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1. (WO2017149698) VECTOR SYNTHESIS PHASE SHIFTER AND WIRELESS COMMUNICATION DEVICE

Pub. No.:    WO/2017/149698    International Application No.:    PCT/JP2016/056426
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Thu Mar 03 00:59:59 CET 2016
IPC: H03H 11/22
H03H 7/21
Applicants: MITSUBISHI ELECTRIC CORPORATION
三菱電機株式会社
Inventors: FUJIWARA, Takanobu
藤原 孝信
MARUYAMA, Takaya
丸山 隆也
TANIGUCHI, Eiji
谷口 英司
Title: VECTOR SYNTHESIS PHASE SHIFTER AND WIRELESS COMMUNICATION DEVICE
Abstract:
A vector synthesis phase shifter is configured so that a gain control unit (9), by controlling the gains of an I VGA (5) and a Q VGA (6), adjusts the phases of synthesized signals output from a signal synthesis unit (7) without changing the amplitudes thereof, and a bias control unit (10) controls bias currents in gate-grounded transistors (11a), (11b), (21a), and (22b) included in the I VGA (5) and the Q VGA (6). As a result, noise reduction and higher gain can be achieved and the accuracy of phase shift can be increased.