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1. (WO2018105513) WAVEGUIDE DEVICE MODULE AND MICROWAVE MODULE

Pub. No.:    WO/2018/105513    International Application No.:    PCT/JP2017/043266
Publication Date: Fri Jun 15 01:59:59 CEST 2018 International Filing Date: Sat Dec 02 00:59:59 CET 2017
IPC: H01P 5/08
G01S 7/03
G01S 13/34
G01S 13/93
H01P 3/123
H01P 5/12
Applicants: NIDEC CORPORATION
WGR CO., LTD.
Inventors: KIRINO Hideki
KAMO Hiroyuki
Title: WAVEGUIDE DEVICE MODULE AND MICROWAVE MODULE
Abstract:
A technique for reducing losses in a waveguide from a microwave IC to a transmission/reception antenna is provided. A waveguide device module includes a waveguide created between an electrically conductive member and a waveguide member. The waveguide member includes a stem and a plurality of branches extending from an end of the stem, including a first branch and a second branch. A first conductor line is connected to a first position on the first branch, and a second conductor line is connected to a second position on the second branch. The waveguide includes a first waveguide from the end of the stem to the first position and a second waveguide from the end of the stem to the second position. The first and second waveguides are formed so that, when the first and second conductor lines are respectively connected to two terminals of a microwave IC and first and second electromagnetic waves of a same frequency and mutually opposite phases propagate respectively through the first and second waveguides, a difference between a variation in phase of the first electromagnetic wave while propagating through the first waveguide and a variation in phase of the second electromagnetic wave while propagating through the second waveguide is within ±90 degrees of an odd multiple of 180 degrees.