WO2000008711A1 - Antenne mit grosser bandbreite - Google Patents
Antenne mit grosser bandbreite Download PDFInfo
- Publication number
- WO2000008711A1 WO2000008711A1 PCT/DE1999/002403 DE9902403W WO0008711A1 WO 2000008711 A1 WO2000008711 A1 WO 2000008711A1 DE 9902403 W DE9902403 W DE 9902403W WO 0008711 A1 WO0008711 A1 WO 0008711A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- antenna
- frequency
- antenna elements
- receiving signals
- transmitting
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
-
- 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
- H01Q5/45—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements using two or more feeds in association with a common reflecting, diffracting or refracting device
Definitions
- the present invention relates to an antenna for transmitting or receiving signals, with a first antenna element for transmitting or receiving signals of a specific frequency, the antenna element being of spiral design and being capacitively coupled to a high-frequency counterweight. Because of their compact design, such antennas can be used as internal antennas in telecommunications devices, such as cordless telephones.
- Spiral antenna elements for the antennas of telecommunication devices are known.
- the disadvantages of such antennas with a single spiral antenna element are, on the one hand, a small bandwidth, which only makes up approximately 5-7% of the carrier frequency and thus roughly corresponds to the signal bandwidth of existing mobile telecommunications systems, and, on the other hand, the ease of detuning due to capacitive influences Surroundings.
- capacitive influences are caused, for example, by installation conditions, metal parts or the human body and lead to detuning of the antennas and a reduction in the range which can be achieved both in the transmitting and in the receiving direction.
- the object of the present invention is thus to provide an antenna for transmitting and receiving signals, comprising a first antenna element for transmitting and receiving signals of a certain frequency, wherein the antenna element is formed helically and capacitively coupled to a Hochfre acid sequence counterweight which allows a wider bandwidth and / or better adaptation to the feed line system.
- an antenna for transmitting or receiving signals according to the appended claim 1, which has a first antenna element for transmitting or receiving signals of a specific frequency, the antenna element being of spiral design and connected to a high-frequency counterweight is coupled, characterized by at least one second antenna element for transmitting or receiving signals of the same frequency, the antenna elements being arranged in parallel.
- a higher bandwidth is achieved by the two or more antenna elements arranged in parallel, as a result of which the antenna according to the invention becomes less sensitive to capacitive influences from the environment. Furthermore, the two or more antenna elements can be better adapted to the high-frequency counterweight or the feed line system by means of higher currents induced at the base or feed point of the antenna and better distributed in terms of flat dimensions.
- the antenna elements are preferably coupled to the high-frequency counterweight by a capacitive coupling element.
- the capacitive coupling element can comprise conductor areas which are printed on opposite sides of the high-frequency counterweight.
- the antenna elements can comprise spirals.
- FIG. 1 shows a schematic top view of an antenna according to the present invention
- FIG. 2 shows a schematic side view of the antenna shown in FIG. 1 according to the present invention
- FIG. 3 shows a standing wave factor diagram of an antenna with one, two or three antenna elements
- FIG. 4 shows the return flow vaporization of the antenna shown in FIGS. 1 and 2,
- Figure 5 shows the foot impedance of the antenna shown in Figures 1 and 2
- FIG. 1 shows a top view of a preferred exemplary embodiment of an antenna 1 according to the present invention, which has three spiral antenna elements 2 arranged in parallel.
- the antenna elements 2 are coupled to a high-frequency counterweight 3, which can consist of a rectangular conductor surface or of a dielectric printed with circuit boards.
- the antenna elements 2 comprise spirals made of metal, the central axes of which are arranged parallel to one another and horizontally or perpendicularly to the plane of the high-frequency counterweight, as can be seen from FIGS. 1 and 2.
- the three antenna elements 2 are connected to a first conductor surface 4 printed on the high-frequency counterweight 3.
- the first circuit board 4 is on a side surface of the high frequency quenz counterweight printed on a corner.
- the first conductor surface 4 is connected via a feed point 7 to a feed line 8 which feeds signals received by the antenna elements 2 to a high-frequency module 9 or feeds signals to be sent out by the radio-frequency module 9 to the antenna elements 2.
- a second conductor area 5 which is insulated from the first conductor area 4, and on which the high-frequency module 9, one with the high frequency, is printed Module connected digital part 10 and a voltage supply 11 for the digital part 10 and the high-frequency module 9.
- a third conductor surface 6 is printed on the high-frequency counterweight, which corresponds approximately to the size of the conductor surface 5 and which is not located below the conductor surface 4, so that a capacitive coupling element consisting of the conductor surface 4 for coupling the antenna elements 2 is given to the high-frequency counterweight.
- the three antenna elements 2 are connected in parallel, i. H. they are each individually connected to the first conductor surface 4 and are connected to the high-frequency module 9 via a common feed point 7 on the first conductor surface 4.
- the antenna elements 2 can be adapted very well to the high-frequency counterweight 3 and to the approximately 50 ohm impedance of the feed line 8. A large useful bandwidth can be achieved by using 3 parallel antenna elements 2.
- the standing wave factor for an antenna with one, two and three spiral antenna elements 2 im Frequency band between 880 and 960 MHz (medium frequency 920 MHz) shown.
- the first curve A represents the standing wave factor for an antenna with one antenna element
- the second curve B represents the standing wave factor for an antenna with two antenna elements
- the third curve C represents the standing wave factor for an antenna with three antenna elements foi, fo 2 o 3 labeled in ⁇ points marked the respective beginning of the useful band and the f el, f_ and f ⁇ e the respective end of the useful band.
- Curve C shows the standing wave factor of an antenna, the structure of which corresponds to that of antenna 1 in FIG. 1 and in FIG. 2.
- Curve B has essentially the same structure, but only two parallel spiral antenna elements 2.
- the antenna of curve A has only one spiral antenna element.
- the bandwidth of the antenna with a spiral antenna element is approximately 6.2% (curve A)
- the bandwidth of an antenna with two antenna elements is approximately 16% (curve B)
- the use of several parallel spiral antenna elements thus considerably increases the useful bandwidth.
- the 3dB useful bandwidth is approximately 820-995 MHz.
- the foot impedance in the signal band is approximately (60 + ⁇ x9) ohms at 880 MHz and (58-1x13) ohms at 960 MHz.
- the standing wave ratio is about 1: 1.3 at 880 MHz and 1: 1.4 at 960 MHz.
- the antenna according to the invention is therefore universally suitable for mobile and compact stationary cordless terminals, base stations and relay stations of the various telecommunication standards in frequency ranges up to 3 GHz.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99952261A EP1101253B1 (de) | 1998-08-07 | 1999-08-02 | Antenne mit grosser bandbreite |
DE59901312T DE59901312D1 (de) | 1998-08-07 | 1999-08-02 | Antenne mit grosser bandbreite |
US09/778,534 US6404406B2 (en) | 1998-08-07 | 2001-02-07 | Antenna having a wide bandwidth |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19835878.4 | 1998-08-07 | ||
DE19835878A DE19835878A1 (de) | 1998-08-07 | 1998-08-07 | Antenne mit großer Bandbreite |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/778,534 Continuation US6404406B2 (en) | 1998-08-07 | 2001-02-07 | Antenna having a wide bandwidth |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000008711A1 true WO2000008711A1 (de) | 2000-02-17 |
Family
ID=7876870
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1999/002403 WO2000008711A1 (de) | 1998-08-07 | 1999-08-02 | Antenne mit grosser bandbreite |
Country Status (5)
Country | Link |
---|---|
US (1) | US6404406B2 (de) |
EP (1) | EP1101253B1 (de) |
CN (1) | CN1312965A (de) |
DE (2) | DE19835878A1 (de) |
WO (1) | WO2000008711A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100788676B1 (ko) * | 2005-12-21 | 2007-12-26 | 삼성전자주식회사 | 안테나 유니트, 안테나 유니트 제어 방법 및 그 안테나유니트를 갖는 모바일 단말기 |
EP2023436A1 (de) * | 2006-06-30 | 2009-02-11 | Palm, Inc. | Mobiles Endgerät mit zwei Antennen zur Verminderung der Belastung des Benutzers durch elektromagnetische Strahlung im Funkwellenbereich |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2583745A (en) * | 1948-12-02 | 1952-01-29 | Miller Rody | High-frequency antenna |
DE4205084A1 (de) * | 1992-02-17 | 1993-09-02 | Karl Harms Handels Gmbh & Co K | Vorrichtung zum empfangen elektromagnetischer wellen, insbesondere fuer diebstahlsicherungssysteme |
US5257032A (en) * | 1991-01-24 | 1993-10-26 | Rdi Electronics, Inc. | Antenna system including spiral antenna and dipole or monopole antenna |
DE19639642A1 (de) * | 1995-09-29 | 1997-04-03 | Motorola Inc | Antennenvorrichtung für eine drahtlose Kommunikationsvorrichtung |
DE19614362C1 (de) * | 1996-04-11 | 1997-07-31 | Siemens Ag | Antenne für ein Diebstahlschutzsystem eines Kraftfahrzeugs |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL279396A (de) | 1961-06-13 | |||
GB2050701B (en) | 1979-05-08 | 1983-08-03 | Secr Defence | Radio antennae structures |
US5343214A (en) * | 1983-09-23 | 1994-08-30 | The Allen Telecom Group, Inc. | Cellular mobile communications antenna |
US5041842A (en) * | 1990-04-18 | 1991-08-20 | Blaese Herbert R | Helical base station antenna with support |
US5345248A (en) * | 1992-07-22 | 1994-09-06 | Space Systems/Loral, Inc. | Staggered helical array antenna |
AU680497B2 (en) * | 1993-06-30 | 1997-07-31 | Nec Corporation | Antenna apparatus having individual transmitting and receiving antenna elements for different frequencies |
US5714959A (en) * | 1994-06-09 | 1998-02-03 | Delco Electronics Corporation | Glass patch cellular antenna |
JP3669117B2 (ja) * | 1997-07-23 | 2005-07-06 | 松下電器産業株式会社 | ヘリカルアンテナ及びその製造方法 |
US6215451B1 (en) * | 1997-11-17 | 2001-04-10 | Allen Telecom Inc. | Dual-band glass-mounted antenna |
NO993414L (no) * | 1998-07-22 | 2000-01-23 | Vistar Telecommunications Inc | Integrert antenne |
US6243052B1 (en) * | 1999-11-16 | 2001-06-05 | Harris Corporation | Low profile panel-configured helical phased array antenna with pseudo-monopulse beam-control subsystem |
-
1998
- 1998-08-07 DE DE19835878A patent/DE19835878A1/de not_active Withdrawn
-
1999
- 1999-08-02 WO PCT/DE1999/002403 patent/WO2000008711A1/de active IP Right Grant
- 1999-08-02 DE DE59901312T patent/DE59901312D1/de not_active Expired - Fee Related
- 1999-08-02 EP EP99952261A patent/EP1101253B1/de not_active Expired - Lifetime
- 1999-08-02 CN CN99809449A patent/CN1312965A/zh active Pending
-
2001
- 2001-02-07 US US09/778,534 patent/US6404406B2/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2583745A (en) * | 1948-12-02 | 1952-01-29 | Miller Rody | High-frequency antenna |
US5257032A (en) * | 1991-01-24 | 1993-10-26 | Rdi Electronics, Inc. | Antenna system including spiral antenna and dipole or monopole antenna |
US5457469A (en) * | 1991-01-24 | 1995-10-10 | Rdi Electronics, Incorporated | System including spiral antenna and dipole or monopole antenna |
DE4205084A1 (de) * | 1992-02-17 | 1993-09-02 | Karl Harms Handels Gmbh & Co K | Vorrichtung zum empfangen elektromagnetischer wellen, insbesondere fuer diebstahlsicherungssysteme |
DE19639642A1 (de) * | 1995-09-29 | 1997-04-03 | Motorola Inc | Antennenvorrichtung für eine drahtlose Kommunikationsvorrichtung |
DE19614362C1 (de) * | 1996-04-11 | 1997-07-31 | Siemens Ag | Antenne für ein Diebstahlschutzsystem eines Kraftfahrzeugs |
Non-Patent Citations (1)
Title |
---|
HAAPALA P ET AL: "DUAL FREQUENCY HELICAL ANTENNAS FOR HANDSETS", IEEE VEHICULAR TECHNOLOGY CONFERENCE,US,NEW YORK, IEEE, vol. CONF. 46, pages 336-338, XP000594306, ISBN: 0-7803-3158-3 * |
Also Published As
Publication number | Publication date |
---|---|
EP1101253B1 (de) | 2002-04-24 |
EP1101253A1 (de) | 2001-05-23 |
US6404406B2 (en) | 2002-06-11 |
DE19835878A1 (de) | 2000-02-17 |
US20010050655A1 (en) | 2001-12-13 |
CN1312965A (zh) | 2001-09-12 |
DE59901312D1 (de) | 2002-05-29 |
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