High-Power Protection Switch Using Stub/Line Selectable Circuits

Masatake HANGAI  Kazuhiko NAKAHARA  Mamiko YAMAGUCHI  Morishige HIEDA  

IEICE TRANSACTIONS on Electronics   Vol.E94-C    No.5    pp.814-819
Publication Date: 2011/05/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E94.C.814
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Fundamentals and Applications of Advanced Semiconductor Devices)
switch,  high-power,  MMIC,  monolithic microwave integrated circuit,  

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High-power protection switch utilizing a new stub/line selectable configuration is presented. By employing the proposed circuit topology, the insertion loss at receiving mode and the power handling capability at transmitting mode can be independently designed. Therefore, the proposed circuit is able to achieve low insertion loss at receiving mode while keeping high-power performance at transmitting mode. To verify this methodology, MMIC switch has been fabricated in Ka-band. The circuit has achieved the insertion loss of 2 dB, the isolation of 25 dB, and the power handling capability of 40 dBm at 5% bandwidth.