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1. WO1991001048 - MEANS FOR FILTER EFFECT BY DIVERSITY ANTENNA

Publication Number WO/1991/001048
Publication Date 24.01.1991
International Application No. PCT/SE1989/000407
International Filing Date 12.07.1989
Chapter 2 Demand Filed 09.03.1990
IPC
H01Q 1/52 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
QANTENNAS, i.e. RADIO AERIALS
1Details of, or arrangements associated with, antennas
52Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
CPC
H01Q 1/525
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
QANTENNAS, i.e. RADIO AERIALS
1Details of, or arrangements associated with, antennas
52Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
521reducing the coupling between adjacent antennas
525between emitting and receiving antennas
Applicants
  • ALLGON ANTENN AB [SE/SE]; Box 500 S-184 25 Åkersberga, SE (AllExceptUS)
  • SALDELL, Ulf [SE/SE]; SE (UsOnly)
Inventors
  • SALDELL, Ulf; SE
Agents
  • BILLBERG, Hans ; Jacobsson & Billberg Patentbyrå AB Box 21113 S-100 31 Stockholm, SE
  • MODIN, Jan ; Axel Ehrners Patentbyrå AB Box 10316 S-100 55 Stockholm, SE
Priority Data
Publication Language English (EN)
Filing Language Swedish (SV)
Designated States
Title
(EN) MEANS FOR FILTER EFFECT BY DIVERSITY ANTENNA
(FR) MOYEN CONFERANT UN EFFET FILTRANT A UNE ANTENNE A RAYONNEMENT ZENITHALE REDUIT
Abstract
(EN)
Means for filter effect by antennas for communication radio sets and wireless telephones having the transmitter and the receiver in the same housing includes a complicated filter between antenna and set of apparatus. It is necessary to have this duplex filter in the apparatus in order to prevent that the transmitting signal interferes with the receiver in a communication radio or wireless telephone. In order to eliminate the necessity of this filter there are adapted separately from each other one antenna (5) connected with and tuned to the transmitter (3) and the second antenna (4) connected with and tuned to receiver (2).
(FR)
Un moyen conférant un effet filtrant à des antennes destinées à des postes de radio communication ainsi qu'à des téléphones sans fil, l'émetteur et le récepteur se trouvant dans le même logement, comprend un filtre complex se trouvant entre l'antenne et le poste de l'appareil. Il est nécessaire d'avoir ce filtre duplex dans l'appareil afin d'empêcher que le signal de transmission ne brouille le récepteur dans une radio communication ou un téléphone sans fil. Afin d'éliminer la nécessité d'avoir recours à ce filtre, on a adapté séparément l'une de l'autre une antenne (5) connectée à l'émetteur (3) et syntonisée sur celui-ci, et une seconde antenne (4) connectée au récepteur (2) et syntonisée sur ce dernier.
Also published as
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