EP0710403A1 - Antennenanordnung - Google Patents
AntennenanordnungInfo
- Publication number
- EP0710403A1 EP0710403A1 EP94918817A EP94918817A EP0710403A1 EP 0710403 A1 EP0710403 A1 EP 0710403A1 EP 94918817 A EP94918817 A EP 94918817A EP 94918817 A EP94918817 A EP 94918817A EP 0710403 A1 EP0710403 A1 EP 0710403A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- arrangement according
- antenna arrangement
- antenna
- radiator
- monopole
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
- H01Q9/40—Element having extended radiating surface
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
- H01Q1/325—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle
- H01Q1/3283—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle side-mounted antennas, e.g. bumper-mounted, door-mounted
Definitions
- the invention relates to an antenna arrangement with a monopole antenna, which has an antenna radiator and an electrical counterweight, the radiator and counterweight being connected at opposite feed points to a conductor of a feed line.
- Such antenna arrangements are known for example from DE 42 20 654-A1.
- Antenna arrangements of this type are provided for attachment to one of the window panes of a motor vehicle.
- Antenna arrangements of this type have the disadvantage that, inter alia, they radiate into or through the passenger compartment of the motor vehicle in order to obtain an approximately round azimuthal antenna characteristic. This results in a significant increase in the electromagnetic field strength inside the vehicle. If there is such an antenna arrangement, for example on the rear window, then electric field strengths of over 100 V / m are measured in the rear area of the passenger compartment of the motor vehicle. According to the recommendations of the VDE, however, 40 V / m should not be exceeded.
- the object of the invention is therefore to create an antenna arrangement of the type mentioned at the outset, which has an approximately round azimuthal antenna characteristic, without radiating through the passenger compartment.
- this object is achieved by providing at least two monopole antennas connected in parallel, which are connected to one another via a power transformer.
- Preferred embodiments of the invention are the subject of the dependent claims.
- a largely round azimuth diagram can also be generated if the antennas are attached below the window height of the passenger compartment.
- the provision of a plurality of monopole antennas connected in parallel enables the antennas to be able to produce a largely round azimuth diagram even when attached to the lower peripheral chassis area, although the antennas are arranged in front of metallic chassis parts which reflect the electromagnetic antenna radiation. In this way, the passenger compartment is shielded from the antenna radiation by the metallic chassis parts of the vehicle.
- the antenna arrangement according to the invention preferably has a line transformer which is designed using stripline technology.
- the line transformer fulfills the task of matching the characteristic impedance, which is changed by connecting a plurality of monopole antennas in parallel, to the characteristic impedance of the supply line.
- the supply cable and the connection line (s) between the monopole antennas are advantageously designed in the form of a coaxial cable.
- the implementation of the line transformer using stripline technology enables a simple, inexpensive to produce, robust and space-saving type of transformation.
- the line transformer is arranged on the electrical counterweight of an antenna. This has the advantage that the line transformer is particularly space-saving and robust.
- the radiator has the shape of an isosceles triangle. This has the advantage that the radiator has a frequency range which is larger by a factor of 1.5 to 2 than that of a rectangular radiator, as is known from the prior art.
- the edges of the radiator and of the counterweight are rounded.
- Such a shape of the radiator and the counterweight also causes a broadening of the frequency range of a monopole antenna.
- the antennas are accommodated in at least one of the plastic bumpers of a motor vehicle.
- the antennas are arranged on opposite sides of the motor vehicle.
- a largely round azimuth diagram is achieved regardless of the individual shape of the chassis of the motor vehicle.
- the radiators essentially have the length lambda / 4 in the operating frequency range. This ensures that the length of the Is optimally matched to the operating frequency range.
- the operating frequency range largely corresponds to the frequency range assigned to the electromagnetic decimeter waves.
- the antennas are arranged at a distance from the chassis of the motor vehicle which corresponds to Lambda / 4 of the operating frequency range. It is thereby achieved that the metallic chassis parts of the motor vehicle located behind an antenna act as reflectors for the electromagnetic waves emitted by the antenna. To this
- the individual antennas are designed as metal foils welded into plastic foils. This has the advantage that the antennas can be manufactured particularly inexpensively and at the same time robustly.
- the individual antennas are designed as printed circuit boards in printing technology. This has the advantage that the individual antennas and the line transformer can be manufactured very inexpensively and very reproducibly
- more than two antennas are interconnected in a tree structure. This ensures that the antennas perform optimally.
- more than two antennas are interconnected in a line. With this type of interconnection of the antennas, a very good power output is achieved. In addition, the simpler cable routing in the automobile is advantageous.
- FIG. 2 shows a preferred embodiment of the antenna arrangement according to the invention.
- the antenna radiator 1 shows an antenna radiator 1 according to the invention, which has the shape of an isosceles triangle with rounded base edges 2 and 3.
- the base edge 4 of the radiator 1 is arranged parallel to the upper edge 5 of the electrical counterweight 6.
- the electrical counterweight 6 is essentially rectangular, its edges 7, 7 ', 7 "and 7" • being rounded.
- the longitudinal edge 5 of the electrical counterweight 6 is longer than the base edge 4 of the antenna radiator 1.
- the antenna radiator 1 and the electrical counterweight 6 are connected at opposite feed points 8 and 9 to a feed line 10 designed as a coaxial cable.
- the antenna radiator 1 and the electrical counterweight 6 are designed as a metal foil which is welded between two plastic foils.
- FIG. 2 there is a first antenna antenna 1 and an electrical counterweight 6 existing monopole antenna is electrically connected via a feed line 10 to a second monopole antenna consisting of an antenna radiator 11 and an electrical counterweight 12.
- the antenna radiator 11 and the electrical counterweight 12 are electrically connected to a stripline 16, which takes into account the wave resistance and is attached to the electrical counterweight 12, at opposite feed points 13 and 14.
- a line transformer 15 designed in stripline technology is electrically connected to the supply line 10 via the contact point 17 and to the supply line 19 via the contact point 18.
- the line transformer 15 is also arranged on the electrical counterweight 12 of the second monopole antenna.
Landscapes
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Support Of Aerials (AREA)
- Details Of Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4324480 | 1993-07-21 | ||
DE4324480A DE4324480C2 (de) | 1993-07-21 | 1993-07-21 | Antennenanordnung |
PCT/EP1994/001753 WO1995003640A1 (de) | 1993-07-21 | 1994-05-30 | Antennenanordnung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0710403A1 true EP0710403A1 (de) | 1996-05-08 |
EP0710403B1 EP0710403B1 (de) | 1997-03-19 |
Family
ID=6493369
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94918817A Expired - Lifetime EP0710403B1 (de) | 1993-07-21 | 1994-05-30 | Antennenanordnung |
Country Status (5)
Country | Link |
---|---|
US (1) | US5793337A (de) |
EP (1) | EP0710403B1 (de) |
DE (2) | DE4324480C2 (de) |
ES (1) | ES2098960T3 (de) |
WO (1) | WO1995003640A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BR9608617A (pt) * | 1995-06-02 | 1999-05-04 | Ericsson Ge Mobile Inc | Antena monopolo impressa |
US5709832A (en) * | 1995-06-02 | 1998-01-20 | Ericsson Inc. | Method of manufacturing a printed antenna |
WO1996038879A1 (en) * | 1995-06-02 | 1996-12-05 | Ericsson Inc. | Printed monopole antenna |
US6335706B1 (en) * | 1999-10-04 | 2002-01-01 | Paul Gordon Elliot | Method to feed antennas proximal a monopole |
FI113103B (fi) * | 1999-11-03 | 2004-02-27 | Co Jot Oy | Levyantenni |
DE10221877A1 (de) | 2002-05-16 | 2003-12-18 | Kathrein Werke Kg | Antennenanordnung |
ES2589144T3 (es) | 2007-10-08 | 2016-11-10 | Tyco Fire & Security Gmbh | Antena de parche de RFID con tierra de referencia coplanar y tierras flotantes |
JP5370141B2 (ja) * | 2009-12-28 | 2013-12-18 | 富士通株式会社 | アンテナ装置 |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2141489A (en) * | 1935-12-17 | 1938-12-27 | Ass Telephone & Telegraph Co | High frequency current generating and distribution system |
US3039096A (en) * | 1950-08-09 | 1962-06-12 | United Aircraft Corp | Stabilized scanning radar antenna |
US3039095A (en) * | 1957-01-14 | 1962-06-12 | Josephson Bengt Adolf Samuel | Broadband aircraft foil antenna |
US3739392A (en) * | 1971-07-29 | 1973-06-12 | Sperry Rand Corp | Base-band radiation and reception system |
JPS6047523A (ja) * | 1983-08-26 | 1985-03-14 | Nippon Telegr & Teleph Corp <Ntt> | 車載形移動局アンテナ |
US4675685A (en) * | 1984-04-17 | 1987-06-23 | Harris Corporation | Low VSWR, flush-mounted, adaptive array antenna |
US4719470A (en) * | 1985-05-13 | 1988-01-12 | Ball Corporation | Broadband printed circuit antenna with direct feed |
GB2193379B (en) * | 1986-07-24 | 1990-04-18 | Gen Electric Plc | An antenna |
US4814777A (en) * | 1987-07-31 | 1989-03-21 | Raytheon Company | Dual-polarization, omni-directional antenna system |
DE3836046A1 (de) * | 1987-10-31 | 1989-05-11 | Hirschmann Radiotechnik | Empfangsverfahren und empfangs-antennensystem zur durchfuehrung des verfahrens |
DE3803440A1 (de) * | 1988-02-05 | 1989-08-17 | Bosch Gmbh Robert | Funksende- und -empfangsantenne |
DE3927681A1 (de) * | 1989-08-22 | 1991-03-14 | Hirschmann Richard Gmbh Co | Verfahren zur zwischenverstaerkung von digitalen signalen sowie zwischenverstaerker fuer digitale signale |
GB8921773D0 (en) * | 1989-09-27 | 1989-11-08 | Marconi Co Ltd | Monopole antenna |
DE4003385C2 (de) * | 1990-02-05 | 1996-03-28 | Hirschmann Richard Gmbh Co | Antennenanordnung |
GB9103737D0 (en) * | 1991-02-22 | 1991-04-10 | Pilkington Plc | Antenna for vehicle window |
EP0584154A1 (de) * | 1991-05-17 | 1994-03-02 | Richard Hirschmann GmbH & Co. | Antennenanordnung |
DE4121333A1 (de) * | 1991-06-25 | 1993-01-14 | Hagenuk Telecom Gmbh | Folienantenne |
-
1993
- 1993-07-21 DE DE4324480A patent/DE4324480C2/de not_active Expired - Fee Related
-
1994
- 1994-05-30 DE DE59402169T patent/DE59402169D1/de not_active Expired - Lifetime
- 1994-05-30 EP EP94918817A patent/EP0710403B1/de not_active Expired - Lifetime
- 1994-05-30 ES ES94918817T patent/ES2098960T3/es not_active Expired - Lifetime
- 1994-05-30 WO PCT/EP1994/001753 patent/WO1995003640A1/de active IP Right Grant
-
1996
- 1996-01-19 US US08/588,916 patent/US5793337A/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9503640A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE4324480C2 (de) | 1997-07-17 |
EP0710403B1 (de) | 1997-03-19 |
US5793337A (en) | 1998-08-11 |
DE4324480A1 (de) | 1995-01-26 |
WO1995003640A1 (de) | 1995-02-02 |
ES2098960T3 (es) | 1997-05-01 |
DE59402169D1 (de) | 1997-04-24 |
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