WO1995015018A1 - Filtre d'encoches hybride - Google Patents

Filtre d'encoches hybride Download PDF

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Publication number
WO1995015018A1
WO1995015018A1 PCT/GB1994/002582 GB9402582W WO9515018A1 WO 1995015018 A1 WO1995015018 A1 WO 1995015018A1 GB 9402582 W GB9402582 W GB 9402582W WO 9515018 A1 WO9515018 A1 WO 9515018A1
Authority
WO
WIPO (PCT)
Prior art keywords
network
filter
port
hybrid
notch filter
Prior art date
Application number
PCT/GB1994/002582
Other languages
English (en)
Inventor
John David Rhodes
Philip David Sleigh
Original Assignee
Filtronic Comtek Plc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Filtronic Comtek Plc filed Critical Filtronic Comtek Plc
Priority to EP95901546A priority Critical patent/EP0730784A1/fr
Publication of WO1995015018A1 publication Critical patent/WO1995015018A1/fr
Priority to NO962110A priority patent/NO962110L/no
Priority to FI962188A priority patent/FI962188A/fi

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters

Definitions

  • FIGURE 2 is a diagram of a hybrid notch filter in accordance with this invention.
  • the two-port bandpass network is a ladder structure constructed with a single switch connected at the centre of the filter.
  • the network In the closed state the network is unchanged, but in the open state both the even mode and odd mode admittance become the same as the even mode admittance Ye.
  • the overall even mode admittance is:

Landscapes

  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

Un filtre d'encoches hybride comprend un réseau d'inversion d'impédance raccordé à un réseau de filtrage à deux connexions. Dans sa forme la plus simple, le réseau d'inversion d'impédance comprend des inverseurs d'impédance d'une admittance caractéristique de pratiquement ∑2, raccordés entre les entrées et les sorties auquel le réseau de filtrage à deux connections est raccordé, et des inverseurs d'impédance d'une admittance caractéristique pratiquement égale à l'unité qui interconnectent les inverseurs d'impédance à admittance caractéristique de ∑2 à leurs extrémités respectives. Le réseau de filtrage à deux connexions peut être constitué de plusieurs résonateurs connectés en série et il est lui-même connecté aux sorties du réseau d'inversion d'impédance. Ce filtre d'encoches hybride peut prendre la forme d'un filtre d'encoches hybride commuté grâce à un commutateur placé entre une paire de résonateurs adjacents dans le réseau de filtrage.
PCT/GB1994/002582 1993-11-24 1994-11-24 Filtre d'encoches hybride WO1995015018A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP95901546A EP0730784A1 (fr) 1993-11-24 1994-11-24 Filtre d'encoches hybride
NO962110A NO962110L (no) 1993-11-24 1996-05-23 Hybrid smalbåndfilter
FI962188A FI962188A (fi) 1993-11-24 1996-05-23 Hybridi kaistanestosuodatin

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9324149.5 1993-11-24
GB9324149A GB2284311B (en) 1993-11-24 1993-11-24 Hybrid notch filter

Publications (1)

Publication Number Publication Date
WO1995015018A1 true WO1995015018A1 (fr) 1995-06-01

Family

ID=10745616

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1994/002582 WO1995015018A1 (fr) 1993-11-24 1994-11-24 Filtre d'encoches hybride

Country Status (6)

Country Link
EP (1) EP0730784A1 (fr)
CA (1) CA2176928A1 (fr)
FI (1) FI962188A (fr)
GB (1) GB2284311B (fr)
NO (1) NO962110L (fr)
WO (1) WO1995015018A1 (fr)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102576923A (zh) * 2009-11-02 2012-07-11 株式会社Kmw 射频滤波器
US8305164B1 (en) 2009-06-09 2012-11-06 The United States Of America, As Represented By The Secretary Of The Navy Frequency-agile frequency-selective variable attenuator
US9490866B2 (en) 2012-12-11 2016-11-08 University Of Southern California Passive leakage cancellation networks for duplexers and coexisting wireless communication systems
US9590794B2 (en) 2013-12-10 2017-03-07 University Of Southern California Enhancing isolation and impedance matching in hybrid-based cancellation networks and duplexers
US9755668B2 (en) 2015-09-30 2017-09-05 Abtum Inc. Radio frequency complex reflection coefficient reader
US9762416B2 (en) 2015-09-08 2017-09-12 Abtum Inc. Reflection coefficient reader
US9843302B2 (en) 2014-02-14 2017-12-12 University Of Southern California Reflection and hybrid reflection filters
US9866201B2 (en) 2015-09-08 2018-01-09 Abtum Inc. All-acoustic duplexers using directional couplers
US9871543B2 (en) 2014-02-19 2018-01-16 University Of Southern California Miniature acoustic resonator-based filters and duplexers with cancellation methodology
US9912326B2 (en) 2015-09-08 2018-03-06 Abtum Inc. Method for tuning feed-forward canceller
US10038458B2 (en) 2015-10-06 2018-07-31 Abtum Inc. Reflection-based radio-frequency multiplexers
US10476530B2 (en) 2015-10-12 2019-11-12 Qorvo Us, Inc. Hybrid-coupler-based radio frequency multiplexers
US10581650B2 (en) 2015-09-08 2020-03-03 Qorvo Us, Inc. Enhancing isolation in radio frequency multiplexers
US10615949B2 (en) 2014-02-14 2020-04-07 University Of Southern California Hybrid-based cancellation in presence of antenna mismatch
US10855246B2 (en) 2016-09-21 2020-12-01 Qorvo Us, Inc. Enhancing isolation in hybrid-based radio frequency duplexers and multiplexers

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9625416D0 (en) 1996-12-06 1997-01-22 Filtronic Comtek Microwave resonator
US6169760B1 (en) * 1998-03-19 2001-01-02 Hughes Electronics Corporation Fast, highly accurate frequency measurement technique
DE10304524A1 (de) * 2003-02-04 2004-08-12 Tesat-Spacecom Gmbh & Co.Kg Topologie für Bandpassfilter
GB2452934B (en) * 2007-09-19 2011-09-14 Isotek Electronics Ltd A tuneable bandpass filter
US7915977B2 (en) 2007-09-19 2011-03-29 Isotek Electronics Limited Tuneable bandpass filter

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1363332A1 (ru) * 1986-04-08 1987-12-30 Предприятие П/Я Г-4173 Частотно-селективное СВЧ-устройство
WO1990012429A1 (fr) * 1989-04-07 1990-10-18 Gec-Marconi Electronic Systems Corp. Agencement de filtrage pour filtre coupe-bande
US5055808A (en) * 1990-09-21 1991-10-08 Motorola, Inc. Bandwidth agile, dielectrically loaded resonator filter

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4100504A (en) * 1977-06-20 1978-07-11 Harris Corporation Band rejection filter having integrated impedance inverter-tune cavity configuration
US5173672A (en) * 1991-07-22 1992-12-22 Motorola, Inc. Dielectric block filter with included shielded transmission line inductors
US5202654A (en) * 1991-07-22 1993-04-13 Motorola, Inc. Multi-stage monolithic ceramic bandstop filter with isolated filter stages
US5221912A (en) * 1991-10-24 1993-06-22 Keane William J YIG tuned band reject filter for 2-18 GHz with full one-quarter wavelength RF coupling loops
GB2269705B (en) * 1992-08-15 1996-05-29 Racal Mesl Ltd Electrical filter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1363332A1 (ru) * 1986-04-08 1987-12-30 Предприятие П/Я Г-4173 Частотно-селективное СВЧ-устройство
WO1990012429A1 (fr) * 1989-04-07 1990-10-18 Gec-Marconi Electronic Systems Corp. Agencement de filtrage pour filtre coupe-bande
US5055808A (en) * 1990-09-21 1991-10-08 Motorola, Inc. Bandwidth agile, dielectrically loaded resonator filter

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
A. YE. ZNAMENSKIY ET AL.: "A method of designing microwave AFR and PFR equalizers", TELECOMMUNICATIONS AND RADIO ENGINEERING, vol. 39/49, no. 5, May 1985 (1985-05-01), WASHINGTON US, pages 108 - 111 *
SOVIET INVENTIONS ILLUSTRATED Section EI Week 8829, 23 June 1988 Derwent World Patents Index; Class W02, AN 88-204407/29 *
T. HIROTA ET AL.: "Reduced-size branch-line and rat-race hybrids for uniplanar MMIC's", IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, vol. 38, no. 3, March 1990 (1990-03-01), NEW YORK US, pages 270 - 275 *
Y. KOBAYASHI ET AL.: "A low-loss bandpass filter using electrically coupled high-Q TM01d dielectric rod resonators", IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, vol. 36, no. 12, December 1988 (1988-12-01), NEW YORK US, pages 1727 - 1732 *

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8305164B1 (en) 2009-06-09 2012-11-06 The United States Of America, As Represented By The Secretary Of The Navy Frequency-agile frequency-selective variable attenuator
KR101756116B1 (ko) 2009-11-02 2017-07-11 주식회사 케이엠더블유 무선 주파수 필터
EP2498331A2 (fr) * 2009-11-02 2012-09-12 KMW Inc. Filtre radiofréquence
JP2013509019A (ja) * 2009-11-02 2013-03-07 ケーエムダブリュ・インコーポレーテッド 無線周波数フィルター
EP2498331A4 (fr) * 2009-11-02 2013-05-15 Kmw Inc Filtre radiofréquence
US8749321B2 (en) 2009-11-02 2014-06-10 Kmw Inc. Radio frequency filter
EP2884578A1 (fr) * 2009-11-02 2015-06-17 KMW Inc. Filtre de fréquence radio
CN104966864A (zh) * 2009-11-02 2015-10-07 株式会社Kmw 射频滤波器
CN104966864B (zh) * 2009-11-02 2018-03-06 株式会社 Kmw 射频滤波器
US9564871B2 (en) 2009-11-02 2017-02-07 Kmw Inc. Radio frequency filter
CN102576923A (zh) * 2009-11-02 2012-07-11 株式会社Kmw 射频滤波器
US9490866B2 (en) 2012-12-11 2016-11-08 University Of Southern California Passive leakage cancellation networks for duplexers and coexisting wireless communication systems
US9590794B2 (en) 2013-12-10 2017-03-07 University Of Southern California Enhancing isolation and impedance matching in hybrid-based cancellation networks and duplexers
US10615949B2 (en) 2014-02-14 2020-04-07 University Of Southern California Hybrid-based cancellation in presence of antenna mismatch
US9843302B2 (en) 2014-02-14 2017-12-12 University Of Southern California Reflection and hybrid reflection filters
US9871543B2 (en) 2014-02-19 2018-01-16 University Of Southern California Miniature acoustic resonator-based filters and duplexers with cancellation methodology
US9912326B2 (en) 2015-09-08 2018-03-06 Abtum Inc. Method for tuning feed-forward canceller
US9866201B2 (en) 2015-09-08 2018-01-09 Abtum Inc. All-acoustic duplexers using directional couplers
US9762416B2 (en) 2015-09-08 2017-09-12 Abtum Inc. Reflection coefficient reader
US10581650B2 (en) 2015-09-08 2020-03-03 Qorvo Us, Inc. Enhancing isolation in radio frequency multiplexers
US9755668B2 (en) 2015-09-30 2017-09-05 Abtum Inc. Radio frequency complex reflection coefficient reader
US10038458B2 (en) 2015-10-06 2018-07-31 Abtum Inc. Reflection-based radio-frequency multiplexers
US10476530B2 (en) 2015-10-12 2019-11-12 Qorvo Us, Inc. Hybrid-coupler-based radio frequency multiplexers
US10560129B2 (en) 2015-10-12 2020-02-11 Qorvo Us, Inc. Hybrid-coupler-based radio frequency multiplexers
US10673471B2 (en) 2015-10-12 2020-06-02 Qorvo Us, Inc. Hybrid-coupler-based radio frequency multiplexers
US10673472B2 (en) 2015-10-12 2020-06-02 Qorvo Us, Inc. Hybrid-coupler-based radio frequency multiplexers
US10855246B2 (en) 2016-09-21 2020-12-01 Qorvo Us, Inc. Enhancing isolation in hybrid-based radio frequency duplexers and multiplexers

Also Published As

Publication number Publication date
EP0730784A1 (fr) 1996-09-11
FI962188A0 (fi) 1996-05-23
NO962110D0 (no) 1996-05-23
FI962188A (fi) 1996-07-15
GB9324149D0 (en) 1994-01-12
NO962110L (no) 1996-07-02
GB2284311A (en) 1995-05-31
CA2176928A1 (fr) 1995-06-01
GB2284311B (en) 1998-03-04

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