EP0481986A1 - Filterwirkung aufweisende mittel durch antennendiversity. - Google Patents

Filterwirkung aufweisende mittel durch antennendiversity.

Info

Publication number
EP0481986A1
EP0481986A1 EP89908727A EP89908727A EP0481986A1 EP 0481986 A1 EP0481986 A1 EP 0481986A1 EP 89908727 A EP89908727 A EP 89908727A EP 89908727 A EP89908727 A EP 89908727A EP 0481986 A1 EP0481986 A1 EP 0481986A1
Authority
EP
European Patent Office
Prior art keywords
antenna
receiver
antennas
transmitter
tuned
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
EP89908727A
Other languages
English (en)
French (fr)
Other versions
EP0481986B1 (de
Inventor
Ulf Saldell
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.)
Allgon AB
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
Publication of EP0481986A1 publication Critical patent/EP0481986A1/de
Application granted granted Critical
Publication of EP0481986B1 publication Critical patent/EP0481986B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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)
EP89908727A 1988-01-18 1989-07-12 Filterwirkung aufweisende mittel durch antennendiversity Expired - Lifetime EP0481986B1 (de)

Applications Claiming Priority (2)

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
PCT/SE1989/000407 WO1991001048A1 (en) 1988-01-18 1989-07-12 Means for filter effect by diversity antenna

Publications (2)

Publication Number Publication Date
EP0481986A1 true EP0481986A1 (de) 1992-04-29
EP0481986B1 EP0481986B1 (de) 1997-03-19

Family

ID=20371098

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89908727A Expired - Lifetime EP0481986B1 (de) 1988-01-18 1989-07-12 Filterwirkung aufweisende mittel durch antennendiversity

Country Status (4)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19836952A1 (de) * 1998-08-17 2000-04-20 Philips Corp Intellectual Pty Sende- und Empfangsvorrichtung

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4410542B4 (de) * 1994-03-26 2004-07-22 Fuba Automotive Gmbh & Co. Kg Anordnung für den Betrieb von Funkgeräten
SE514773C2 (sv) 1998-09-28 2001-04-23 Allgon Ab Radiokommunikationsenhet och antennsystem

Family Cites Families (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
GB2120905B (en) * 1982-01-25 1986-03-19 Viking Phone Co Inc Cordless telephone
DE3520983A1 (de) * 1985-06-12 1986-12-18 Robert Bosch Gmbh, 7000 Stuttgart Antenne fuer ein funksende- und -empfangsgeraet
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
See references of WO9101048A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19836952A1 (de) * 1998-08-17 2000-04-20 Philips Corp Intellectual Pty Sende- und Empfangsvorrichtung

Also Published As

Publication number Publication date
SE8800143D0 (sv) 1988-01-18
SE8800143L (sv) 1989-07-19
DE68927894D1 (de) 1997-04-24
EP0481986B1 (de) 1997-03-19
DE68927894T2 (de) 1997-07-10
WO1991001048A1 (en) 1991-01-24
SE462191B (sv) 1990-05-14

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