Title:
STUB TUNER
Document Type and Number:
WIPO Patent Application WO/2022/080074
Kind Code:
A1
Abstract:
[Problem] To provide a stub tuner which prevents leakage of radio waves from an opening in a tube axial direction end portion of a waveguide tube. [Solution] A stub tuner 2 includes a first conductor (20, 120), and a rod-shaped conductor shaft 23. The first conductor is inserted into a tube axial direction inner side AD1 from an opening 10 in a waveguide tube (1, 101) which transmits high frequency waves. The first conductor includes a plate-shaped first shape (21, 121) which extends in a direction intersecting a tube axial direction AD, inside the waveguide tube, and a plate-shaped second shape (22, 122) which extends from the outer end in the tube radial direction of the first shape toward the tube axial direction outer side AD2 in the tube axial direction AD. An outer circumferential surface 22a of the second shape is separated from an inner surface 1b of the waveguide tube 1. An electrical length EL2 of the outer circumferential surface 22a of the second shape in the tube axial direction AD is 1/4 of a wavelength λ of the high-frequency waves. The conductor shaft 23 is electrically connected to the waveguide tube, supports the first conductor, and extends in the tube axial direction AD.
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Inventors:
FUJISAKI KAZUYOSHI (JP)
HATAYA MITSUHIKO (JP)
HATAYA MITSUHIKO (JP)
Application Number:
PCT/JP2021/033884
Publication Date:
April 21, 2022
Filing Date:
September 15, 2021
Export Citation:
Assignee:
FURUNO ELECTRIC CO (JP)
International Classes:
H01P5/04
Domestic Patent References:
| WO2016135899A1 | 2016-09-01 |
Foreign References:
| US3049684A | 1962-08-14 | |||
| US5138289A | 1992-08-11 | |||
| JPS56130305U | 1981-10-03 | |||
| JPS58125401U | 1983-08-26 | |||
| JPS5013464Y1 | 1975-04-24 | |||
| JPH07106808A | 1995-04-21 | |||
| JPS57204702U | 1982-12-27 | |||
| JPH03105002U | 1991-10-31 | |||
| JPS5813701U | 1983-01-28 | |||
| JPH0878914A | 1996-03-22 | |||
| JP2010168684A | 2010-08-05 |
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