers, the developed BA is implemented by two parallel amplifiers with broadband metamaterial-based QPSs at input and output ends. Since the QPSs can provide a broadband quadrature phase difference between two outputs, the input/output reflections from two amplifiers can be effectively cancelled over a wide bandwidth. The developed BA demonstrates the input/output return loss of better than 10 dB from 1.2 to 3.5 GHz with 97.9% relative bandwidth.

Original language	English
Article number	4469939
Pages (from-to)	269-271
Number of pages	3
Journal	IEEE Microwave and Wireless Components Letters
Volume	18
Issue number	4
DOIs	https://doi.org/10.1109/LMWC.2008.918914
State	Published - Apr 2008

Keywords

Balanced amplifiers (BAs)
Broadband amplifiers
Metamaterials (MMs)
Quadrature power splitters (QPS)

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10.1109/LMWC.2008.918914

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abstract = "A new balanced amplifier (BA) using metamaterial- based quadrature power splitters (QPSs) is presented in this letter. Instead of using conventional 90° couplers, the developed BA is implemented by two parallel amplifiers with broadband metamaterial-based QPSs at input and output ends. Since the QPSs can provide a broadband quadrature phase difference between two outputs, the input/output reflections from two amplifiers can be effectively cancelled over a wide bandwidth. The developed BA demonstrates the input/output return loss of better than 10 dB from 1.2 to 3.5 GHz with 97.9% relative bandwidth.",

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Improvement of return loss bandwidth of balanced amplifier using metamaterial-based quadrature power splitters

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