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Miniaturized Millimeter-Wave HMIC Amplifiers Using Capacitively-Coupled Matching Circuits and FETs with Resistive Source-Stubs

Hiromitsu UCHIDA, Hideshi HANJYO, Yasushi ITOH

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Summary :

Miniaturized millimeter-wave HMIC amplifiers have been developed by using capacitively-coupled matching circuits (CCMC) and FETs with resistive source-stubs. CCMC includes FET's parasitic reactances, and is able to reduce the size of a matching circuit in a HMIC amplifier to about 1/3 of a conventional matching circuit using an open-circuited stub for matching and a quarter-wavelength coupled-line for d. c. blocking. The resistive source-stubs, which consist of two open-circuited stubs and a resistor, can improve the gain and stability of FETs at millimeter-wave frequencies. In this paper, design procedures of CCMC and the resistive source-stubs are described, and their usefulness has been confirmed experimentally through measurements of prototype V-band high-power HMIC amplifiers.

Publication
IEICE TRANSACTIONS on Electronics Vol.E82-C No.11 pp.2087-2093
Publication Date
1999/11/25
Publicized
Online ISSN
DOI
Type of Manuscript
PAPER
Category
Microwave and Millimeter Wave Technology

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