Title:
FILTER DEVICE
Document Type and Number:
Japanese Patent JP2021064904
Kind Code:
A
Abstract:
To realize a narrow bandpass filter with smaller insertion loss than conventional bandpass filters.SOLUTION: A bandpass filter (1) includes a first bandpass filter (1A) including a plurality of electromagnetically coupled resonators (11A to 15A), and a second bandpass filter (1B) including a plurality of electromagnetically coupled resonators (11B to 15B). A number of resonators (11A to 15A) included in the first bandpass filter (1A) and a number of resonators (11B to 15B) included in the second bandpass filter (1B) are equal to each other. A pass band of the first bandpass filter (1A) and a pass band of the second bandpass filter (1B) are set so as to be different from each other and have a common part.SELECTED DRAWING: Figure 1
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Inventors:
UEMICHI YUSUKE
Application Number:
JP2019189572A
Publication Date:
April 22, 2021
Filing Date:
October 16, 2019
Export Citation:
Assignee:
FUJIKURA LTD
International Classes:
H01P1/208; H01P7/06
Domestic Patent References:
| JP2018191267A | 2018-11-29 | |||
| JPH05335809A | 1993-12-17 | |||
| JP2001085914A | 2001-03-30 | |||
| JP2002141704A | 2002-05-17 | |||
| JP2005295428A | 2005-10-20 |
Foreign References:
| US3587008A | 1971-06-22 | |||
| US20150061793A1 | 2015-03-05 | |||
| CN103107394A | 2013-05-15 |
Attorney, Agent or Firm:
Harakenzo world patent & trademark