DE19628023C1 - Monolithic filter - Google Patents

Monolithic filter

Info

Publication number
DE19628023C1
DE19628023C1 DE19628023A DE19628023A DE19628023C1 DE 19628023 C1 DE19628023 C1 DE 19628023C1 DE 19628023 A DE19628023 A DE 19628023A DE 19628023 A DE19628023 A DE 19628023A DE 19628023 C1 DE19628023 C1 DE 19628023C1
Authority
DE
Germany
Prior art keywords
metallization
filter
ground connection
ceramic body
separated
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.)
Expired - Fee Related
Application number
DE19628023A
Other languages
German (de)
Inventor
Christian Block
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
Siemens Matsushita Components GmbH and Co KG
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 Matsushita Components GmbH and Co KG filed Critical Siemens Matsushita Components GmbH and Co KG
Priority to DE19628023A priority Critical patent/DE19628023C1/en
Application granted granted Critical
Publication of DE19628023C1 publication Critical patent/DE19628023C1/en
Priority to JP10505498A priority patent/JP2000514622A/en
Priority to DE59700909T priority patent/DE59700909D1/en
Priority to EP97931679A priority patent/EP0910876B1/en
Priority to PCT/DE1997/001359 priority patent/WO1998002934A1/en
Priority to CA002260212A priority patent/CA2260212A1/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H01P1/201—Filters for transverse electromagnetic waves
    • H01P1/205—Comb or interdigital filters; Cascaded coaxial cavities
    • H01P1/2056—Comb filters or interdigital filters with metallised resonator holes in a dielectric block

Landscapes

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

Abstract

The invention concerns a monolithic filter, in particular a microwave filter, comprising a ceramic body (2) with through holes (3,4). With the exception of one side (6) the surface of the ceramic body (2) is provided with a metallic coating (7). For the injection and extraction of RF signals, terminal faces (8,9) are attached which are separated from the metallic coating (7). Between the terminal faces (8,9) is a ground connection (10) which is also separated from the metallic coating (7).

Description

Die Erfindung betrifft ein monolithisches Filter, insbesonde­ re Mikrowellenfilter, das aus einem Keramikkörper besteht, in dem Durchbohrungen angeordnet sind, die von einer Seite zur gegenüberliegenden Seite führen, bei dem die Oberfläche des Keramikkörpers mit Ausnahme einer Seite eine Metallisierung besitzt, der von der Metallisierung isolierte Anschlußflächen zum kapazitiven Ein-/Auskoppeln von HF-Signalen aufweist, und bei dem zwischen den Anschlußflächen ein Masseanschluß ange­ ordnet ist.The invention relates to a monolithic filter, in particular re microwave filter, which consists of a ceramic body, in the holes are arranged from one side to the opposite side, where the surface of the Ceramic body with the exception of one side a metallization possesses, the connection surfaces insulated from the metallization for capacitive coupling / decoupling of RF signals, and with a ground connection between the pads is arranged.

Ein derartiges Filter ist aus der US 5,162,760 bekannt.Such a filter is known from US 5,162,760.

Der zwischen den Anschlußflächen angeordnete Masseanschluß dient dazu, ein Übersprechen zu reduzieren oder zu vermeiden. Bei dem bekannten Filter ist dieser Masseanschluß mit der Au­ ßenmetallisierung galvanisch verbunden. Es besteht nun die Gefahr, daß bei einer Lötung Lötmetall über das Bauelement verrinnt, was sich bestenfalls nur mit Hilfe von aufwendig aufzubringendem Lötstopplack vermeiden ließe.The ground connection located between the pads is used to reduce or avoid crosstalk. In the known filter, this ground connection is with the Au External metallization galvanically connected. There is now the Risk of solder over the component during soldering trickles away, which can only be done with the help of complex prevent solder mask to be applied.

Aufgabe der vorliegenden Erfindung ist es, ein Filter der eingangs genannten Art anzugeben, bei dem diese Schwierigkei­ ten beim Löten nicht auftreten können.The object of the present invention is to provide a filter Specify the type mentioned, in which this difficulty cannot occur during soldering.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Masseanschluß von der Metallisierung getrennt ist.This object is achieved in that the Ground connection is separated from the metallization.

Durch diese Ausgestaltung wird der Vorteil erzielt, daß die Lotmenge des zwischen den HF-Anschlüssen angeordneten Mas­ seanschlusses nicht verrinnen kann.This configuration has the advantage that the Amount of solder of the Mas arranged between the RF connections can not run out.

Der Gegenstand der Erfindung wird anhand eines Ausführungs­ beispieles näher erläutert.The object of the invention is based on an embodiment example explained in more detail.

In der dazugehörenden Zeichnung mit einer einzigen Figur ist ein Mikrowellenkeramikfilter 1 dargestellt, das aus einem Ke­ ramikkörper 2 besteht, in dem Durchbohrungen 3, 4 angeordnet sind, die von einer Seite 5 zur gegenüberliegenden Seite 6 führen.In the accompanying drawing with a single figure, a microwave ceramic filter 1 is shown, which consists of a Ke ramikkörper 2 , in which through holes 3 , 4 are arranged, which lead from one side 5 to the opposite side 6 .

Alle Außenflächen des Keramikkörpers 2 mit Ausnahme der Flä­ che 6 sind mit einer Metallisierung 7 versehen. Die Innensei­ te der Durchbohrungen 3, 4 ist ebenfalls mit einer Metalli­ sierung versehen, so daß koaxiale Resonatoren gebildet wer­ den.All outer surfaces of the ceramic body 2 with the exception of the surface 6 are provided with a metallization 7 . The inner side of the holes 3 , 4 is also provided with a metallization so that coaxial resonators are formed.

Auf der in der Figur als Oberseite dargestellten Fläche sind über den Durchbohrungen 3, 4 von der übrigen Metallisierung 7 isolierte Anschlußflächen 8, 9 angeordnet, die zur kapaziti­ ven Ein- bzw. Auskoppelung von HF-Signales dienen. Zwischen den Anschlußflächen 8, 9 befindet sich ein Masseanschluß 10, der gemäß der Erfindung ebenfalls von der übrigen Metallisie­ rung 7 getrennt ist.On the surface shown in the figure as the upper side, through the holes 3 , 4 from the rest of the metallization 7 insulated connection surfaces 8 , 9 are arranged, which are used for capacitive coupling and decoupling of RF signals. Between the connection surfaces 8 , 9 there is a ground connection 10 , which is also separated from the rest of the metallization 7 according to the invention.

Die Herstellung der Anschlußflächen 8, 9, 10 geschieht da­ durch, daß diese von der ursprünglich durchgehenden Metalli­ sierung 7 ätztechnisch bzw. mechanisch durch Schleifen von der Umgebungsmetallisierung getrennt werden. Da die Isolie­ rung des Masseanschlusses 10 gleichzeitig mit der Herstellung der HF-Anschlußflächen 8, 9 erfolgt, entsteht kein Mehrauf­ wand.The preparation of the pads 8 , 9 , 10 is done by separating them from the originally continuous metallization 7 etching or mechanically by grinding from the surrounding metallization. Since the isolation of the ground connection 10 takes place simultaneously with the manufacture of the RF pads 8 , 9 , there is no additional wall.

Claims (1)

Monolithisches Filter (1), insbesondere Mikrowellenfilter, das aus einem Keramikkörper (2) besteht, in dem Durchbohrun­ gen (3, 4) angeordnet sind, die von einer Seite (5) zur ge­ genüberliegenden Seite (6) führen, bei dem die Oberfläche des Keramikkörpers (2) mit Ausnahme einer Seite (6) eine Metalli­ sierung (7) besitzt, der von der Metallisierung (7) isolierte Anschlußflächen (8, 9) zum kapazitiven Ein-/Auskoppeln von HF-Signalen aufweist, und bei dem zwischen den Anschlußflä­ chen (8, 9) ein Masseanschluß (10) angeordnet ist, dadurch gekennzeichnet, daß der Masseanschluß (10) von der Metallisierung (7) ge­ trennt ist.Monolithic filter ( 1 ), in particular microwave filter, which consists of a ceramic body ( 2 ), in the perforations gene ( 3 , 4 ) are arranged, which lead from one side ( 5 ) to the opposite side ( 6 ), in which the surface of the ceramic body ( 2 ) with the exception of one side ( 6 ) has a metallization ( 7 ), which has metallized ( 7 ) insulated connection surfaces ( 8 , 9 ) for capacitive coupling / decoupling of RF signals, and in which between the connection surface ( 8 , 9 ) has a ground connection ( 10 ) arranged, characterized in that the ground connection ( 10 ) is separated from the metallization ( 7 ).
DE19628023A 1996-07-11 1996-07-11 Monolithic filter Expired - Fee Related DE19628023C1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DE19628023A DE19628023C1 (en) 1996-07-11 1996-07-11 Monolithic filter
JP10505498A JP2000514622A (en) 1996-07-11 1997-06-27 Monolithic filter
DE59700909T DE59700909D1 (en) 1996-07-11 1997-06-27 Monolithisches filter
EP97931679A EP0910876B1 (en) 1996-07-11 1997-06-27 Monolithic filter
PCT/DE1997/001359 WO1998002934A1 (en) 1996-07-11 1997-06-27 Monolithic filter
CA002260212A CA2260212A1 (en) 1996-07-11 1997-06-27 Monolithic filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19628023A DE19628023C1 (en) 1996-07-11 1996-07-11 Monolithic filter

Publications (1)

Publication Number Publication Date
DE19628023C1 true DE19628023C1 (en) 1997-06-12

Family

ID=7799587

Family Applications (2)

Application Number Title Priority Date Filing Date
DE19628023A Expired - Fee Related DE19628023C1 (en) 1996-07-11 1996-07-11 Monolithic filter
DE59700909T Expired - Lifetime DE59700909D1 (en) 1996-07-11 1997-06-27 Monolithisches filter

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE59700909T Expired - Lifetime DE59700909D1 (en) 1996-07-11 1997-06-27 Monolithisches filter

Country Status (5)

Country Link
EP (1) EP0910876B1 (en)
JP (1) JP2000514622A (en)
CA (1) CA2260212A1 (en)
DE (2) DE19628023C1 (en)
WO (1) WO1998002934A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000033412A1 (en) * 1998-12-03 2000-06-08 Epcos Ag Method for adjusting the filter characteristic of a microwave ceramic filter
DE19903855A1 (en) * 1999-02-01 2000-10-19 Epcos Ag Duplexer / diplexer made of two modular filters

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5906978A (en) 1996-08-14 1999-05-25 Hemocleanse, Inc. Method for iron delivery to a patient by transfer from dialysate

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5162760A (en) * 1991-12-19 1992-11-10 Motorola, Inc. Dielectric block filter with isolated input/output contacts

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5379011A (en) * 1992-10-23 1995-01-03 Motorola, Inc. Surface mount ceramic filter duplexer having reduced input/output coupling and adjustable high-side transmission zeroes
US5721520A (en) * 1995-08-14 1998-02-24 Motorola, Inc. Ceramic filter with ground plane features which provide transmission zero and coupling adjustment

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5162760A (en) * 1991-12-19 1992-11-10 Motorola, Inc. Dielectric block filter with isolated input/output contacts

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Patent Abstracts of Japan, JP 07-142910 A "Antenna Resonator" *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000033412A1 (en) * 1998-12-03 2000-06-08 Epcos Ag Method for adjusting the filter characteristic of a microwave ceramic filter
DE19855872B4 (en) * 1998-12-03 2004-04-15 Epcos Ag Microwave ceramic filters
DE19903855A1 (en) * 1999-02-01 2000-10-19 Epcos Ag Duplexer / diplexer made of two modular filters
DE19903855B4 (en) * 1999-02-01 2010-04-15 Epcos Ag antenna Combiner

Also Published As

Publication number Publication date
EP0910876B1 (en) 1999-12-22
CA2260212A1 (en) 1998-01-22
EP0910876A1 (en) 1999-04-28
WO1998002934A1 (en) 1998-01-22
DE59700909D1 (en) 2000-01-27
JP2000514622A (en) 2000-10-31

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Legal Events

Date Code Title Description
8100 Publication of the examined application without publication of unexamined application
D1 Grant (no unexamined application published) patent law 81
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: EPCOS AG, 81541 MUENCHEN, DE

8339 Ceased/non-payment of the annual fee