FI933988A - Radiofrekvensfilter bestaoende av flera resonatorer - Google Patents

Radiofrekvensfilter bestaoende av flera resonatorer Download PDF

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Publication number
FI933988A
FI933988A FI933988A FI933988A FI933988A FI 933988 A FI933988 A FI 933988A FI 933988 A FI933988 A FI 933988A FI 933988 A FI933988 A FI 933988A FI 933988 A FI933988 A FI 933988A
Authority
FI
Finland
Prior art keywords
radio frequency
frequency filter
several resonators
resonators
several
Prior art date
Application number
FI933988A
Other languages
English (en)
Finnish (fi)
Other versions
FI933988A0 (fi
FI110148B (sv
Inventor
Erkki Niiranen
Original Assignee
Lk Products Oy
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 Lk Products Oy filed Critical Lk Products Oy
Priority to FI933988A priority Critical patent/FI110148B/sv
Publication of FI933988A0 publication Critical patent/FI933988A0/fi
Priority to EP94306650A priority patent/EP0643481B1/en
Priority to DE69431022T priority patent/DE69431022T2/de
Priority to JP6217365A priority patent/JPH07170204A/ja
Publication of FI933988A publication Critical patent/FI933988A/sv
Priority to US08/746,675 priority patent/US5717368A/en
Application granted granted Critical
Publication of FI110148B publication Critical patent/FI110148B/sv

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/12—Bandpass or bandstop filters with adjustable bandwidth and fixed centre frequency
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/17—Structural details of sub-circuits of frequency selective networks
    • H03H7/1741—Comprising typical LC combinations, irrespective of presence and location of additional resistors
    • H03H7/1791—Combined LC in shunt or branch path
FI933988A 1993-09-10 1993-09-10 Radiofrekvensfilter bestående av flera resonatorer FI110148B (sv)

Priority Applications (5)

Application Number Priority Date Filing Date Title
FI933988A FI110148B (sv) 1993-09-10 1993-09-10 Radiofrekvensfilter bestående av flera resonatorer
EP94306650A EP0643481B1 (en) 1993-09-10 1994-09-09 Radio frequency filter
DE69431022T DE69431022T2 (de) 1993-09-10 1994-09-09 Funkfrequenzfilter
JP6217365A JPH07170204A (ja) 1993-09-10 1994-09-12 無線周波数フィルタ、及びこれを用いた無線電話
US08/746,675 US5717368A (en) 1993-09-10 1996-11-14 Varactor tuned helical resonator for use with duplex filter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI933988 1993-09-10
FI933988A FI110148B (sv) 1993-09-10 1993-09-10 Radiofrekvensfilter bestående av flera resonatorer

Publications (3)

Publication Number Publication Date
FI933988A0 FI933988A0 (fi) 1993-09-10
FI933988A true FI933988A (sv) 1995-03-11
FI110148B FI110148B (sv) 2002-11-29

Family

ID=8538571

Family Applications (1)

Application Number Title Priority Date Filing Date
FI933988A FI110148B (sv) 1993-09-10 1993-09-10 Radiofrekvensfilter bestående av flera resonatorer

Country Status (5)

Country Link
US (1) US5717368A (sv)
EP (1) EP0643481B1 (sv)
JP (1) JPH07170204A (sv)
DE (1) DE69431022T2 (sv)
FI (1) FI110148B (sv)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5717368A (en) * 1993-09-10 1998-02-10 Lk-Products Oy Varactor tuned helical resonator for use with duplex filter

Families Citing this family (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2002218005A1 (en) 2000-11-03 2002-05-15 Paratek Microwave, Inc. Method of channel frequency allocation for rf and microwave duplexers
SE520112C2 (sv) * 2000-12-27 2003-05-27 Allgon Ab Metod samt system för att avstämma ett radiofilter
EP1763905A4 (en) 2004-06-28 2012-08-29 Pulse Finland Oy ANTENNA COMPONENT
FI20055420A0 (sv) * 2005-07-25 2005-07-25 Lk Products Oy Reglerbar flerbandsantenn
FI119009B (sv) * 2005-10-03 2008-06-13 Pulse Finland Oy Flerbandsantennsystem
FI118782B (sv) 2005-10-14 2008-03-14 Pulse Finland Oy Reglerbar antenn
FI119577B (sv) * 2005-11-24 2008-12-31 Pulse Finland Oy Flerbandsantennkomponent
US8618990B2 (en) 2011-04-13 2013-12-31 Pulse Finland Oy Wideband antenna and methods
US10211538B2 (en) 2006-12-28 2019-02-19 Pulse Finland Oy Directional antenna apparatus and methods
FI20075269A0 (sv) * 2007-04-19 2007-04-19 Pulse Finland Oy Förfarande och system för anpassning av en antenn
FI120427B (sv) 2007-08-30 2009-10-15 Pulse Finland Oy Reglerbar flerbandsantenn
KR101610956B1 (ko) * 2009-10-01 2016-04-08 삼성전자주식회사 무선 통신 시스템을 위한 광대역 수신 장치 및 그 제어 방법
FI20096134A0 (sv) 2009-11-03 2009-11-03 Pulse Finland Oy Reglerbar antenn
FI20096251A0 (sv) 2009-11-27 2009-11-27 Pulse Finland Oy MIMO-antenn
US8847833B2 (en) * 2009-12-29 2014-09-30 Pulse Finland Oy Loop resonator apparatus and methods for enhanced field control
FI20105158A (sv) 2010-02-18 2011-08-19 Pulse Finland Oy Med skalstrålare försedd antenn
US9406998B2 (en) 2010-04-21 2016-08-02 Pulse Finland Oy Distributed multiband antenna and methods
FI20115072A0 (sv) 2011-01-25 2011-01-25 Pulse Finland Oy Multiresonansantenn, -antennmodul och radioanordning
US9673507B2 (en) 2011-02-11 2017-06-06 Pulse Finland Oy Chassis-excited antenna apparatus and methods
US8648752B2 (en) 2011-02-11 2014-02-11 Pulse Finland Oy Chassis-excited antenna apparatus and methods
US8866689B2 (en) 2011-07-07 2014-10-21 Pulse Finland Oy Multi-band antenna and methods for long term evolution wireless system
US9450291B2 (en) 2011-07-25 2016-09-20 Pulse Finland Oy Multiband slot loop antenna apparatus and methods
US9123990B2 (en) 2011-10-07 2015-09-01 Pulse Finland Oy Multi-feed antenna apparatus and methods
US9531058B2 (en) 2011-12-20 2016-12-27 Pulse Finland Oy Loosely-coupled radio antenna apparatus and methods
US9484619B2 (en) 2011-12-21 2016-11-01 Pulse Finland Oy Switchable diversity antenna apparatus and methods
US8988296B2 (en) 2012-04-04 2015-03-24 Pulse Finland Oy Compact polarized antenna and methods
US9979078B2 (en) 2012-10-25 2018-05-22 Pulse Finland Oy Modular cell antenna apparatus and methods
US10069209B2 (en) 2012-11-06 2018-09-04 Pulse Finland Oy Capacitively coupled antenna apparatus and methods
US10079428B2 (en) 2013-03-11 2018-09-18 Pulse Finland Oy Coupled antenna structure and methods
US9647338B2 (en) 2013-03-11 2017-05-09 Pulse Finland Oy Coupled antenna structure and methods
US9634383B2 (en) 2013-06-26 2017-04-25 Pulse Finland Oy Galvanically separated non-interacting antenna sector apparatus and methods
US9680212B2 (en) 2013-11-20 2017-06-13 Pulse Finland Oy Capacitive grounding methods and apparatus for mobile devices
US9590308B2 (en) 2013-12-03 2017-03-07 Pulse Electronics, Inc. Reduced surface area antenna apparatus and mobile communications devices incorporating the same
US9893715B2 (en) 2013-12-09 2018-02-13 Shure Acquisition Holdings, Inc. Adaptive self-tunable antenna system and method
US9350081B2 (en) 2014-01-14 2016-05-24 Pulse Finland Oy Switchable multi-radiator high band antenna apparatus
US9973228B2 (en) 2014-08-26 2018-05-15 Pulse Finland Oy Antenna apparatus with an integrated proximity sensor and methods
US9948002B2 (en) 2014-08-26 2018-04-17 Pulse Finland Oy Antenna apparatus with an integrated proximity sensor and methods
US9722308B2 (en) 2014-08-28 2017-08-01 Pulse Finland Oy Low passive intermodulation distributed antenna system for multiple-input multiple-output systems and methods of use
JP6442766B2 (ja) 2014-12-11 2018-12-26 富士通コネクテッドテクノロジーズ株式会社 無線通信装置、無線通信方法、及び無線通信プログラム
KR102324960B1 (ko) 2015-06-25 2021-11-12 삼성전자 주식회사 통신 장치 및 이를 포함하는 전자 장치
US9906260B2 (en) 2015-07-30 2018-02-27 Pulse Finland Oy Sensor-based closed loop antenna swapping apparatus and methods
JP2020005185A (ja) * 2018-06-29 2020-01-09 ルネサスエレクトロニクス株式会社 通信装置
CN113851845B (zh) * 2021-10-13 2024-01-26 中国信息通信研究院 一种抑制带内信号的集成滤波双工天线

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GB960280A (en) * 1961-06-07 1964-06-10 Marconi Co Ltd Improvements in or relating to variable reactance and like arrangements
US3733608A (en) * 1971-12-09 1973-05-15 Motorola Inc Circuit for coupling radio receiver and radio transmitter to a common antenna for duplex operation
IT1074089B (it) * 1976-12-16 1985-04-17 Sits Soc It Telecom Siemens Filtro passa-reiettabanda per sistemi di telecomunicazioni
US4426630A (en) * 1981-12-28 1984-01-17 Rockwell International Corporation Electronically tunable band reject filter
US4459571A (en) * 1982-12-20 1984-07-10 Motorola, Inc. Varactor-tuned helical resonator filter
FR2565438B1 (fr) * 1984-05-30 1989-09-22 Cepe Filtre dielectrique a frequence centrale variable.
US4682131A (en) * 1985-06-07 1987-07-21 Motorola Inc. High-Q RF filter with printed circuit board mounting temperature compensated and impedance matched helical resonators
US4662001A (en) * 1985-08-15 1987-04-28 Zenith Electronics Corporation Tunable notch filter for image frequency and conducted local oscillator leakage rejection
JPS6489709A (en) * 1987-09-30 1989-04-04 Toshiba Corp Band width variable circuit
US4799034A (en) * 1987-10-26 1989-01-17 General Instrument Corporation Varactor tunable coupled transmission line band reject filter
US5065453A (en) * 1989-03-20 1991-11-12 General Electric Company Electrically-tunable bandpass filter
GB2247125B (en) * 1990-08-16 1995-01-11 Technophone Ltd Tunable bandpass filter
US5107233A (en) * 1990-10-15 1992-04-21 Hewlett-Packard Company Amplitude correction of field coupled varactor tuned filters
FI110148B (sv) * 1993-09-10 2002-11-29 Filtronic Lk Oy Radiofrekvensfilter bestående av flera resonatorer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5717368A (en) * 1993-09-10 1998-02-10 Lk-Products Oy Varactor tuned helical resonator for use with duplex filter

Also Published As

Publication number Publication date
EP0643481B1 (en) 2002-07-24
US5717368A (en) 1998-02-10
DE69431022T2 (de) 2003-03-13
FI933988A0 (fi) 1993-09-10
EP0643481A1 (en) 1995-03-15
JPH07170204A (ja) 1995-07-04
FI110148B (sv) 2002-11-29
DE69431022D1 (de) 2002-08-29

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