Title:
A TUNEABLE MICROWAVE FILTER AND A TUNEABLE MICROWAVE MULTIPLEXER
Document Type and Number:
WIPO Patent Application WO/2016/174424
Kind Code:
A3
Abstract:
A tuneable microwave filter having a passband and a stopband with a substantially constant passband bandwidth across a tuneable band, the filter comprising a plurality of resonators, each resonator having an equivalent electrical circuit comprising a short circuited stub in parallel with a capacitor; the resonators being etectrically coupled together such that each resonator is electrically coupled to at least one other resonator by an electrical coupling equivalent to a short circuited stub; each short circuited stub being dimensioned such that its electrical length Θ varies between 2π/9 and 13π/36 or a portion of that range across the tuneable band.
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Inventors:
RHODES DAVID (GB)
Application Number:
PCT/GB2016/051185
Publication Date:
December 22, 2016
Filing Date:
April 27, 2016
Export Citation:
Assignee:
RHODES DAVID (GB)
International Classes:
H01P1/208; H01P7/10
Foreign References:
| JP2009278347A | 2009-11-26 | |||
| US20130271243A1 | 2013-10-17 | |||
| US5691675A | 1997-11-25 | |||
| GB2505161A | 2014-02-26 |
Other References:
PENG WONG ET AL: "Electronically Tunable Filters", IEEE MICROWAVE MAGAZINE, IEEESERVICE CENTER, PISCATAWAY, NJ, US, vol. 10, no. 6, 1 October 2009 (2009-10-01), pages 46 - 54, XP011276497, ISSN: 1527-3342, DOI: 10.1109/MMM.2009.933593
GOMEZ-GARCIA ROBERTO ET AL: "Reconfigurable Multi-Band Microwave Filters", IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 63, no. 4, 1 April 2015 (2015-04-01), pages 1294 - 1307, XP011577407, ISSN: 0018-9480, [retrieved on 20150402], DOI: 10.1109/TMTT.2015.2405066
GOMEZ-GARCIA ROBERTO ET AL: "Reconfigurable Multi-Band Microwave Filters", IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 63, no. 4, 1 April 2015 (2015-04-01), pages 1294 - 1307, XP011577407, ISSN: 0018-9480, [retrieved on 20150402], DOI: 10.1109/TMTT.2015.2405066
Attorney, Agent or Firm:
HEPWORTH BROWNE (Valley RoadHebden Bridge, Yorkshire HX7 7BN, GB)
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