DE58905017D1 - ROTATING ANTENNA WITH BEARING AND COUNTERWEIGHT. - Google Patents

ROTATING ANTENNA WITH BEARING AND COUNTERWEIGHT.

Info

Publication number
DE58905017D1
DE58905017D1 DE8989108666T DE58905017T DE58905017D1 DE 58905017 D1 DE58905017 D1 DE 58905017D1 DE 8989108666 T DE8989108666 T DE 8989108666T DE 58905017 T DE58905017 T DE 58905017T DE 58905017 D1 DE58905017 D1 DE 58905017D1
Authority
DE
Germany
Prior art keywords
antenna
bearing
counterweight
dimensioning
impedance
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
DE8989108666T
Other languages
German (de)
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 AG
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
Application granted granted Critical
Publication of DE58905017D1 publication Critical patent/DE58905017D1/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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>
DE8989108666T 1988-05-26 1989-05-13 ROTATING ANTENNA WITH BEARING AND COUNTERWEIGHT. Expired - Fee Related DE58905017D1 (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
DE58905017D1 true DE58905017D1 (en) 1993-09-02

Family

ID=6355141

Family Applications (2)

Application Number Title Priority Date Filing Date
DE3817844A Withdrawn DE3817844A1 (en) 1988-05-26 1988-05-26 ROTATING ANTENNA WITH BEARING AND COUNTERWEIGHT
DE8989108666T Expired - Fee Related DE58905017D1 (en) 1988-05-26 1989-05-13 ROTATING ANTENNA WITH BEARING AND COUNTERWEIGHT.

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE3817844A Withdrawn DE3817844A1 (en) 1988-05-26 1988-05-26 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
ATE92215T1 (en) 1993-08-15
EP0343465A2 (en) 1989-11-29
EP0343465B1 (en) 1993-07-28
EP0343465A3 (en) 1990-11-07
DE3817844A1 (en) 1989-12-07

Similar Documents

Publication Publication Date Title
EP0255048A3 (en) Portable radio telephone having power saver
DE3882869D1 (en) RADIO ARRANGEMENT WITH TWO RADIO DEVICES AND DIVIDED DEVICE.
EP0367270A3 (en) Data circuit-terminating equipment with power source device attached thereto
DE3856376T2 (en) Antenna with two operating modes in a portable radio telephone
EP0297790A3 (en) Antenna for portable radio communication apparatus
GB8924132D0 (en) Thin portable radio equipment
GB2271887A (en) Antenna coupling apparatus for a cordless telephone
DK318287D0 (en) PORTABLE TWO-ROAD RADIO WITH SHARED UNIVERSAL DEVICE CONNECTOR
EP0251296A3 (en) Portable communication terminal for remote data query
EP1069641A3 (en) Antenna device
DE58905017D1 (en) ROTATING ANTENNA WITH BEARING AND COUNTERWEIGHT.
DE2962111D1 (en) High frequency antenna mounted on a telescopic mast
DE59205791D1 (en) Walkie-talkie of electrical communication engineering
AU108531S (en) Portable telephone apparatus
EP0399176A3 (en) Construction of a telephone handset operating as an independent unit
EP0350006A3 (en) Antenna structure used in portable radio device
ATE91360T1 (en) RADIO.
FR2613562B1 (en) PORTABLE RADIO WITH DETACHABLE HANDSET
AU587718B2 (en) Portable locking device
SG133393G (en) Portable radio telephone having power saver
AU5662390A (en) Lifting apparatus provided with suction devices
JPS51141517A (en) Multi-head facsimile equipment
KR910010161U (en) Antenna lifting device of cordless phone
ZA873785B (en) Portable endermic injector
CA2040476A1 (en) Facsimile apparatus comprising cordless telephone set

Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: GRUNDIG E.M.V. ELEKTRO-MECHANISCHE VERSUCHSANSTALT

8327 Change in the person/name/address of the patent owner

Owner name: GRUNDIG AG, 90762 FUERTH, DE

8339 Ceased/non-payment of the annual fee