Improvements in the Design of Matrix Distributed Amplifiers

Emad HAMIDI  Mahmoud MOHAMMAD-TAHERI  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E89-C   No.6   pp.861-864
Publication Date: 2006/06/01
Online ISSN: 1745-1353
DOI: 10.1093/ietele/e89-c.6.861
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Microwaves, Millimeter-Waves
Keyword: 
matrix distributed amplifier,  transmission line,  matching network,  

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Summary: 
A simple method for the gain improvement of matrix distributed amplifiers is presented. The method is based on modifying the central transmission line of the matrix amplifier without any changes in the input and output transmission lines. In the new method the termination impedances in the central transmission line are modified and the transmission line is replaced by an impedance matching circuitry. It has been shown that the new method can significantly improve the gain while preserving the input and output return losses of the amplifier.