EP0910876A1 - Filtre monolithique - Google Patents

Filtre monolithique

Info

Publication number
EP0910876A1
EP0910876A1 EP97931679A EP97931679A EP0910876A1 EP 0910876 A1 EP0910876 A1 EP 0910876A1 EP 97931679 A EP97931679 A EP 97931679A EP 97931679 A EP97931679 A EP 97931679A EP 0910876 A1 EP0910876 A1 EP 0910876A1
Authority
EP
European Patent Office
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.)
Granted
Application number
EP97931679A
Other languages
German (de)
English (en)
Other versions
EP0910876B1 (fr
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
Publication of EP0910876A1 publication Critical patent/EP0910876A1/fr
Application granted granted Critical
Publication of EP0910876B1 publication Critical patent/EP0910876B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • the invention relates to a monolithic filter, in particular a microwave filter, which consists of a ceramic body in which through-holes are arranged which lead from one side to the opposite side, in which the surface of the ceramic body has, with the exception of one side, a metallization which is isolated from the metallization Has pads for capacitive coupling / decoupling of RF signals, and in which a ground connection is arranged between the pads.
  • a microwave filter which consists of a ceramic body in which through-holes are arranged which lead from one side to the opposite side, in which the surface of the ceramic body has, with the exception of one side, a metallization which is isolated from the metallization Has pads for capacitive coupling / decoupling of RF signals, and in which a ground connection is arranged between the pads.
  • Such a filter is known from US 5,162,760.
  • connection connection arranged between the connection surfaces serves to reduce or avoid crosstalk.
  • this ground connection is galvanically connected to the outer metallization.
  • the object of the present invention is to provide a filter of the type mentioned at the outset, in which these difficulties during soldering cannot occur.
  • This object is achieved in that the ground connection is separated from the metallization.
  • This configuration achieves the advantage that the amount of solder in the ground connection arranged between the HF connections cannot run away.
  • a microwave ceramic filter 1 which consists of a ceramic body 2, in which through holes 3, 4 are arranged, which lead from one side 5 to the opposite side 6.
  • All outer surfaces of the ceramic body 2 with the exception of the surface 6 are provided with a metallization 7.
  • the inside of the through holes 3, 4 is also provided with a metallization, so that coaxial resonators are formed.
  • connection surfaces 8, 9, which are used for the capacitive coupling and decoupling of HF signals, are arranged above the through-holes 3, 4 from the remaining metallization 7. Between the connection surfaces 8, 9 there is a ground connection 10, which according to the invention is also separated from the rest of the metallization 7.
  • connection surfaces 8, 9, 10 are produced by separating them from the originally continuous metallization 7 by etching or mechanically by grinding from the surrounding metallization. Since the insulation of the ground connection 10 takes place simultaneously with the manufacture of the HF connection surfaces 8, 9, there is no additional effort.

Landscapes

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

Abstract

L'invention concerne un filtre (1) monolithique, notamment un filtre hyperfréquence, composé d'un corps (2) en céramique doté de perforations (3,4). A l'exception d'un côté (6), la surface du corps (2) en céramique est recouverte d'une couche métallique (7). Des surfaces de contact (8,9) séparées de la couche métallique (7) permettent d'injecter et d'extraire des signaux haute fréquence. Entre les surfaces de contact (8,9), se trouve une connexion à la terre (10) laquelle est également séparée de la couche métallique (7).
EP97931679A 1996-07-11 1997-06-27 Filtre monolithique Expired - Lifetime EP0910876B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19628023 1996-07-11
DE19628023A DE19628023C1 (de) 1996-07-11 1996-07-11 Monolithisches Filter
PCT/DE1997/001359 WO1998002934A1 (fr) 1996-07-11 1997-06-27 Filtre monolithique

Publications (2)

Publication Number Publication Date
EP0910876A1 true EP0910876A1 (fr) 1999-04-28
EP0910876B1 EP0910876B1 (fr) 1999-12-22

Family

ID=7799587

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97931679A Expired - Lifetime EP0910876B1 (fr) 1996-07-11 1997-06-27 Filtre monolithique

Country Status (5)

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

Families Citing this family (3)

* 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
DE19855872B4 (de) * 1998-12-03 2004-04-15 Epcos Ag Mikrowellen-Keramikfilter
DE19903855B4 (de) * 1999-02-01 2010-04-15 Epcos Ag Antennenweiche

Family Cites Families (3)

* 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
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9802934A1 *

Also Published As

Publication number Publication date
JP2000514622A (ja) 2000-10-31
CA2260212A1 (fr) 1998-01-22
DE59700909D1 (en) 2000-01-27
EP0910876B1 (fr) 1999-12-22
DE19628023C1 (de) 1997-06-12
WO1998002934A1 (fr) 1998-01-22

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