EP1544938A1 - Mehrkammerfilter - Google Patents

Mehrkammerfilter Download PDF

Info

Publication number
EP1544938A1
EP1544938A1 EP04029980A EP04029980A EP1544938A1 EP 1544938 A1 EP1544938 A1 EP 1544938A1 EP 04029980 A EP04029980 A EP 04029980A EP 04029980 A EP04029980 A EP 04029980A EP 1544938 A1 EP1544938 A1 EP 1544938A1
Authority
EP
European Patent Office
Prior art keywords
filter
body housing
multiple cavity
functionality
triplexer
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
EP04029980A
Other languages
English (en)
French (fr)
Inventor
Niels Broholm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alcatel Lucent SAS
Original Assignee
Alcatel CIT SA
Alcatel SA
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
Priority claimed from EP03029337A external-priority patent/EP1544940A1/de
Application filed by Alcatel CIT SA, Alcatel SA filed Critical Alcatel CIT SA
Priority to EP04029980A priority Critical patent/EP1544938A1/de
Publication of EP1544938A1 publication Critical patent/EP1544938A1/de
Ceased legal-status Critical Current

Links

Images

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
    • H01P1/201—Filters for transverse electromagnetic waves
    • H01P1/205—Comb or interdigital filters; Cascaded coaxial cavities
    • H01P1/2053—Comb or interdigital filters; Cascaded coaxial cavities the coaxial cavity resonators being disposed parall to each other

Definitions

  • the present invention relates generally to multiple cavity filters, and more particularly to a multiple cavity filter made of a polymeric material.
  • filters are used today in base stations for mobile telephony. Often these filters are formed from central conductors placed inside a cavity or a number of cavities known as coaxial cavity resonators. The walls of this cavity or cavities are conductive and usually formed by the inner surface of a filter-casing.
  • a broadband filter comprising resonators having slightly different tuning frequencies in comb-line filters is disclosed in US Patent 5,963,854 for tower mounted amplifier (TMA) applications.
  • TMA tower mounted amplifier
  • RF radio frequency
  • Such filters used for amplifier or transceiver applications in mobile communication systems, are part of a greater system structure in which a plurality of electronic circuits and filters are interconnected in order to obtain the desired overall system functionality.
  • a conventional transceiver system is described which comprises receiving and transmitting filters connected to a plurality of other electronic equipment such as switches, high-frequency amplifiers, mixers, modulators, power amplifiers, etc.
  • These transceiver systems occupy a lot of space because the RF components and the direct current (DC) supply components are implemented separately and the different electronic RF and DC equipment connected with coaxial and DC cables.
  • a multiple cavity filter for use in tower mounted amplifier and transceiver front end applications comprising a duplexer or triplexer filter functionality implemented by means of coaxial resonator cavities
  • the filter body housing is made of a thermoplastic material
  • the filter body housing is designed so that on a first side, the side of the multiple cavity filters, it provides at least an extra duplexer or triplexer filter functionality
  • the filter body housing is further designed so that on a second side, opposite to the side of the filter cavities, it provides at least two compartments separated by shielding walls for placement of a plurality of digital electronic circuitry for the more than one duplexer or triplexer filter functionality and system functioning monitoring
  • the filter body housing is plated with an electrical conductive material.
  • a method for manufacturing a multiple cavity filter comprising the steps of: molding a filter body housing in thermoplastic material, the body housing having on a first side cavities implementing at least a double duplexer or triplexer filter functionality, and on a second side, opposite to the filter cavities, having at least two compartments separated by shielding walls for placement of a plurality of digital electronic circuitry for the more than one duplexer or triplexer filter functionality and system monitoring; coating the filter body housing with an electrical conductive material; and fitting a trimming plate and a shielding cover to cover the body housing.
  • Fig. 1A, B show a simplified block diagram of a TMA comprising a multiple cavity filter according to the invention.
  • Fig. 2 shows a simplified block diagram of a transceiver front end (TFE) comprising a multiple cavity filter according to the invention.
  • Fig. 3 A, B show a perspective sectional top and back view of an exemplary embodiment of a multiple cavity filter according to the present invention.
  • Fig. 4 shows a sectional side view of an exemplary embodiment of a multiple cavity filter according to the invention.
  • Fig. 5 A, B show a perspective partial view of an exemplary embodiment of a multiple cavity filter with connectors mounted onto the housing according to the invention.
  • FIG. 1A shows a simplified block diagram of a TMA 10 comprising, in the signal reception path, two reception filters RXF1 and RXF2 connected to a low noise amplifier LNA and, in the transmission path, a transmission filter TXF.
  • the receive and transmission paths are combined in two output/input ports, one port AP for connection with a Tx/Rx antenna arrangement ANT, and another port BP for connection with a mobile base station (not shown).
  • FIG 1B shows a typical duplex arrangement of a TMA 10. It is a paired configuration in which the functions are doubled.
  • the TMA filter 1 comprises in this case a doubled triplexer filter functionality. Triple arrangements or any other multiple of the basic arrangement shown in figure 1A are also possible.
  • the TMA 10 comprises further digital electronic circuitry, such as DC supplies, Bias Tee circuits and switches, which is not shown in Figure 1, in order to develop the desired system function. It is also possible that the TMA 10 comprises also a digital control unit in order to monitor the functioning and performance of the whole TMA system and generate alarms in case of malfunction. A communication link and communication protocol unit or modem may also be incorporated for communication with the base station. All this electronic circuitry is coupled and placed on the TMA multiple cavity filter 1 according to the invention.
  • FIG. 2 shows a simplified block diagram of a transceiver front end (TFE) in a duplex arrangement, with two RF modules M1 and M2 connected to a control and DC unit CDC.
  • Each RF module M1, M2 comprises a Voltage Standing Wave Ratio (VSWR) detector VD, a Bias-Tee circuit BT, a duplexer filter functionality DT which is implemented with a multiple cavity filter according to the invention, two reception and transmission low pass filters RX LPF and TX LPF, a low noise amplifier LNA, power dividers PD and connections to an antenna and other base station systems.
  • VSWR Voltage Standing Wave Ratio
  • the control and DC unit CDC is in charge, for example, of controlling and monitoring the functionality of the VSWR detectors VD and the Bias-Tee circuits BT, providing DC/DC conversion and DC-supply functionality DCM, and signaling and interfacing means TSI, DEI between the TFE and another base station systems.
  • FIG 3A shows a perspective sectional top view of an exemplary embodiment of a filter 1 according to the present invention.
  • the filter 1 is a coaxial cavity filter which implements a double triplexer filter functionality T1 and T2.
  • T1 and T2 For the sake of simplification we will explain here only one triplexer functionality T1, that is, implementation of two signal reception path filters RF1, RF2 and one transmission path filter TF.
  • the cavities are manufactured by moulding a filter body housing 2 in thermoplastic material. Customizable material properties, such as coefficient of thermal expansion and heat conductivity is achievable by controlling the content of glass-, mineral-fillers and additives of the thermoplastic material.
  • the polymer filter is then coated with an electrical conductive material, such as for example copper or silver-plating.
  • the plating process is usually made by electro-deposited silver on top of a thin layer of chemical copper and electrolytic copper.
  • the triplexer filter T1 of Figure 3A has two common resonators CR1, CR2 for the reception and transmission signal filter paths and the cavities implementing the reception and transmission filters RF1, RF2, TF are not aligned in a straight form in order to save space.
  • the housing comprises two coupling openings Ci, Co for coupling the filter functionality to other electronic digital functionality, RF and DC electronic circuitry, located at the back side of the filter housing 2, that is, on the side opposite to the cavities shown in Figure 3B.
  • the back side of the filter body housing 2 is designed so that it provides cavities or compartments C1 to C3 to mount said RF and DC electronic circuitry, e.g. DC supplies, reception and transmission combiners, Bias Tee circuits, low noise amplifiers, etc. directly on the filter body housing 2. It is also possible that said electronic circuitry is implemented on a printed circuit board (PCB) and placed on the body housing 2.
  • PCB printed circuit board
  • the back side of the body housing 2 is further designed so that it allows the integration of such RF and DC electronic circuitry in a single PCB, avoiding having several PCB circuits connected with DC and coaxial cables as it is seen in another TFE or TMA systems.
  • the different RF and DC electronic circuits are shielded by means of shielding walls SW molded on the filter body housing 2.
  • a common DC supply and a monitoring digital control unit for the two triplexer filters T1 and T2 could be implemented, on a second compartment C2 a low noise amplifier and a reception combiner for the first triplexer T1 could be located and in a third compartment C3 a bias tee and a VSWR detector circuit could be placed.
  • These circuits would be shielded with a plurality of shielding walls in order to avoid interferences between them.
  • the back side of the body housing 2 can be completely plated or at least the shielding walls in order to effectively isolate the compartments.
  • FIG. 4 shows a sectional side view of an exemplary embodiment of a multiple cavity filter 1.
  • the filter body housing 2 is molded, according to the invention, so that on one side S1 it provides multiple cavity filter functionality e.g. duplexer or triplexer filter functionality, and on a second side S2, opposite to the side of the filter cavities S1, it provides at least two compartments C1, C2 separated by shielding walls SW for placement of a plurality of digital electronic circuitry on the surface 6 of said filter body housing side S2.
  • the shielding walls integrated in the moulded filter housing prevent the RF signals to interfere with the digital electronic circuits.
  • a coupling rod 7 is used for coupling the filter functionality to the electronic digital functionality (RF and DC electronic circuitry) through a hole or coupling opening in the filter cavity.
  • a shielding cover 8 is provided over the side S2 of the body housing in which the electronic circuitry is placed in order to avoid electro-magnetical interference.
  • the multiple cavity filter 1 comprises also a trimming plate 4 or cover of the body housing 2 multiple cavity filter functionality side S1 can be either manufactured in coated/plated aluminum or moulded in the same thermoplastic material as the filter body 2 and then coated.
  • the conventional aluminum trimming plate is normally secured to the filter body by mounting self tapping or self cutting screws into the filter body. If the trimming plate is made in thermoplastic, it can be joined to the filter body 2 by several methods as e.g. reflow soldering, conductive glue, laser welding, heat staking or ultrasonic welding.
  • each of the cavity resonators there is a thread in which a tuning screw 5 is mounted.
  • the filter is tuned to its frequency, attenuation specs, return loss and insertion loss.
  • the position of the screw is correct, it is secured by means of a counter nut.
  • Figures 5 A and B show a perspective partial view of an exemplary multiple cavity filter 1 with connectors 3 mounted onto the housing 2 according to the invention.
  • the inner filter cavity resonators are coupled to external devices, for example an antenna, by means of a coaxial connector 3 mounted onto the housing 2 of the multiple cavity filter 1.
  • the coaxial connectors 3 are mounted on the multiple cavity filter housing 2 by means of screws or by press-fit.
  • the multiple cavity filter housing 2 can be moulded together with the connectors 3, as shown in figure 5B, so that the connectors 3 constitute an integrated part of the filter housing 2.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Transceivers (AREA)
EP04029980A 2003-12-19 2004-12-17 Mehrkammerfilter Ceased EP1544938A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04029980A EP1544938A1 (de) 2003-12-19 2004-12-17 Mehrkammerfilter

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP03029337A EP1544940A1 (de) 2003-12-19 2003-12-19 Turmartig montierter Verstärkerfilter und Herstellungverfahren dafür
EP03029337 2003-12-19
EP04029980A EP1544938A1 (de) 2003-12-19 2004-12-17 Mehrkammerfilter

Publications (1)

Publication Number Publication Date
EP1544938A1 true EP1544938A1 (de) 2005-06-22

Family

ID=34524726

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04029980A Ceased EP1544938A1 (de) 2003-12-19 2004-12-17 Mehrkammerfilter

Country Status (1)

Country Link
EP (1) EP1544938A1 (de)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008060012A1 (en) * 2006-11-13 2008-05-22 Kmw Inc. Radio frequency filter
EP2030377A2 (de) * 2006-06-16 2009-03-04 AT&T Mobility II LLC Mehrband-hf-kombinator
WO2009148525A1 (en) 2008-06-04 2009-12-10 Alcatel-Lucent Usa Inc. Light-weight low-thermal-expansion polymer foam for radiofrequency filtering applications
US7764245B2 (en) 2006-06-16 2010-07-27 Cingular Wireless Ii, Llc Multi-band antenna
EP2221910A1 (de) * 2009-02-13 2010-08-25 Huawei Technologies Co., Ltd. Basisstations-HF-Duplexer, HF-Modul und HF-Systemfeld
US7884775B1 (en) 2006-06-16 2011-02-08 At&T Mobility Ii Llc Multi-resonant microstrip dipole antenna
CN101976751A (zh) * 2010-04-12 2011-02-16 深圳市大富科技股份有限公司 腔体滤波器及其制造方法
WO2011061211A1 (en) * 2009-11-18 2011-05-26 Dsm Ip Assets B.V. Rf filter housing
US8452248B2 (en) 2006-06-16 2013-05-28 At&T Mobility Ii Llc Multi-band RF combiner
KR20140026235A (ko) * 2012-08-23 2014-03-05 주식회사 케이엠더블유 캐비티 구조를 가진 무선 주파수 필터
WO2014099187A1 (en) * 2012-12-20 2014-06-26 Dow Global Technologies Llc Polymer composite components for wireless-communication towers
WO2016135327A1 (de) * 2015-02-27 2016-09-01 Kathrein-Austria Ges.M.B.H Hochfrequenzfilter in cavity bauweise
CN107104697A (zh) * 2017-03-06 2017-08-29 上海乾视通信技术有限公司 一种多频通信本安基站
EP3296433A1 (de) * 2012-03-21 2018-03-21 Intel Corporation Leichte hohlraumfilter- und funksubsystemstrukturen
WO2018059345A1 (zh) * 2016-09-29 2018-04-05 华为技术有限公司 用于合路rru信号的tma、方法和铁塔站点
WO2020109606A1 (en) * 2018-11-30 2020-06-04 Kathrein Se Mobile radio antenna for connection to at least one mobile base station
US11289785B2 (en) 2019-07-31 2022-03-29 Commscope Technologies Llc Phasing line holders

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4278957A (en) * 1979-07-16 1981-07-14 Motorola, Inc. UHF Filter assembly
US5329687A (en) * 1992-10-30 1994-07-19 Teledyne Industries, Inc. Method of forming a filter with integrally formed resonators
US5428325A (en) * 1993-12-10 1995-06-27 Allen Telecom Group, Inc. RF filters and multiplexers with resonator decouplers
US20020053956A1 (en) * 2000-03-03 2002-05-09 Uno Henningsson Apparatus for improving communication systems

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4278957A (en) * 1979-07-16 1981-07-14 Motorola, Inc. UHF Filter assembly
US5329687A (en) * 1992-10-30 1994-07-19 Teledyne Industries, Inc. Method of forming a filter with integrally formed resonators
US5428325A (en) * 1993-12-10 1995-06-27 Allen Telecom Group, Inc. RF filters and multiplexers with resonator decouplers
US20020053956A1 (en) * 2000-03-03 2002-05-09 Uno Henningsson Apparatus for improving communication systems

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7884775B1 (en) 2006-06-16 2011-02-08 At&T Mobility Ii Llc Multi-resonant microstrip dipole antenna
EP2030377A2 (de) * 2006-06-16 2009-03-04 AT&T Mobility II LLC Mehrband-hf-kombinator
EP2030377A4 (de) * 2006-06-16 2009-11-18 At & T Mobility Ii Llc Mehrband-hf-kombinator
US7764245B2 (en) 2006-06-16 2010-07-27 Cingular Wireless Ii, Llc Multi-band antenna
US8452248B2 (en) 2006-06-16 2013-05-28 At&T Mobility Ii Llc Multi-band RF combiner
US8072298B2 (en) 2006-11-13 2011-12-06 Kmw Inc. Radio frequency filter
WO2008060012A1 (en) * 2006-11-13 2008-05-22 Kmw Inc. Radio frequency filter
US7847658B2 (en) 2008-06-04 2010-12-07 Alcatel-Lucent Usa Inc. Light-weight low-thermal-expansion polymer foam for radiofrequency filtering applications
CN102046710B (zh) * 2008-06-04 2013-11-06 阿尔卡特朗讯美国公司 用于射频滤波应用的轻重量低热膨胀的聚合物泡沫
CN102046710A (zh) * 2008-06-04 2011-05-04 阿尔卡特朗讯美国公司 用于射频滤波应用的轻重量低热膨胀的聚合物泡沫
KR101208939B1 (ko) 2008-06-04 2012-12-07 알카텔-루센트 유에스에이 인코포레이티드 무선주파수 필터링 용례들을 위한 경량 저 열팽창 폴리머 발포체
JP2011523788A (ja) * 2008-06-04 2011-08-18 アルカテル−ルーセント ユーエスエー インコーポレーテッド 無線周波フィルタリング用途向けの軽量低熱膨張ポリマー発泡体
WO2009148525A1 (en) 2008-06-04 2009-12-10 Alcatel-Lucent Usa Inc. Light-weight low-thermal-expansion polymer foam for radiofrequency filtering applications
EP2221910A1 (de) * 2009-02-13 2010-08-25 Huawei Technologies Co., Ltd. Basisstations-HF-Duplexer, HF-Modul und HF-Systemfeld
EP2797162A1 (de) * 2009-02-13 2014-10-29 Huawei Technologies Co., Ltd. Basisstations-HF-Duplexer, HF-Modul und HF-Systemfeld
US8947174B2 (en) 2009-02-13 2015-02-03 Huawei Technologies Co., Ltd. Base station RF duplexer, RF module, and RF system
WO2011061211A1 (en) * 2009-11-18 2011-05-26 Dsm Ip Assets B.V. Rf filter housing
US9203130B2 (en) 2009-11-18 2015-12-01 Dsm Ip Assets B.V. RF filter housing
CN101976751A (zh) * 2010-04-12 2011-02-16 深圳市大富科技股份有限公司 腔体滤波器及其制造方法
EP3296433A1 (de) * 2012-03-21 2018-03-21 Intel Corporation Leichte hohlraumfilter- und funksubsystemstrukturen
KR20140026235A (ko) * 2012-08-23 2014-03-05 주식회사 케이엠더블유 캐비티 구조를 가진 무선 주파수 필터
KR20150097521A (ko) * 2012-12-20 2015-08-26 다우 글로벌 테크놀로지스 엘엘씨 무선 통신탑을 위한 중합체 복합재 부품
CN104837931A (zh) * 2012-12-20 2015-08-12 陶氏环球技术有限责任公司 无线通信塔用的聚合物复合材料组件
JP2016513139A (ja) * 2012-12-20 2016-05-12 ダウ グローバル テクノロジーズ エルエルシー 無線通信塔のためのポリマー複合体構成部品
WO2014099187A1 (en) * 2012-12-20 2014-06-26 Dow Global Technologies Llc Polymer composite components for wireless-communication towers
US10287473B2 (en) 2012-12-20 2019-05-14 Dow Global Technologies Llc Polymer composite components for wireless-communication towers
WO2016135327A1 (de) * 2015-02-27 2016-09-01 Kathrein-Austria Ges.M.B.H Hochfrequenzfilter in cavity bauweise
WO2018059345A1 (zh) * 2016-09-29 2018-04-05 华为技术有限公司 用于合路rru信号的tma、方法和铁塔站点
CN107104697A (zh) * 2017-03-06 2017-08-29 上海乾视通信技术有限公司 一种多频通信本安基站
CN107104697B (zh) * 2017-03-06 2019-07-12 上海乾视通信技术有限公司 一种多频通信本安基站
WO2020109606A1 (en) * 2018-11-30 2020-06-04 Kathrein Se Mobile radio antenna for connection to at least one mobile base station
US12015206B2 (en) 2018-11-30 2024-06-18 Telefonaktiebolaget Lm Ericsson (Publ) Mobile radio antenna for connection to at least one mobile base station
US11289785B2 (en) 2019-07-31 2022-03-29 Commscope Technologies Llc Phasing line holders

Similar Documents

Publication Publication Date Title
EP1544938A1 (de) Mehrkammerfilter
US7474173B2 (en) Cross-polar and co-polar transceiver
CN108808224B (zh) Massive mimo天线
US6919782B2 (en) Filter structure including circuit board
US9559659B2 (en) Tunable filter systems, devices, and methods
FI102121B (fi) Radiotietoliikenteen lähetin/vastaanotin
US7127269B2 (en) Front-end module for multi-band and multi-mode wireless network system
US5045824A (en) Dielectric filter construction
US12068515B2 (en) Cavity filter comprising an elastically deformable terminal portion, where a first side terminal is inserted into a housing of a second side terminal of the terminal portion
CN109494489B (zh) 滤波集成式基站天线
US20100203922A1 (en) Time Division Duplex Front End Module
EP2979323A1 (de) Siw-antennenanordnung
US10911015B2 (en) Electromagnetic tunable filter systems, devices, and methods in a wireless communication network for supporting multiple frequency bands
US20030027530A1 (en) Highly integrated planar stacked millimeter wave transceiver
WO2003079565A1 (en) Millimeter wave (mmw) radio frequency transceiver module and method of forming same
EP1544940A1 (de) Turmartig montierter Verstärkerfilter und Herstellungverfahren dafür
WO2003023987A1 (en) Transceiver assembly
EP3568913A1 (de) Abstimmbare filtersysteme, vorrichtungen und verfahren
FI118934B (fi) Liuskajohtosuodatinlaite
CN116469876A (zh) 一种封装天线装置和无线通信装置
WO2022153926A1 (ja) 高周波回路および通信装置
KR100946178B1 (ko) 알에프 커넥터
KR100550782B1 (ko) 듀얼 밴드 프런트 엔드 모듈
EP1551106B1 (de) RF-Modul für ein Mobilkommunikationsendgerät
KR20080044044A (ko) 스위치 프론트 엔드 모듈

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR LV MK YU

17P Request for examination filed

Effective date: 20050601

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ALCATEL LUCENT

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 20070525