ATE92215T1 - ROTATING ANTENNA WITH BEARING AND COUNTERWEIGHT. - Google Patents

ROTATING ANTENNA WITH BEARING AND COUNTERWEIGHT.

Info

Publication number
ATE92215T1
ATE92215T1 AT89108666T AT89108666T ATE92215T1 AT E92215 T1 ATE92215 T1 AT E92215T1 AT 89108666 T AT89108666 T AT 89108666T AT 89108666 T AT89108666 T AT 89108666T AT E92215 T1 ATE92215 T1 AT E92215T1
Authority
AT
Austria
Prior art keywords
antenna
bearing
counterweight
dimensioning
impedance
Prior art date
Application number
AT89108666T
Other languages
German (de)
Inventor
Uwe Claassen
Original Assignee
Grundig Emv
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 filed Critical Grundig Emv
Application granted granted Critical
Publication of ATE92215T1 publication Critical patent/ATE92215T1/en

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>
AT89108666T 1988-05-26 1989-05-13 ROTATING ANTENNA WITH BEARING AND COUNTERWEIGHT. ATE92215T1 (en)

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
EP89108666A EP0343465B1 (en) 1988-05-26 1989-05-13 Rotatable antenna with a bearing and a counterweight

Publications (1)

Publication Number Publication Date
ATE92215T1 true ATE92215T1 (en) 1993-08-15

Family

ID=6355141

Family Applications (1)

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

Family Cites Families (4)

* 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
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
US4764773A (en) * 1985-07-30 1988-08-16 Larsen Electronics, Inc. Mobile antenna and through-the-glass impedance matched feed system

Also Published As

Publication number Publication date
DE58905017D1 (en) 1993-09-02
EP0343465A2 (en) 1989-11-29
EP0343465B1 (en) 1993-07-28
EP0343465A3 (en) 1990-11-07
DE3817844A1 (en) 1989-12-07

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Legal Events

Date Code Title Description
EEFA Change of the company name
REN Ceased due to non-payment of the annual fee