An X-band hybrid MIC feedforward amplifier for low residual noise operation

Author

Sokolov, Vladimir ; Kruchowski, James N. ; Vickberg, Mark E. ; Buhrow, Benjamin ; Schuster, Steven ; Bublitz, James ; Gilbert, Barry K. ; Daniel, Erik S.

Author_Institution

Mayo Clinic, Rochester, MN, USA

fYear

2005

fDate

12-17 June 2005

Abstract

A 10 GHz, 15 dB gain feedforward amplifier (FFA) is described whose design is primarily aimed at reducing residual phase noise. The two-module hybrid MIC construction incorporates GaAs MMICs and microstrip thin-film interconnects on alumina. For loop balance electronic gain control is achieved using dual gate distributed amplifiers, while phase control is accomplished with mechanical phase shifters and delay lines. Measurements of near carrier noise are made from 1 Hz to 6.4 MHz. In the flicker region the 1 Hz intercept is -110 dBc/Hz, with an approximate corner frequency around 30 KHz at -160 dBc/Hz.

Keywords

III-V semiconductors; MMIC amplifiers; distributed amplifiers; feedforward amplifiers; gain control; gallium arsenide; integrated circuit design; integrated circuit interconnections; integrated circuit noise; phase control; phase noise; phase shifters; 0.000001 to 6.4 MHz; 10 GHz; 15 dB; GaAs; MMIC feedforward amplifiers; X-band hybrid MIC feedforward amplifier; delay lines; dual gate distributed amplifiers; hybrid integrated circuits; loop balance electronic gain control; low residual noise operation; mechanical phase shifters; microstrip thin-film interconnects; near carrier noise; phase control; residual phase noise reduction; two-module hybrid MIC construction; Distributed amplifiers; Gain control; Gallium arsenide; Low-noise amplifiers; MMICs; Microstrip; Microwave integrated circuits; Operational amplifiers; Phase noise; Transistors;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2005 IEEE MTT-S International

ISSN

01490-645X

Print_ISBN

0-7803-8845-3

Type

conf

DOI

10.1109/MWSYM.2005.1517146

Filename

1517146