Title :
A compact T/R switching circuit using quadrature couplers and drain-driven HPAs
Author :
Uchida, H. ; Nii, M. ; Tsukahara, Y. ; Miyazaki, M. ; Itoh, Y.
Author_Institution :
Mitsubishi Electr. Corp., Kanagawa, Japan
Abstract :
A novel T/R switching circuit is proposed for microwave T/R modules. It consists of balanced high-power amplifiers with quadrature couplers, and a low-noise amplifier which is connected to the isolation port of the coupler. In RX-mode, the HPAs are switched off by controlling drain voltage of FETs. A prototype C- to Ku-band T/R switching circuit has been fabricated, and the validity of the switching method has been confirmed experimentally.
Keywords :
MMIC power amplifiers; differential amplifiers; radar equipment; switching circuits; transceivers; waveguide couplers; C/Ku-band; RX-mode; T/R switching circuit; balanced high-power amplifiers; drain voltage; drain-driven HPAs; isolation port; low-noise amplifier; microwave T/R modules; quadrature couplers; Circulators; Communication switching; Couplers; High power amplifiers; Low-noise amplifiers; MMICs; Reflection; Switches; Switching circuits; Voltage control;
Conference_Titel :
Microwave Symposium Digest, 2001 IEEE MTT-S International
Conference_Location :
Phoenix, AZ, USA
Print_ISBN :
0-7803-6538-0
DOI :
10.1109/MWSYM.2001.967144
