EP2920840A1 - Filtre de coupure de haute fréquence - Google Patents

Filtre de coupure de haute fréquence

Info

Publication number
EP2920840A1
EP2920840A1 EP13792597.0A EP13792597A EP2920840A1 EP 2920840 A1 EP2920840 A1 EP 2920840A1 EP 13792597 A EP13792597 A EP 13792597A EP 2920840 A1 EP2920840 A1 EP 2920840A1
Authority
EP
European Patent Office
Prior art keywords
frequency
resonators
coupling
signal line
filter according
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.)
Granted
Application number
EP13792597.0A
Other languages
German (de)
English (en)
Other versions
EP2920840B1 (fr
Inventor
Wolfgang Haeupler
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.)
Kathrein Mobilcom Austria GmbH
Original Assignee
Kathrein Austria GmbH
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 Kathrein Austria GmbH filed Critical Kathrein Austria GmbH
Publication of EP2920840A1 publication Critical patent/EP2920840A1/fr
Application granted granted Critical
Publication of EP2920840B1 publication Critical patent/EP2920840B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • 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
    • H01P1/202—Coaxial filters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H01P7/04—Coaxial resonators

Definitions

  • a common antenna is often used for transmit and receive signals.
  • the transmit and receive signals each use different frequency ranges, and the antenna must be suitable for transmitting and receiving in both frequency ranges.
  • a suitable frequency filtering is required with which the transmit signals from the transmitter to the antenna and the reception signals from the antenna to the receiver are forwarded on the one hand.
  • high frequency filters in coaxial design are used today.
  • the so-called "digital dividend" in the 790-862 MHz band is available for mobile communications.
  • the frequency band of 791-821 MHz is used for the uplink, whereas the frequency band of 832-862 MHz is used for the downlink.
  • the invention thus comprises a signal line running through the high-frequency cutoff filter, which is provided with at least one or more galvanic separation points (corresponding to the number of resonators), wherein the resonators are arranged by means of one each at the separation point and with two free ends the connecting line connected coupling capacity are interconnected. It is therefore sometimes spoken of capacitive separation points.
  • the signal line thus comprises two galvanically separated line sections.
  • the input terminal and the output terminal are connected to one another by the coupling capacitance arranged between the line sections.
  • a correspondingly constructed high-frequency filter is particularly simple in its construction.
  • the coupling surfaces of the respective line sections can be parallel to the longitudinal extent of the high-frequency filter and parallel to the vertical extent of the respective inner conductors of the resonator. be aligned. This makes the geometry of a correspondingly constructed high-frequency filter particularly simple.
  • the size of the respective coupling surfaces of the respective line sections can be adapted very simply by simply exchanging the corresponding line sections, the line sections having large coupling surfaces adapted to their requirements at their respective ends.
  • the line sections are offset parallel to each other and the first coupling surfaces and the second coupling surfaces arranged offset parallel to each other. As a result, the positioning of the respective coupling surfaces with each other is particularly easy. Furthermore, the distance of the coupling surfaces to each other is easily adjustable.
  • the high-frequency filter further comprises a holding and / or on imme issued which is supported on the inner conductor and / or attachable to the inner conductor and has two pocket-shaped receiving spaces, which are separated by a partition wall.
  • the first coupling surface is arranged in a first receiving space of the holding and / or receiving means
  • the second Coupling surface is arranged in a second receiving space of the holding and / or receiving device.
  • the 1 to 8 comprises six resonators 10, which are separated from each other by partitions 14.
  • the six resonators 10 each comprise an inner conductor 16, wherein the inner conductors 16 are each electrically connected to the housing bottom 11 and extend perpendicularly from the housing bottom 11 in the direction of the housing cover 12.
  • the outer conductor housing may be formed in one piece with the inner conductors 16, for example as a milling, turning or casting part.
  • the holding and / or receiving device 70 has two receiving spaces 72, 73, which are separated from one another by a partition wall 71.
  • the first coupling surface 52.1 of the line section 52 is arranged in a first receiving space 72 of the holding and / or receiving device 70
  • the second coupling surface 53.2 of the line section 53 is arranged in a second receiving space 73 of the holding and / or receiving device 70.
  • the line sections 51, 52, 53, 54 are each arranged in the region of the upper free ends 16 a of the corresponding inner conductor 16. It can be seen from the drawings that extend the line sections with their parallel to the inner conductor height sections then also from the upper free end 16a of the inner conductor 16, starting over a certain vertical distance parallel to the inner conductor 16 down toward housing bottom 11, but preferably only in a range of not more than 10% or 20% or up to 30% of the axial length of the inner conductor 16. In this height range with respect to the inner conductor 16 then the recesses or openings 14a mentioned at the partition walls 14 are then excluded. forms, over which the connecting line runs at the same height or at the same distance from the housing cover 12 and the housing bottom.
  • the mutual coupling of the resonators 10 used in the notch filter is not effected by a direct coupling between the resonators, but only via the signal line 50. Therefore, no otherwise conventional coupling window or coupling diaphragms are provided between the individual resonators.
  • the coupling of the resonators via the signal line 50 is preferably carried out in each case in the correct phase, e.g. through the capacitive coupling.
  • the individual Sperrpolfrequenzen can be detuned or changed without affecting the remaining locking poles.
  • the explained inventive construction of the high-frequency cut filter usually includes a plurality of coaxial resonators 10, wherein adjacent and z. B. capacitive coupled to the inner conductor 10 of these resonators, the signal line 50 between two terminals 20, 30, 40 extends.
  • E-GSM signals used in mobile radio use the frequency range from 880 to 915 MHz for the so-called uplink and the frequency range from 925 to 960 MHz for the so-called downlink.
  • the transmitter operates in the frequency range 880-915 MHz.
  • the duplexer 1 is then designed such that the three resonators 10 between the input terminal 20 and the transmitting / receiving terminal 40 are designed in size and geometry such that these three coupled resonators 10 pass signals in the frequency range from 880 to 915 MHz, however, strongly attenuate signals in the frequency range of 925 to 960 MHz.
  • Signals received by the antenna in the range of 925 to 960 MHz are fed to the duplex switch 1 via the transmission / reception port 40. These signals are forwarded via the three resonators 10 between the transmit / receive port 40 and the output port 30 to the receiver. However, these signals are so much attenuated by the three resonators between the transmitting / receiving port 40 and the input port 20 that they do not reach the transmitter via the input port 20.
  • FIG. 9 shows an equivalent circuit diagram of a high-frequency blocking filter according to the invention with a continuous signal line 50 (and the coupling capacitance 60 connected in the continuous signal line 50), which has only two resonators 10 which are capacitively connected to one another via a coupling capacitance 60.
  • a corresponding high-frequency blocking filter 1 or a corresponding duplexer 1 has narrower blocking regions for the uplink and downlink, since only one resonator 10 is provided for the uplink and the downlink.
  • the remaining mode of operation of the high-frequency blocking filter 1 shown in FIG. 9 is identical to the mode of operation of the high-frequency blocking filter 1 described with reference to FIGS. 1 to 8 and 10.
  • the useful signal is transmitted via the connecting line 50 from one input to one output, wherein in the context of the invention, the connecting line is additionally capacitively coupled by approaching the resonators 10, ie to the inner conductor 16.
  • the galvanic isolation points in the form of the capacitive separation points provided in the context of the connection lead to a virtual shortening of the entire length of the connection line 50, as a result of which the high-frequency cutoff filter is comparatively small even at low high frequencies.
  • the line length between two resonators 10 would be approximately K / 2. In the context of the invention, this line route is significantly shorter.
  • the desired blocking poles which are located outside the transmission frequency range, then arise in the case of in-phase coupling.
  • the in-phase blocking-pole coupling can be set correspondingly by an optimized combination between the individual line lengths between the capacitive separating points and the size of the capacitances at the separating points themselves.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

L'invention concerne un filtre de coupure de haute fréquence amélioré, présentant les caractéristiques suivantes : le filtre de coupure de haute fréquence (1) comprend un raccord d'entrée (20, 40) et un raccord de sortie (30, 40), la ligne de signal (50) étant raccordée galvaniquement ou couplée capacitivement au raccord d'entrée (20, 40) d'un part et au raccord de sortie (30, 40) d'autre part. La ligne de signal (50) s'étend, en formant un couplage capacitif respectivement de conducteur interne et/ou de résonateur (65), le long de la ligne interne (16) en question, au travers des résonateurs (10) du filtre de coupure de haute fréquence (1). La ligne de signal (50) présente au moins un point de coupure galvanique sous forme d'un point de coupure capacitif (60'), le point de coupure capacitif (60') est espacé des lignes internes (16) et est couplé capacitivement à celles-ci, les résonateurs (10) ou les lignes internes (16) sont respectivement couplés capacitivement à la ligne de signal (50).
EP13792597.0A 2012-11-15 2013-11-14 Filtre de coupure de haute fréquence Not-in-force EP2920840B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012022433.8A DE102012022433A1 (de) 2012-11-15 2012-11-15 Hochfrequenzfilter
PCT/EP2013/003438 WO2014075805A1 (fr) 2012-11-15 2013-11-14 Filtre de coupure de haute fréquence

Publications (2)

Publication Number Publication Date
EP2920840A1 true EP2920840A1 (fr) 2015-09-23
EP2920840B1 EP2920840B1 (fr) 2016-10-05

Family

ID=49619873

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13792597.0A Not-in-force EP2920840B1 (fr) 2012-11-15 2013-11-14 Filtre de coupure de haute fréquence

Country Status (4)

Country Link
US (1) US9923254B2 (fr)
EP (1) EP2920840B1 (fr)
DE (1) DE102012022433A1 (fr)
WO (1) WO2014075805A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112768862A (zh) * 2020-12-30 2021-05-07 罗森伯格技术有限公司 耦合结构、合路器、双工器以及滤波器

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4276525A (en) * 1977-12-14 1981-06-30 Murata Manufacturing Co., Ltd. Coaxial resonator with projecting terminal portion and electrical filter employing a coaxial resonator of that type
JPS5535560A (en) * 1978-09-04 1980-03-12 Matsushita Electric Ind Co Ltd Coaxial type filter
GB2234399B (en) 1989-06-21 1993-12-15 Murata Manufacturing Co Dielectric filter
FI911798A (fi) * 1991-04-12 1992-10-13 Lk Products Oy Keramisk filterkonstruktion
DE69323660T2 (de) 1992-06-26 1999-10-21 Sanyo Electric Co., Ltd. Koaxialer Resonator und dielektrisches Filter mit einem derartigen Resonator
US5329687A (en) * 1992-10-30 1994-07-19 Teledyne Industries, Inc. Method of forming a filter with integrally formed resonators
JPH098506A (ja) 1995-06-21 1997-01-10 Matsushita Electric Ind Co Ltd 帯域阻止フィルタ
JPH1065467A (ja) 1996-08-22 1998-03-06 Matsushita Electric Ind Co Ltd フィルタ付き低雑音増幅器
FI113578B (fi) * 1999-03-03 2004-05-14 Filtronic Lk Oy Resonaattorisuodatin
DE102004045006B4 (de) 2004-09-16 2006-09-28 Kathrein-Austria Ges.M.B.H. Hochfrequenzfilter
JP4395100B2 (ja) * 2005-05-25 2010-01-06 八木アンテナ株式会社 Ｔｅｍモード誘電体フィルタ

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2014075805A1 *

Also Published As

Publication number Publication date
WO2014075805A1 (fr) 2014-05-22
US20150303543A1 (en) 2015-10-22
EP2920840B1 (fr) 2016-10-05
DE102012022433A1 (de) 2014-05-15
US9923254B2 (en) 2018-03-20

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