WO1991001048A1 - Moyen conferant un effet filtrant a une antenne a rayonnement zenithale reduit - Google Patents

Moyen conferant un effet filtrant a une antenne a rayonnement zenithale reduit Download PDF

Info

Publication number
WO1991001048A1
WO1991001048A1 PCT/SE1989/000407 SE8900407W WO9101048A1 WO 1991001048 A1 WO1991001048 A1 WO 1991001048A1 SE 8900407 W SE8900407 W SE 8900407W WO 9101048 A1 WO9101048 A1 WO 9101048A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
antennas
receiver
transmitter
filter
Prior art date
Application number
PCT/SE1989/000407
Other languages
English (en)
Inventor
Ulf Saldell
Original Assignee
Allgon Antenn Ab
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 Allgon Antenn Ab filed Critical Allgon Antenn Ab
Priority to DE68927894T priority Critical patent/DE68927894T2/de
Priority to EP89908727A priority patent/EP0481986B1/fr
Publication of WO1991001048A1 publication Critical patent/WO1991001048A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
    • H01Q1/525—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas between emitting and receiving antennas

Definitions

  • This invention concerns means for filter effect by antennas for communication radio sets and wireless telephones having the transmitter and the receiver in one and the same housing, to which an antenna is adapted and forms communication means for signales to and from another apparatus.
  • the object of the invention is to eliminate the necessaty of an duplex filter which is adapted in the apparatus in order to protect that the transmitting signal disturbes the receiver in a communication radio set or a wireless telephone.
  • Duplex filter is an expensive means and it is a great advantages if the antenna can be arranged without duplex filter.
  • the invention is characterized in that the antennas are adapted separated from each other whereby one of the antennas is connected to and tune to the transmitter and the second antenna is connected to and tuned to the receiver.
  • FIG. 1 is thereby a schematic view of an apparatus having upsetl antennas.
  • Fig. 2 is a schematic view of a similar apparatus but having antennas inside the housing.
  • Fig. 3 is a view of an antenna to be used with the apparatus according to Fig. 2.
  • a communication radio set or a wireless telephone includes an housing 1.
  • a receiver 2 and a transmitter 3 are arranged within the housing.
  • the apparatus is so formed that the communication operates in and out at the same time and thus without either of the receiver or the transmitter to be turned off.
  • the apparatus is provided with a first antenna 4 which is connected to the receiver and a second antenna 5 which is connected to the transmitter. The transmitter and the receiver operate on
  • the antenna 4 is tuned to the receiver 2 and the antenna 5 is tuned to the transmitter 3.
  • the antenna 4 may be connected to the receiver via a simple filter 6 and the antenna 5 may be connected to the transmitter 3 via a simple filter 7.
  • Duplex filter which is much more expensive than the filters 6 and 7 is not needed when operating the apparatus according to Fig. 1.
  • a second embodiment is showen in Fig. 2 and it can be seen that in this case the antennas 8 and 9 have been placed inside the housing 1.
  • Simple filters 10 and 11 may also in this case be placed between the connections to the antennas respectively.
  • the antennas ⁇ and 9 are so formed that the aerial pattern is asymmetrical, thus according to the patterns showen on the left side of Fig. 2.
  • the antenna action will thus be directed from the interior of the apparatus.
  • Antennas having a radiation action according to what is showen in Fig. 2 can be designed also according to the antennas showen in Fig. 1.
  • the connections between antenna and receiver respectively can be made more simple.
  • the contacts of the antennas can simply be of the coaxial type or any other type which are availible on the market and using this simple types of contacts will make the design simple and cheap.
  • FIG. 3 An embodiment of an antenna which has directive action is showen schematicly in Fig. 3.
  • the antenna according Fig. 3 can be said to represent the antenna 8 Fig. 2 and it consists of a metal element 12 and antenna elements 13 placed above the metal element 12.
  • the antenna pattern of this antenna is according to the diagram in Fig. 2 at the top to the left. This diagram is the denoted with A.
  • a design perporming the antenna pattern according to B of Fig. 2 can be used for the antenna 9.
  • the antenna showen in Fig. 3 is here by inverted.

Landscapes

  • Support Of Aerials (AREA)
  • Transceivers (AREA)
  • Radio Transmission System (AREA)

Abstract

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.
PCT/SE1989/000407 1988-01-18 1989-07-12 Moyen conferant un effet filtrant a une antenne a rayonnement zenithale reduit WO1991001048A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE68927894T DE68927894T2 (de) 1988-01-18 1989-07-12 Filterwirkung aufweisende mittel durch antennendiversity
EP89908727A EP0481986B1 (fr) 1988-01-18 1989-07-12 Moyens filtrants utilisant des antennes a diversite de reception

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8800143A SE462191B (sv) 1988-01-18 1988-01-18 Anordning foer filterverkan vid antenner foer kommunikationsradioapparater och traadloesa telefoner

Publications (1)

Publication Number Publication Date
WO1991001048A1 true WO1991001048A1 (fr) 1991-01-24

Family

ID=20371098

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1989/000407 WO1991001048A1 (fr) 1988-01-18 1989-07-12 Moyen conferant un effet filtrant a une antenne a rayonnement zenithale reduit

Country Status (4)

Country Link
EP (1) EP0481986B1 (fr)
DE (1) DE68927894T2 (fr)
SE (1) SE462191B (fr)
WO (1) WO1991001048A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4410542A1 (de) * 1994-03-26 1995-09-28 Kolbe & Co Hans Sende- und Empfangssystem für Mobilfunkgeräte
DE19836952A1 (de) * 1998-08-17 2000-04-20 Philips Corp Intellectual Pty Sende- und Empfangsvorrichtung
US6204817B1 (en) 1998-09-28 2001-03-20 Allgon Ab Radio communication device and an antenna system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1194547A (en) * 1967-11-13 1970-06-10 Burndept Electronics Ltd Portable Radio Transmitting and Receiving Equipment
DE3301778A1 (de) * 1982-01-25 1983-08-04 Viking Phone Co., Inc., 94022 Los Altos, Calif. Schnurloses telefonsystem
US4672685A (en) * 1986-01-03 1987-06-09 Motorola, Inc. Dual band antenna having separate matched inputs for each band
US4721962A (en) * 1985-06-12 1988-01-26 Robert Bosch Gmbh Antenna for a transceiver, particularly portable telephone

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1194547A (en) * 1967-11-13 1970-06-10 Burndept Electronics Ltd Portable Radio Transmitting and Receiving Equipment
DE3301778A1 (de) * 1982-01-25 1983-08-04 Viking Phone Co., Inc., 94022 Los Altos, Calif. Schnurloses telefonsystem
US4721962A (en) * 1985-06-12 1988-01-26 Robert Bosch Gmbh Antenna for a transceiver, particularly portable telephone
US4672685A (en) * 1986-01-03 1987-06-09 Motorola, Inc. Dual band antenna having separate matched inputs for each band

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Vol 10, No 379, E465, Abstract of JP 61-171228, publ 1986-08-01. *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4410542A1 (de) * 1994-03-26 1995-09-28 Kolbe & Co Hans Sende- und Empfangssystem für Mobilfunkgeräte
DE4410542B4 (de) * 1994-03-26 2004-07-22 Fuba Automotive Gmbh & Co. Kg Anordnung für den Betrieb von Funkgeräten
DE19836952A1 (de) * 1998-08-17 2000-04-20 Philips Corp Intellectual Pty Sende- und Empfangsvorrichtung
US6314276B1 (en) 1998-08-17 2001-11-06 U.S. Philips Corporation Transmitted-receiver
US6204817B1 (en) 1998-09-28 2001-03-20 Allgon Ab Radio communication device and an antenna system

Also Published As

Publication number Publication date
EP0481986A1 (fr) 1992-04-29
SE8800143D0 (sv) 1988-01-18
EP0481986B1 (fr) 1997-03-19
DE68927894T2 (de) 1997-07-10
SE8800143L (sv) 1989-07-19
SE462191B (sv) 1990-05-14
DE68927894D1 (de) 1997-04-24

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