Title:
DIPLEXER
Document Type and Number:
WIPO Patent Application WO/2018/173721
Kind Code:
A1
Abstract:
The purpose of the present invention is to increase isolation between a port that functions as a transmission port and a port that functions as a reception port in a diplexer. A diplexer (1) is provided with: a filter pair (11) comprising a parallel arrangement of first and second filters (12, 13) having a first frequency band as a pass band; first and second directional coupling sections (21, 31) which are respectively connected to one side and the other side of the filter pair (11); and a third filter (41) which is connected to a port (third port 213) of the first directional coupling section (21) on the opposite side from the filter pair (11), and which has a second frequency band as a pass band.
Inventors:
UEMICHI YUSUKE (JP)
Application Number:
PCT/JP2018/008339
Publication Date:
September 27, 2018
Filing Date:
March 05, 2018
Export Citation:
Assignee:
FUJIKURA LTD (JP)
International Classes:
H01P1/213; H01P3/12; H01P5/107
Domestic Patent References:
| WO2014126194A1 | 2014-08-21 |
Foreign References:
| US3056096A | 1962-09-25 | |||
| JP6042014B1 | 2016-12-14 | |||
| JP6200613B1 | 2017-09-20 |
Other References:
AITKEN, J. R. ET AL.: "Design of millimetre wave diplexers with relaxed fabrication tolerances", IET MICROWAVES, ANTENNAS & PROPAGATION, vol. 9, no. 8, 1 June 2015 (2015-06-01), pages 802 - 807, XP006052365
CHENG, Y. L. ET AL.: "A W-band quadrature hybrid coupled substrate integrated waveguide diplexer", 2015 ASIA-PACIFIC MICROWAVE CONFERENCE, February 2016 (2016-02-01), XP055545711
See also references of EP 3605724A4
RICHARD J. CAMERON ET AL.: "MICROWAVE FILTERS for COMMUNICATION SYSTEMS", 2007, JOHN WILEY & SONS, INC., pages: 661 - 663
CHENG, Y. L. ET AL.: "A W-band quadrature hybrid coupled substrate integrated waveguide diplexer", 2015 ASIA-PACIFIC MICROWAVE CONFERENCE, February 2016 (2016-02-01), XP055545711
See also references of EP 3605724A4
RICHARD J. CAMERON ET AL.: "MICROWAVE FILTERS for COMMUNICATION SYSTEMS", 2007, JOHN WILEY & SONS, INC., pages: 661 - 663
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (JP)
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