EP0633621A1 - Filtre-combineur pour antenne - Google Patents

Filtre-combineur pour antenne Download PDF

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Publication number
EP0633621A1
EP0633621A1 EP94110380A EP94110380A EP0633621A1 EP 0633621 A1 EP0633621 A1 EP 0633621A1 EP 94110380 A EP94110380 A EP 94110380A EP 94110380 A EP94110380 A EP 94110380A EP 0633621 A1 EP0633621 A1 EP 0633621A1
Authority
EP
European Patent Office
Prior art keywords
antenna
waveguide
combiner according
filters
crossover
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
EP94110380A
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German (de)
English (en)
Other versions
EP0633621B1 (fr
Inventor
Gerhard Dr. Pfitzenmaier
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP0633621A1 publication Critical patent/EP0633621A1/fr
Application granted granted Critical
Publication of EP0633621B1 publication Critical patent/EP0633621B1/fr
Anticipated expiration legal-status Critical
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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
    • H01P1/213—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies
    • H01P1/2138—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies using hollow waveguide filters

Definitions

  • the invention relates to an antenna filter combiner for connecting a plurality of frequency channels to a transmitting antenna.
  • high-Q resonators can be regarded as particularly inexpensive for the implementation of low-loss transmission filters.
  • their spatial extension allows the electrically ideal interconnection of the transmission filters, which is desired in the sense of a crossover, directly and point-wise at their outputs only with sometimes considerable disturbances.
  • Waveguide branching switches such as those from the article "Computer-Aided Design of Waveguide Multiplexers" by A.E. Atia, published in “IEEE Transactions on Microwave Theory and Techniques", March 1974, pages 332 to 336, have proven themselves in satellite and directional radio technology.
  • the partial filters are coupled to a waveguide that is short-circuited at the end, but the distances between the coupling planes of the filters depend on their frequency positions, are therefore electrically significant and would also have to assume different values when the filter is retuned.
  • the waveguide dimensions for the mobile radio systems currently located at 0.9 GHz and 1.8 GHz are relatively large and do not allow a compact switch structure.
  • the channel switch chains with circulators which are particularly used in directional radio technology, such as those from the article "Channel Branching Filters for Wideband Radio Relay Systems” by G. Ensslin, H. Herder, R. Schuster, appeared in telcom-report 10 (1987), Special "Radio Communication", Pages 146 to 151 are known, offer good options for modular construction. Because of the relatively large number of circulators - each filter has to be assigned a circulator - for each individual frequency channel, due to the mechanical arrangement in the channel switch chain, on the one hand there are many circulator runs and thus high attenuations, and on the other hand high costs for the circulators, so that they too Solution cannot be regarded as optimal for mobile radio purposes.
  • the invention has for its object to provide a solution for a simple structure with low-loss transmission filters for an antenna filter combiner of the type described above.
  • FIG. 1 shows a modularly constructed antenna filter combiner for the non-reactive combination of maximum n ⁇ m transmission frequency channels in the block diagram.
  • the signal flow direction of the circulators Z is used so that the frequency channels already fed in in the course of the waveguide W1 at locally located circulators 1 ...
  • ( ⁇ -1) are at least approximately totally reflected at the crossover of the ⁇ .circulator and possibly connected to crossovers via further ones Circulators ( ⁇ + 1) ... n in the direction of the antenna Ant.
  • the waveguide W1 is terminated at its end in front of the first circulator Z1 with the resistor R with the correct wave resistance.
  • the ⁇ > 2 sub-filters TF of each frequency which FW are advantageously constructed from high-Q resonators, e.g. Coaxial resonators, helix resonators, hollow tube resonators, dielectric resonators, HTSL resonators. If the physical requirements are met, the resonators can be operated with two or more modes, e.g. orthogonal modes in the hollow tube or dielectric resonator.
  • high-Q resonators e.g. Coaxial resonators, helix resonators, hollow tube resonators, dielectric resonators, HTSL resonators.
  • the ⁇ sub-filters TF are concentric and, with respect to the resonator axes, are arranged parallel to the axis around a second waveguide W2 forming the apex of the crossover.
  • the other end of the second waveguide W2 is prepared or configured as a connector so that a direct, optimally short connection to the third port of a circulator Z connected to the first waveguide W1 is possible.
  • the second waveguide W2 consists of a modified coaxial line. A more detailed design of the arrangement is shown in FIGS. 6 and 7 and will be explained in more detail later in connection with this description of the figures.
  • two partial filters TF1, TF2 are provided, which in one case run with their central axes in one plane with the inner conductor of the central coaxial line arranged between them (second waveguide W2), while in the other case the second waveguide W2 is arranged symmetrically to the two sub-filters outside the plane mentioned.
  • the radius of the filter resonators is r
  • the radius of the outer conductor of the second waveguide is r K.
  • the resonators In the area directly opposite the second waveguide W2, the resonators have a filter coupling FA.
  • the electrically effective length from the filter coupling FA to the inner conductor of the second waveguide (crossover vertex WS) is designated by x.
  • x2 r K + s , where s is the material thickness between the filter resonator and the second waveguide W2.
  • the filter couplings are not shown in the illustrations in FIGS. 2 to 5.
  • Figures 6 and 7 show a three-channel crossover in the antenna filter combiner in two sectional views. This represents a particularly favorable solution with regard to economy and the electrically critical length of the filter outputs to the apex.
  • the 3-channel crossovers are implemented in such a way that in a metal block or a metallized plastic block three blind bores as resonator housing 1 are circumferentially symmetrical to a continuous central bore 3, which represents the outer conductor of a coaxial line forming the second waveguide, in such a way that the minimum wall thickness between the resonators each assumes a small, mechanically expedient value.
  • the dielectric resonators DR1, DR2, DR3 are each fixed centrally on thin-walled tube sections 5 made of a suitable microwave insulation material.
  • the conductors of the filter decouplings A1, A2, A3 run insulated through bores in the wall between the resonator housing 1 and the central bore 3 and form the physical apex of the crossover at the connection point WS with the inner conductor 4 of the central coaxial line.
  • the filter couplings E1, E2, E3 are offset by 90 ° relative to the couplings on the circumference of the resonator housing.
  • Asymmetry screws K1, K2, K3 are arranged at 135 ° to the filter coupling and decoupling, with which the bandwidth of the filter is set.
  • the central coaxial line has at one end a connection 6 for a circulator with the channels SK1, 2, 3, while on the other side as residual error compensation at the switch apex WS (connection point of the filter output lines and the inner conductor of the coaxial line), a coaxial line that is short-circuited at the end is continued without additional space requirement.
  • Their inner conductor 7 is designed to avoid temperature-related mechanical stresses at the end as a slightly bent wire 8 and connected to a cover 9 covering the entire switch unit, for example by clamping.
  • the two-circuit sub- filters of the crossover implemented in this case with dielectric resonators DR are operated with orthogonal HE 11 ⁇ modes.
  • the disturbances of the filter passing through are caused by the undesired transformation of the high-impedance input resistance of the respective blocking filter via the connecting lines between the filter outputs and largely balanced the second waveguide (switch vertex).
  • the manufacture of the housing of the switch assembly from a single metal block or metallized plastic block brings electrical advantages through short and defined connection paths and a minimal number of connection points. Mechanical advantages include a compact and space-saving design, the accommodation of the compensating means without additional space requirements and defined and low-tolerance connections.
  • the dielectric resonator operated with orthogonal modes as a highly selective two-circuit filter is particularly advantageous from the point of view of the high quality and climatic requirements, the desired compactness and the excellent economy in the crossovers of current mobile radio systems.
  • any sub-filter of the filter combiner to all agreed channel frequencies within the system frequency band is achieved without inadmissible deformation of the filter properties (e.g. due to serious quality losses or the occurrence of disturbance modes) in that the dielectric resonator DR is equipped with two resonators such as the half thickness (in the axial direction) and approximately with the same external dimensions, with at least one of the two resonator halves being defined, for example by means of a system-controlled stepper motor, which is designed to be displaceable in the axial direction and the strength of the air gap 10 between the two resonator halves ultimately determines the center frequency of the dual-circuit filter.
  • This displaceability is indicated in Figure 6 by the two-way arrow.

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EP94110380A 1993-07-08 1994-07-04 Filtre-combineur pour antenne Expired - Lifetime EP0633621B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4322843 1993-07-08
DE4322843 1993-07-08

Publications (2)

Publication Number Publication Date
EP0633621A1 true EP0633621A1 (fr) 1995-01-11
EP0633621B1 EP0633621B1 (fr) 1999-09-22

Family

ID=6492312

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94110380A Expired - Lifetime EP0633621B1 (fr) 1993-07-08 1994-07-04 Filtre-combineur pour antenne

Country Status (4)

Country Link
US (1) US5546057A (fr)
EP (1) EP0633621B1 (fr)
DE (1) DE59408762D1 (fr)
FI (1) FI943265A (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0955606A (ja) * 1995-08-11 1997-02-25 Fujitsu Ltd 無線装置用フィルタ装置並びに無線装置用フィルタ装置の誘電体配置用治具並びに治具を用いた無線装置用フィルタ装置の誘電体配置方法
US5881371A (en) * 1995-10-27 1999-03-09 Trimble Navigation Limited Antenna switching technique for improved data throughput in communication networks
US6252461B1 (en) 1997-08-25 2001-06-26 Frederick Herbert Raab Technique for wideband operation of power amplifiers
US6201949B1 (en) * 1998-05-22 2001-03-13 Rolf Kich Multiplexer/demultiplexer structures and methods
DE102004054370B3 (de) * 2004-11-10 2006-04-20 Siemens Ag Anordnung zum Anschalten von zumindest einer Sendeeinheit an eine Sende-Empfangsantenne
EP2124289A1 (fr) * 2008-05-20 2009-11-25 CommScope, Inc. of North Carolina Système résonateur
US11677128B2 (en) * 2020-06-04 2023-06-13 Raytheon Company Reconfigurable wideband high-frequency circuits using non-reciprocal circulators

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1158914A (fr) * 1956-09-28 1958-06-20 Sadir Carpentier Perfectionnements aux systèmes de couplage
DE973386C (de) * 1952-04-05 1960-02-04 Telefunken Gmbh Kopplungsanordnung fuer Hochfrequenzkreise
EP0262391A2 (fr) * 1986-09-29 1988-04-06 ANT Nachrichtentechnik GmbH Dispositif de branchement de plusieurs émetteurs et récepteurs à une antenne
DE4024480A1 (de) * 1990-08-02 1992-02-06 Ant Nachrichtentech Frequenzweiche
JPH0529806A (ja) * 1991-07-19 1993-02-05 Nec Corp 分波合成装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE974386C (de) * 1942-10-18 1960-12-08 Dehydag Gmbh Plastifizierungs- und Elastifizierungsmittel fuer Polyvinylchlorid
US3435358A (en) * 1966-06-08 1969-03-25 Anaconda Electronics Co Cable television amplifier powering
DE2213962C3 (de) * 1972-03-22 1979-01-18 Siemens Ag, 1000 Berlin Und 8000 Muenchen Funkfeld in einem Richtfunksystem

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE973386C (de) * 1952-04-05 1960-02-04 Telefunken Gmbh Kopplungsanordnung fuer Hochfrequenzkreise
FR1158914A (fr) * 1956-09-28 1958-06-20 Sadir Carpentier Perfectionnements aux systèmes de couplage
EP0262391A2 (fr) * 1986-09-29 1988-04-06 ANT Nachrichtentechnik GmbH Dispositif de branchement de plusieurs émetteurs et récepteurs à une antenne
DE4024480A1 (de) * 1990-08-02 1992-02-06 Ant Nachrichtentech Frequenzweiche
JPH0529806A (ja) * 1991-07-19 1993-02-05 Nec Corp 分波合成装置

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
15TH EUROPEAN MICROWAVE CONFERENCE-PROCEEDINGS 9-13 September 1985,Paris,FR MICROWAVE EXHIBITIONS AND PUBLISHERS LTD, Tunbridge Wells,GB,1985 *
19TH EUROPEAN MICROWAVE CONFERENCE-PROCEEDINGS 4-7 September 1989,London,GB MICROWAVE EXHIBITIONS AND PUBLISHERS LTD, Tunbridge Wells,GB,1989 *
D. DOUST ET AL.: "Satellite multiplexing using dielectric resonator filters", MICROWAVE JOURNAL, vol. 32, no. 12, December 1989 (1989-12-01), DEDHAM US, pages 93 - 106, XP000116631 *
PATENT ABSTRACTS OF JAPAN vol. 17, no. 313 (E - 1381) 15 June 1993 (1993-06-15) *

Also Published As

Publication number Publication date
DE59408762D1 (de) 1999-10-28
FI943265A0 (fi) 1994-07-08
US5546057A (en) 1996-08-13
EP0633621B1 (fr) 1999-09-22
FI943265A (fi) 1995-01-09

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