EP0343465A3 - Rotatable antenna with a bearing and a counterweight - Google Patents

Rotatable antenna with a bearing and a counterweight Download PDF

Info

Publication number
EP0343465A3
EP0343465A3 EP19890108666 EP89108666A EP0343465A3 EP 0343465 A3 EP0343465 A3 EP 0343465A3 EP 19890108666 EP19890108666 EP 19890108666 EP 89108666 A EP89108666 A EP 89108666A EP 0343465 A3 EP0343465 A3 EP 0343465A3
Authority
EP
European Patent Office
Prior art keywords
antenna
bearing
counterweight
rotatable
dimensioning
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
EP19890108666
Other languages
German (de)
Other versions
EP0343465A2 (en
EP0343465B1 (en
Inventor
Uwe Claassen
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.)
Grundig EMV Elektromechanische Versuchsanstalt Max Grundig GmbH
Original Assignee
Grundig EMV Elektromechanische Versuchsanstalt Max Grundig 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 Grundig EMV Elektromechanische Versuchsanstalt Max Grundig GmbH filed Critical Grundig EMV Elektromechanische Versuchsanstalt Max Grundig GmbH
Priority to AT89108666T priority Critical patent/ATE92215T1/en
Publication of EP0343465A2 publication Critical patent/EP0343465A2/en
Publication of EP0343465A3 publication Critical patent/EP0343465A3/en
Application granted granted Critical
Publication of EP0343465B1 publication Critical patent/EP0343465B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/02—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole
    • H01Q3/08—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole for varying two co-ordinates of the orientation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/08—Means for collapsing antennas or parts thereof
    • H01Q1/084—Pivotable antennas

Landscapes

  • Support Of Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Details Of Aerials (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)

Abstract

The bearing of a rotatable antenna, particularly a rod or telescopic antenna, should also provide the possibility of connection between antenna and antenna feedline with reliable contact during the rotation of the antenna. If DC-isolation between antenna and the line for supplying power to the set is additionally required for safety reasons, this requirement can only be met with difficulty with discrete components, for example capacitors, waveguides and so forth at high frequencies without a mismatch occurring between antenna and device. To produce matching and to meet the safety requirement, the bearing is constructed in the form of a capacitive rotary coupling matching the antenna impedance and impedance of the antenna feedline. In addition, the antenna rod length can be largely freely selected by dimensioning the individual components of the rotary coupling and by dimensioning the counterweight. The rotatable antenna is preferably used in the base station of a cordless telephone. <IMAGE>
EP89108666A 1988-05-26 1989-05-13 Rotatable antenna with a bearing and a counterweight Expired - Lifetime EP0343465B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89108666T ATE92215T1 (en) 1988-05-26 1989-05-13 ROTATING ANTENNA WITH BEARING AND COUNTERWEIGHT.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3817844A DE3817844A1 (en) 1988-05-26 1988-05-26 ROTATING ANTENNA WITH BEARING AND COUNTERWEIGHT
DE3817844 1988-05-26

Publications (3)

Publication Number Publication Date
EP0343465A2 EP0343465A2 (en) 1989-11-29
EP0343465A3 true EP0343465A3 (en) 1990-11-07
EP0343465B1 EP0343465B1 (en) 1993-07-28

Family

ID=6355141

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89108666A Expired - Lifetime EP0343465B1 (en) 1988-05-26 1989-05-13 Rotatable antenna with a bearing and a counterweight

Country Status (3)

Country Link
EP (1) EP0343465B1 (en)
AT (1) ATE92215T1 (en)
DE (2) DE3817844A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2253949B (en) * 1991-03-16 1995-08-09 Antenna Products Ltd Radio Antennas
US5874921A (en) * 1996-09-20 1999-02-23 Ericsson, Inc. Antenna impedance matching network requiring no switch contacts
DE10160688A1 (en) 2001-12-11 2003-06-18 Endress & Hauser Gmbh & Co Kg Device for determining and / or monitoring the level of a product in a container

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1358598A (en) * 1963-03-07 1964-04-17 Improvements to electric radio antennas
WO1987000974A1 (en) * 1985-07-30 1987-02-12 Larsen Electronics, Inc. Mobile antenna feed system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58162104A (en) * 1982-03-23 1983-09-26 Matsushita Electric Ind Co Ltd Rod antenna holding device
JPS60107903A (en) * 1983-11-16 1985-06-13 General Res Obu Erekutoronitsukusu:Kk Antenna device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1358598A (en) * 1963-03-07 1964-04-17 Improvements to electric radio antennas
WO1987000974A1 (en) * 1985-07-30 1987-02-12 Larsen Electronics, Inc. Mobile antenna feed system

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 7, no. 284 (E-217)(1429) 17 Dezember 1983, & JP-A-58 162104 (MATSUSHITA) 26 September 1983, *
PATENT ABSTRACTS OF JAPAN vol. 9, no. 258 (E-350)(1981) 16 Oktober 1985, & JP-A-60 107903 (ZENERARU RESEARCH) 13 Juni 1985, *

Also Published As

Publication number Publication date
ATE92215T1 (en) 1993-08-15
DE58905017D1 (en) 1993-09-02
EP0343465A2 (en) 1989-11-29
EP0343465B1 (en) 1993-07-28
DE3817844A1 (en) 1989-12-07

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