EP0593185B1 - Breitbandige Antennenanordnung - Google Patents
Breitbandige Antennenanordnung Download PDFInfo
- Publication number
- EP0593185B1 EP0593185B1 EP93307839A EP93307839A EP0593185B1 EP 0593185 B1 EP0593185 B1 EP 0593185B1 EP 93307839 A EP93307839 A EP 93307839A EP 93307839 A EP93307839 A EP 93307839A EP 0593185 B1 EP0593185 B1 EP 0593185B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- antenna
- coil
- coils
- arrangement
- antenna coil
- 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 - Lifetime
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/362—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith for broadside radiating helical antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
Definitions
- This invention relates to an antenna arrangement, particularly suitable for use in wideband telephone applications.
- a coil antenna (sometimes referred to as a "helical antenna”) offers a relatively compact configuration suitable for use with portable radio telephones where size and weight are important considerations.
- US patent No. 4,868,576 discloses a retractable antenna arrangement for a portable radio transceiver, including a fixed antenna coil and a retractable whip antenna extending through the antenna coil.
- European patent application EP-A-0,467,822 relates to a retractable antenna arrangement for a CT2 cordless telephone, and includes an antenna coil carried by an extendable antenna rod. In the extended position a switching device causes the antenna coil to be disconnected so that only the antenna rod is operative, but in the retracted position the antenna rod is disconnected in favour of the antenna coil. Also, our co-pending British patent application no.
- 9115134 relates to an antenna assembly comprising an elongate antenna element mounted in a support and movable between a retracted position and an extended position.
- a helical antenna element is carried by one end of the elongate element.
- the elongate antenna element is automatically rendered inactive as a radiating element by movement to the retracted position.
- the bandwidth of a coil antenna is relatively narrow. This may not be a problem in analogue systems where the total operating bandwidth is relatively narrow, i.e. where the duplex separation (between the transmit and receive bands) is low, e.g. 45 MHz.
- the digital cellular system proposed for Japan has a much higher duplex separation of 130 MHz. In this case a single helical antenna cannot be used because of its limited bandwidth.
- an antenna arrangement for a wideband transceiver comprising a first antenna coil tuned to operate across the receive frequency band of the transceiver, and a second antenna coil tuned to operate across the transmit frequency band of the transceiver, wherein the first and second antenna coils share a common feed point, the receive frequency band,and the transmit frequency band do not overlap, characterised in that the second antenna coil does not load the first antenna coil when the first antenna coil is operating in the receive frequency band.
- An antenna arrangement according to the preamble of claim 1 is known from patent document AU-D-2284 370.
- An antenna arrangement in accordance with the invention has the advantage that it permits coil antennas to be used, even in a wideband system. Even though two separate coils are required, the overall arrangement may nevertheless be relatively compact. To this end both coils are preferably enclosed within a common housing.
- one of the antenna coils is used for reception and is tuned to the receive frequency, and the other is used for transmission and is tuned to the transmit frequency.
- the two antenna coils may be disposed in various configurations, preferably on a common axis. Thus, the two coils may be disposed in line. In this case the diameter of the two coils may be the same or different.
- the two coils may be arranged concentrically, one within the other. In this case the inner coil would have a smaller diameter than the outer coil. In another arrangement the two coils may be interwound, in which case they would both have substantially the same diameter.
- one or both of the antenna coils need not have a uniform diameter, but may instead have a gradually increasing diameter. In this case the antenna coil(s) would be in the form of a helix.
- the portable two-way radio in Figure 1 is a cellular telephone for use in a wideband cellular system such as the digital cellular system currently proposed for Japan.
- the telephone has a main housing 1 enclosing a transceiver 2.
- a pair of antenna coils 3,4 are provided in a common housing 10 outside the main housing 1 on the top wall thereof.
- the housing 10 may for example be a plastics encapsulation, and may be formed either as a discrete housing or integrally with the main housing 1.
- the two antenna coils are disposed in line (i.e. one above the other) on a common axis.
- the upper antenna coil 3 is coupled to the transmitter 5 of the transceiver 2 via a duplex filter 7, and the lower antenna coil 4 is coupled to the receiver 6 of the transceiver 2 via the duplex filter 7.
- the electrical length of the two antenna coils 3,4 is chosen so that the upper antenna coil 3 is a quarter-wavelength at the transmission frequency of the transceiver 2, and the lower antenna coil 4 is a quarter-wavelength at the receive frequency of the transceiver 2.
- the transmission band is 940-856 MHz and the receive band is 810-826 MHz.
- the upper antenna coil 3 may be tuned to 948 MHz, this being the centre frequency of the transmission band; and the lower antenna coil may be tuned to 818 MHz, this being the centre frequency of the receive band.
- the transmitting antenna coil 3 is above the receiving antenna coil 4, because the Applicant at present believes this will give better transmission performance since the antenna coil 3 is further removed from the metal ordinarily found within the telephone.
- the two antenna coils it is possible for the two antenna coils to be interchanged so that the receive antenna coil is disposed above the transmit antenna coil.
- the two antenna coils 3,4 have a common feed 8 to and from the duplex filter 7.
- the length of the portion 8a of the transmission feed for the antenna coil 3, which extends through the receive antenna coil 4, is selected to present an open circuit to the transmission antenna 3.
- THe antenna coils 3,4 can be designed to match to 50 ohms so that impedance matching may not be required.
- the telephone may comprise a second, receive antenna 9.
- the second receive antenna 9 may have any suitable form and is disposed within the main housing 1.
- the second receive antenna 9 is coupled to the receiver section 6 of the transceiver 2.
- the transmit antenna 30 has a larger diameter than the receive antenna 40 and the two antenna coils are disposed concentrically with the receive antenna coil 40 within the transmit antenna coil 30.
- the electrical length of the inner (receive) antenna 40 is greater than that of the outer (transmit) antenna coil 30, and so the axial length of the inner coil is greater than the outer coil 30.
- the inner coil 40 extends beyond the outer coil 30.
- the transmission antenna coil may be disposed within the receive antenna coil in which case the diameters may be selected so that the axial length of the two coils is substantially the same.
- one or both of the antenna coils need not have a uniform diameter, but may instead be in the form of a helix, i.e. with a gradually increasing diameter.
- the dual coil assembly may be carried by a retractable antenna rod in a manner analogous to that disclosed in the aforementioned European patent application EP-A-0,467,822 or British patent application no. 9115134.
- both of the antenna coils would be decoupled when the antenna rod is extended, but coupled to the transceiver when the antenna rod is retracted.
- both antenna coils may be provided inside rather than outside the main housing of the radiotelephone.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Support Of Aerials (AREA)
- Details Of Aerials (AREA)
- Telephone Set Structure (AREA)
Claims (9)
- Antennenanordnung für einen Breitband-Sendeempfänger (2), die eine erste Antennenspule (4), die abgestimmt ist, um über dem Empfangsfrequenzband des Sendeempfängers (2) betrieben zu werden, und eine zweite Antennenspule (3) umfaßt, die abgestimmt ist, um über dem Sendefrequenzband des Sendeempfängers betrieben zu werden, wobei die erste und die zweite Antennenspule einen gemeinsamen Speisepunkt (8) gemeinsam benutzen und das Empfangsfrequenzband und das Sendefrequenzband sich nicht überlappen, dadurch gekennzeichnet, daß die zweite Antennenspule (3) die erste Antennenspule (4) nicht belastet, wenn die erste Antennenspule (4) im Empfangsfrequenzband betrieben wird.
- Antennenanordnung nach Anspruch 1, wobei die ersten und zweiten Antennenspulen in einem gemeinsamen Gehäuse (10) angeordnet sind.
- Antennenanordnung nach einem der vorangehenden Ansprüche, wobei die ersten und zweiten Antennenspulen auf einer im wesentlichen gemeinsamen Achse angeordnet sind.
- Antennenanordnung nach Anspruch 3, wobei die ersten und zweiten Antennenspulen im wesentlichen hintereinander angeordnet sind.
- Antennenanordnung nach Anspruch 3, wobei die ersten und zweiten Antennenspulen unterschiedliche Durchmesser aufweisen und im wesentlichen konzentrisch, eine innerhalb der anderen, angeordnet sind.
- Antennenanordnung nach Anspruch 3, wobei die ersten und zweiten Antennenspulen zusammengewickelt sind.
- Breitband-Sendeempfängervorrichtung mit einer Antennenanordnung nach einem der vorhergehenden Ansprüche, die Mittel (6) zum Empfangen von Signalen, die eine erste Frequenz aufweisen, und Mittel (5) zum Senden von Signalen umfaßt, die eine zweite Frequenz aufweisen, die sich im wesentlichen von der ersten Frequenz unterscheidet, wobei die erste Antennenspule (4) mit den Empfangsmitteln (6) verbunden ist und die zweite Antennenspule (3) mit den Sendemitteln (5) verbunden ist.
- Breitband-Sendeempfängervorrichtung nach Anspruch 7, die ein Hauptgehäuse (1) umfaßt, das die Sendemittel (5) und die Empfangsmittel (6) umschließt, wobei sich die ersten und zweiten Antennenspulen außerhalb des Hauptgehäuses (1) befinden.
- Breitband-Sendeempfängervorrichtung nach Anspruch 7, die ein Hauptgehäuse (1) umfaßt, das die Sendemittel (5) und die Empfangsmittel (6) umschließt, wobei die ersten und zweiten Antennenspulen im Hauptgehäuse (1) vorhanden sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9221536 | 1992-10-14 | ||
GB9221536A GB2271670B (en) | 1992-10-14 | 1992-10-14 | Wideband antenna arrangement |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0593185A1 EP0593185A1 (de) | 1994-04-20 |
EP0593185B1 true EP0593185B1 (de) | 2000-08-30 |
Family
ID=10723407
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93307839A Expired - Lifetime EP0593185B1 (de) | 1992-10-14 | 1993-10-01 | Breitbandige Antennenanordnung |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0593185B1 (de) |
JP (1) | JPH06204726A (de) |
DE (1) | DE69329323T2 (de) |
GB (1) | GB2271670B (de) |
IL (1) | IL107272A (de) |
Families Citing this family (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3089933B2 (ja) * | 1993-11-18 | 2000-09-18 | 三菱電機株式会社 | アンテナ装置 |
JP3123363B2 (ja) * | 1994-10-04 | 2001-01-09 | 三菱電機株式会社 | 携帯無線機 |
FI99219C (fi) * | 1995-06-06 | 1997-10-27 | Nokia Mobile Phones Ltd | Kahdella taajuusalueella toimiva antenni |
US5708448A (en) * | 1995-06-16 | 1998-01-13 | Qualcomm Incorporated | Double helix antenna system |
SE9502610D0 (sv) * | 1995-07-14 | 1995-07-14 | Allgon Ab | A combination of at least one helically wound coil and carrier therefor for use in a helical antenna, and a method for the manufacture of such combination |
WO1997018601A1 (en) * | 1995-11-15 | 1997-05-22 | Allgon Ab | Dual band antenna means |
US5768691A (en) * | 1996-08-07 | 1998-06-16 | Nokia Mobile Phones Limited | Antenna switching circuits for radio telephones |
US6112102A (en) * | 1996-10-04 | 2000-08-29 | Telefonaktiebolaget Lm Ericsson | Multi-band non-uniform helical antennas |
US5909196A (en) * | 1996-12-20 | 1999-06-01 | Ericsson Inc. | Dual frequency band quadrifilar helix antenna systems and methods |
US5920292A (en) * | 1996-12-20 | 1999-07-06 | Ericsson Inc. | L-band quadrifilar helix antenna |
US5896113A (en) * | 1996-12-20 | 1999-04-20 | Ericsson Inc. | Quadrifilar helix antenna systems and methods for broadband operation in separate transmit and receive frequency bands |
FI113214B (fi) * | 1997-01-24 | 2004-03-15 | Filtronic Lk Oy | Yksinkertainen kahden taajuuden antenni |
US6724738B1 (en) | 1997-02-27 | 2004-04-20 | Motorola Inc. | Method and apparatus for acquiring a pilot signal in a CDMA receiver |
US6144649A (en) * | 1997-02-27 | 2000-11-07 | Motorola, Inc. | Method and apparatus for acquiring a pilot signal in a CDMA receiver |
JP3189735B2 (ja) * | 1997-05-08 | 2001-07-16 | 日本電気株式会社 | ヘリカルアンテナ |
FR2765732B1 (fr) * | 1997-07-04 | 1999-08-27 | France Telecom | Antenne en helice variable |
US6163300A (en) * | 1997-08-07 | 2000-12-19 | Tokin Corporation | Multi-band antenna suitable for use in a mobile radio device |
US6329962B2 (en) | 1998-08-04 | 2001-12-11 | Telefonaktiebolaget Lm Ericsson (Publ) | Multiple band, multiple branch antenna for mobile phone |
US6353443B1 (en) | 1998-07-09 | 2002-03-05 | Telefonaktiebolaget Lm Ericsson (Publ) | Miniature printed spiral antenna for mobile terminals |
US6166694A (en) * | 1998-07-09 | 2000-12-26 | Telefonaktiebolaget Lm Ericsson (Publ) | Printed twin spiral dual band antenna |
KR100291554B1 (ko) * | 1998-09-25 | 2001-07-12 | 김춘호 | 이동통신단말기용이중대역안테나 |
US6343208B1 (en) | 1998-12-16 | 2002-01-29 | Telefonaktiebolaget Lm Ericsson (Publ) | Printed multi-band patch antenna |
GB2344938A (en) | 1998-12-18 | 2000-06-21 | Nokia Mobile Phones Ltd | A multiple band, multiple co-axial element antenna |
JP2002176310A (ja) * | 2000-12-06 | 2002-06-21 | Nippon Antenna Co Ltd | 2共振アンテナ |
KR100406352B1 (ko) | 2001-03-29 | 2003-11-28 | 삼성전기주식회사 | 안테나 및 그 제조방법 |
AU2003233168A1 (en) * | 2002-06-06 | 2003-12-22 | Galtronics Ltd. | Multi-band improvements to a monopole helical_antenna |
WO2004001896A1 (en) * | 2002-06-25 | 2003-12-31 | E.M.W.Antenna Co., Ltd. | Multiple bands type antenna and method for producing the same |
US6897830B2 (en) * | 2002-07-04 | 2005-05-24 | Antenna Tech, Inc. | Multi-band helical antenna |
JP2005278220A (ja) * | 2005-05-20 | 2005-10-06 | Fec Inc | 携帯通信端末用のアンテナエレメント |
JP5094527B2 (ja) * | 2008-04-23 | 2012-12-12 | 京セラ株式会社 | 構造体、及びそれを用いた電池、並びに電子装置 |
CN102544684B (zh) * | 2011-11-23 | 2015-09-02 | 杨鹤鸣 | 收音电视一体化接收天线 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1270518A (en) * | 1969-01-28 | 1972-04-12 | Vorta Systems Inc | Omni-directional antenna |
AU2284370A (en) * | 1970-11-30 | 1972-06-01 | Normal-mode helix aerials | |
US4229743A (en) * | 1978-09-22 | 1980-10-21 | Shakespeare Company | Multiple band, multiple resonant frequency antenna |
GB2050701B (en) * | 1979-05-08 | 1983-08-03 | Secr Defence | Radio antennae structures |
US4349825A (en) * | 1980-06-16 | 1982-09-14 | Shmitka Clarence F | Antenna assembly for high frequency ranges |
US4442438A (en) * | 1982-03-29 | 1984-04-10 | Motorola, Inc. | Helical antenna structure capable of resonating at two different frequencies |
FR2570546B1 (fr) * | 1984-09-17 | 1987-10-23 | Europ Agence Spatiale | Antenne multifilaire helicoidale pour la transmission simultanee de plusieurs signaux d'emission et de reception vhf/uhf |
JPS6187434A (ja) * | 1984-10-04 | 1986-05-02 | Nec Corp | 携帯無線機 |
US4772895A (en) * | 1987-06-15 | 1988-09-20 | Motorola, Inc. | Wide-band helical antenna |
US5258771A (en) * | 1990-05-14 | 1993-11-02 | General Electric Co. | Interleaved helix arrays |
-
1992
- 1992-10-14 GB GB9221536A patent/GB2271670B/en not_active Expired - Fee Related
-
1993
- 1993-10-01 EP EP93307839A patent/EP0593185B1/de not_active Expired - Lifetime
- 1993-10-01 DE DE69329323T patent/DE69329323T2/de not_active Expired - Lifetime
- 1993-10-07 JP JP5251556A patent/JPH06204726A/ja active Pending
- 1993-10-13 IL IL107272A patent/IL107272A/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
IL107272A0 (en) | 1994-01-25 |
GB2271670A (en) | 1994-04-20 |
GB9221536D0 (en) | 1992-11-25 |
GB2271670B (en) | 1996-10-16 |
DE69329323D1 (de) | 2000-10-05 |
IL107272A (en) | 1997-04-15 |
EP0593185A1 (de) | 1994-04-20 |
JPH06204726A (ja) | 1994-07-22 |
DE69329323T2 (de) | 2001-03-29 |
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