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Patent Searching and Data


Title:
BAND-PASS FILTER
Document Type and Number:
WIPO Patent Application WO/2018/190272
Kind Code:
A1
Abstract:
The purpose of the present invention is to suppress an error between a central frequency and a target central frequency in a resonator coupling-type band-pass filter in which a post-wall waveguide is utilized. The band-pass filter (1) is provided with a dielectric substrate (2) sandwiched between a pair of conductor layers (3, 4), and post-walls (11, 12) comprising a plurality of conductor posts (11i, 12i) penetrating through the substrate (2) and short-circuiting the conductor layers (3, 4), wherein a plurality of resonators (22 to 24) comprising the conductor layers (3, 4) as a pair of wide walls and the post-walls (11, 12) as narrow walls are coupled. At least one of the resonators (22 to 24) is formed with a recess (221 to 241) penetrating through one of the wide walls (conductor layer 4) and reaching the inside of the substrate (2).

Inventors:
UEMICHI, Yusuke (1440 Mutsuzaki, Sakura-sh, Chiba 50, 〒2858550, JP)
Application Number:
JP2018/014755
Publication Date:
October 18, 2018
Filing Date:
April 06, 2018
Export Citation:
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Assignee:
FUJIKURA LTD. (1-5-1, Kiba Koto-k, Tokyo 12, 〒1358512, JP)
International Classes:
H01P1/208; H01P3/12; H01P11/00
Foreign References:
JPH11284409A1999-10-15
JPH11239006A1999-08-31
JPH1093311A1998-04-10
JPH08162805A1996-06-21
Other References:
YUSUKE UEMICHI: "Compact and Low-Loss Bandpass FilterRealized in Silica-Based Post-Wall Waveguide for 60-GHz applications", IEEE MTT-S IMS, May 2015 (2015-05-01)
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (Daiwa Minamimorimachi Building, 2-6 Tenjinbashi 2-chome Kita, Kita-ku, Osaka-sh, Osaka 41, 〒5300041, JP)
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