Title:
BAND-PASS FILTER AND HIGH-FREQUENCY FRONT-END CIRCUIT COMPRISING SAME
Document Type and Number:
WIPO Patent Application WO/2022/019041
Kind Code:
A1
Abstract:
A band-pass filter (100) comprises a dielectric substrate (110), conductor plates (P1, P2), a ground via (VG), waveguide resonators (R1–R7), and a trap resonator (RT). The conductor plates (P1, P2) are provided within the dielectric substrate, and are disposed so as to face one another. The ground via (VG) connects the conductor plates (P1, P2). The waveguide resonators, in a space sandwiched by the conductor plates (P1, P2), are coupled in series along a principal coupling path that extends from an input terminal (T1) to an output terminal (T2). The waveguide resonators disposed adjacent to one another along the main principal coupling path are inductively coupled. The trap resonator (RT) couples two sets of waveguide resonators included in said waveguide resonators, so as to skip a part of the principal coupling path and capacitively couples the waveguide resonators included in each of the sets.
Inventors:
KIKUDA MASAYUKI (JP)
Application Number:
PCT/JP2021/023739
Publication Date:
January 27, 2022
Filing Date:
June 23, 2021
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H01P1/208; H01P3/12
Foreign References:
| JP2007208395A | 2007-08-16 | |||
| JP2000022403A | 2000-01-21 | |||
| JPS6478001A | 1989-03-23 | |||
| JP2019134326A | 2019-08-08 | |||
| JP2014522182A | 2014-08-28 | |||
| EP1791212A1 | 2007-05-30 | |||
| US5608363A | 1997-03-04 | |||
| US5841330A | 1998-11-24 | |||
| US6275124B1 | 2001-08-14 |
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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