EP1155470A1 - Duplexeur/diplexeur forme de deux filtres a structure modulaire - Google Patents

Duplexeur/diplexeur forme de deux filtres a structure modulaire

Info

Publication number
EP1155470A1
EP1155470A1 EP00908936A EP00908936A EP1155470A1 EP 1155470 A1 EP1155470 A1 EP 1155470A1 EP 00908936 A EP00908936 A EP 00908936A EP 00908936 A EP00908936 A EP 00908936A EP 1155470 A1 EP1155470 A1 EP 1155470A1
Authority
EP
European Patent Office
Prior art keywords
duplexer
branches
diplexer
branch
filters
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.)
Withdrawn
Application number
EP00908936A
Other languages
German (de)
English (en)
Inventor
Christian Block
Bernhard Reichel
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.)
TDK Electronics AG
Original Assignee
Epcos AG
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 Epcos AG filed Critical Epcos AG
Publication of EP1155470A1 publication Critical patent/EP1155470A1/fr
Withdrawn legal-status Critical Current

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
    • H01P1/213—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies
    • H01P1/2136—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies using comb or interdigital filters; using cascaded coaxial cavities

Definitions

  • Duplexer / diplexer made of two modular filters
  • the present invention relates to a duplexer /
  • Diplexer consisting of at least two filters for a transmitting branch and a receiving branch, in which each filter consists of a ceramic body, in each of which holes are arranged which lead from one side of the respective ceramic body to the opposite side, and in each case on the ceramic body from one Metallization of the ceramic body insulated connection surfaces for three ports for capacitive coupling / decoupling of RF signals are provided.
  • Duplexers transmitting / receiving switches are devices for separating the transmitting and receiving channels in order to prevent, in systems using a common transmitting and receiving antenna, that energy m reaches the receiver during transmission or energy m reaches the transmitter during reception.
  • Such duplexers are preferably used in analog mobile radio systems. The use of duplexers is also planned for future digital systems with high data rates.
  • duplexers have two branches, namely the transmitting branch and the receiving branch
  • diplexers are suitable for separating different bands of different mobile radio systems (e.g. DCS1800 / PCS) and may therefore have more than two branches.
  • duplexer which usually consists of two ceramic filters, in m mobile radio systems:
  • the insertion loss of both branches should be as low as possible, for example in order to lose as little transmission power as possible in the filter itself in the transmission branch.
  • the selection between the two branches should be as high as possible to suppress the generation of mixed products in the two branches.
  • the filters themselves should be as small as possible so that the duplexer does not take up too much space.
  • duplexers made from ceramic filters
  • the so-called monolithic duplexers a ceramic body is provided, in which a transmitting branch and a receiving branch, each made up of several coupled resonators, are arranged.
  • the advantage of such a monolithic duplexer lies in its production: only one ceramic body needs to be pressed in one piece, which considerably simplifies production compared to the production of two ceramic bodies.
  • a disadvantage that should not be underestimated is that the ceramic bodies of such monolithic duplexers are difficult to solder because of their size, and in addition corresponding mechanical stresses often arise on the respective underlays or “boards” since the ceramic filters themselves are not flexible.
  • duplexer ceramic filters or ceramic line resonators to be coupled are mounted on a carrier substrate.
  • the coupling structures between the ceramic filters are either contained in the carrier substrate or given by additional coils and capacitors.
  • a major disadvantage of this second type of duplexer is the high cost of the coupling structures. A reduction in the overall height due to the additional carrier substrate can only be achieved at the expense of a deterioration in the electrical parameters, such as in particular the insertion loss.
  • the present invention is therefore based on the object of providing a duplexer / diplexer which is simple to manufacture and assemble and which can be readily adapted to desired applications.
  • a duplexer / diplexer of the type mentioned at the outset in that the filters have a modular structure and are connected by shielding, and in that the two branches in their pass band are matched to an equal resistance value and in the stop band of the band adjacent to the pass band are broadband high impedance, so that when the two branches are connected in parallel, all three ports of the duplexer / diplexer are adapted to the resistance value.
  • the duplexer / diplexer according to the invention is therefore of modular construction.
  • the two branches are arranged in such a way that, for example, they are each adapted to a resistance value of 50 ohms in the pass band and are turned into broadband high-impedance or idle in the blocked band of the adjacent band to the pass band.
  • all three ports of the duplexer are matched to a resistance value of 50 ohms when the two branches are connected in parallel.
  • one of the two branches is not already high-impedance in the blocking area due to its basic structure, it can easily be set by a line structure on the side of the antenna port according to its length in the "Smith diagram", that is, the illustration of the right half of the impedance plane on the Complex reflection factor level, turn to idle.
  • the production of the duplexer / diplexer according to the invention is particularly simple since the two or more branches can be manufactured independently of one another.
  • the duplexer according to the invention is provided with approximately the same dimensions as an existing monolithic duplexer, as explained above, the two individual branches are each about half as large in the modular structure. With regard to the ability of the first surface to spread at approximately twice the frequency, however, the modular structure is considerably more advantageous.
  • the duplexer / diplexer according to the invention can even be constructed separately and miniaturize the receiving branch, for example, while leaving the transmitting branch as high as possible to maintain the low insertion loss.
  • a user is given as much freedom in design as possible.
  • All filters or duplexers / diplexers which consist of coupled ⁇ / 4 resonators have the disadvantage that they are capable of propagation at 3 times the frequency or a corresponding mixed product thereof. This can be remedied in an advantageous manner by a side structure which is at a distance of ⁇ / 12 from the front of the respective filter or branch of the duplexer / diplexer.
  • 2 is a side view of the duplexer according to the invention
  • 3 shows a plan view of a receiving branch of the duplexer according to the invention
  • Fig. 4 is a side view of the receiving branch of
  • Fig. 5 is a front view of the receiving branch of
  • FIG. 6 shows a detail in the direction of view of an arrow A in the receiving branch from FIG. 3.
  • Fig. 1 shows a front view of a duplexer 1 with a transmission branch 1 and a reception branch 2, both of which have a modular structure and are connected by a shield or sheet metal 3, which e.g. can be done by soldering.
  • the transmission branch 1 and the reception branch 2 each consist of a ceramic filter which is provided with metal pads 4 to 6 or 7 to 9, which are electrically separated from one another and from metallizations 11 by insulating gaps 10.
  • Through-holes 12 extend through the ceramic body of transmitting branch 1 and receiving branch 2, which can be designed in the usual way (see, for example, DE 195 34 158 Cl and DE 196 28 023 Cl).
  • the shield 3 made of metal is applied to one of the metallizations 11 and, as can be seen from the side view of FIG. 2, guided downwards and downwards at the front by the two ceramic bodies of the two branches 1, 2 at a distance from this front side curved outside.
  • Fig. 3 shows a plan view of the receiving branch 2 with the connection surface 7 for the antenna, the connection surface 8 for earth and the reception connection surface 9.
  • This figure shows the four through holes 12 through the ceramic body of the receiving branch 2. Areas 13 around the openings of the through holes 12 on the surface of the ceramic body are free of the metallization 11 (cf. FIG. 5).
  • An insulating gap 15 (cf. also FIG. 6) is located at a distance of ⁇ / 12 from the front of the respective branch 1 or 2. This can overcome disadvantages which are due to the fact that all filters or duplexers that are verkop - pelt ⁇ / 4 resonators exist, at which the triple frequency or a corresponding mixed product thereof can be propagated.
  • the two branches 1, 2 m are matched to an equal resistance value in their pass band and broadband in the stop band of the band adjacent to the pass band are high impedance.
  • the optimal ceramic shape that is suitable for this is found via appropriate pressing and sintering settings.
  • This resistance value can preferably be 50 ohms.
  • all three ports of the duplexer given by the connection pads 4 to 6 or 7 to 9 are then matched to the same resistance value, namely 50 ohms.
  • the high impedance of the two branches 1, 2 in the blocking region can be achieved by appropriate structuring of the antenna ports (cf., for example, connection area 7) and corresponding design of the side structure 14.
  • the two branches 1, 2 or their ceramic bodies can have different heights.
  • the receiving branch 2 it is possible for the receiving branch 2 to be miniaturized, while the transmitting branch 1 is left as high as possible in order to maintain a low attenuation.

Landscapes

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

Abstract

Cette invention concerne un duplexeur/diplexeur formé au moins d'une partie émission (1) et d'une partie réception (2). La partie émission (1) et la partie réception (2) sont reliées de façon modulaire grâce à blindage (3) et sont agencées de sorte qu'elles possèdent toutes les deux la même résistance (50 OMEGA ) dans leur bande passante et qu'elles possèdent, sur une large gamme de fréquences, une résistance importante dans les bandes de fréquences non transmises adjacentes à chacune des bandes passantes. De ce fait, grâce au branchement en parallèle des deux parties (1, 2), les trois ports du duplexeur/diplexeur possèdent la même résistance.
EP00908936A 1999-02-01 2000-01-26 Duplexeur/diplexeur forme de deux filtres a structure modulaire Withdrawn EP1155470A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19903855 1999-02-01
DE19903855A DE19903855B4 (de) 1999-02-01 1999-02-01 Antennenweiche
PCT/DE2000/000218 WO2000046871A1 (fr) 1999-02-01 2000-01-26 Duplexeur/diplexeur forme de deux filtres a structure modulaire

Publications (1)

Publication Number Publication Date
EP1155470A1 true EP1155470A1 (fr) 2001-11-21

Family

ID=7895986

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00908936A Withdrawn EP1155470A1 (fr) 1999-02-01 2000-01-26 Duplexeur/diplexeur forme de deux filtres a structure modulaire

Country Status (6)

Country Link
US (1) US6696904B1 (fr)
EP (1) EP1155470A1 (fr)
JP (1) JP2002536901A (fr)
CN (1) CN1339183A (fr)
DE (1) DE19903855B4 (fr)
WO (1) WO2000046871A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105099493B (zh) * 2014-04-25 2018-05-18 华为技术有限公司 射频电路和移动终端

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6920666U (de) 1969-05-22 1969-11-27 Dieter Wolff Abroll-und schneidegeraet
US4091344A (en) * 1977-01-19 1978-05-23 Wavecom Industries Microwave multiplexer having resonant circuits connected in series with comb-line bandpass filters
US4742562A (en) * 1984-09-27 1988-05-03 Motorola, Inc. Single-block dual-passband ceramic filter useable with a transceiver
US5023866A (en) * 1987-02-27 1991-06-11 Motorola, Inc. Duplexer filter having harmonic rejection to control flyback
US5103197A (en) * 1989-06-09 1992-04-07 Lk-Products Oy Ceramic band-pass filter
JPH0484501A (ja) * 1990-07-27 1992-03-17 Oki Electric Ind Co Ltd 分波器
US5293141A (en) * 1991-03-25 1994-03-08 Sanyo Electric Co., Ltd. Dielectric filter having external connection terminals on dielectric substrate and antenna duplexer using the same
JPH0621701A (ja) * 1992-06-30 1994-01-28 Taiyo Yuden Co Ltd 誘電体共振器を含むフィルタ装置
JP3366021B2 (ja) * 1992-07-29 2003-01-14 松下電器産業株式会社 アンテナ共用器
JPH06132706A (ja) * 1992-09-07 1994-05-13 Murata Mfg Co Ltd 誘電体共振部品
JP3407931B2 (ja) * 1993-05-31 2003-05-19 三洋電機株式会社 空中線共用器及び空中線共用器の整合回路の調整方法
JPH0795643B2 (ja) * 1993-08-27 1995-10-11 株式会社村田製作所 フィルタ装置
US5422610A (en) * 1993-09-29 1995-06-06 Motorola, Inc. Multi-filter device and method of making same
JP3230353B2 (ja) * 1993-11-18 2001-11-19 株式会社村田製作所 アンテナ共用器
US5652555A (en) * 1994-06-03 1997-07-29 Murata Manufacturing Co., Ltd. Dielectrical filters having resonators at a trap frequency where the even/odd mode impedances are both zero
JP3450926B2 (ja) * 1995-02-02 2003-09-29 日本特殊陶業株式会社 誘電体フィルタ及びその周波数帯域幅の調整方法
DE19534158C1 (de) * 1995-09-14 1997-03-13 Siemens Matsushita Components Mikrowellen-Keramikfilter
KR970054817A (ko) * 1995-12-27 1997-07-31 이형도 듀플렉스 유전체 필터
US5745018A (en) * 1996-07-09 1998-04-28 Motorola Inc. Ceramic filter with a coplanar shield
DE19628023C1 (de) * 1996-07-11 1997-06-12 Siemens Matsushita Components Monolithisches Filter
US5790001A (en) * 1997-02-27 1998-08-04 Motorola, Inc. Shield and ceramic filter
US5864265A (en) * 1997-06-30 1999-01-26 Motorola Inc. Bandstop filter module with shunt zero
JPH11274813A (ja) * 1998-03-24 1999-10-08 Ngk Spark Plug Co Ltd 誘電体フィルタ及びその製造方法
US5959511A (en) * 1998-04-02 1999-09-28 Cts Corporation Ceramic filter with recessed shield

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0046871A1 *

Also Published As

Publication number Publication date
DE19903855A1 (de) 2000-10-19
CN1339183A (zh) 2002-03-06
US6696904B1 (en) 2004-02-24
WO2000046871A1 (fr) 2000-08-10
DE19903855B4 (de) 2010-04-15
JP2002536901A (ja) 2002-10-29

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