EP0580590A1 - Antennenanordnung. - Google Patents
Antennenanordnung.Info
- Publication number
- EP0580590A1 EP0580590A1 EP92904728A EP92904728A EP0580590A1 EP 0580590 A1 EP0580590 A1 EP 0580590A1 EP 92904728 A EP92904728 A EP 92904728A EP 92904728 A EP92904728 A EP 92904728A EP 0580590 A1 EP0580590 A1 EP 0580590A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- antenna
- arrangement according
- antenna arrangement
- reception
- frequency band
- 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
- 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
-
- 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
Definitions
- the invention relates to an antenna arrangement for receiving signals in a first and a second frequency band with mutually orthogonal wave fields.
- one of the two individual probes as an active antenna for the long, medium and / or Use shortwave (LMK) reception and adapt it if necessary to be able to use the antenna provided for VHF reception with two individual probes for LMK reception.
- LMK Use shortwave
- a capacitive separation of one of the individual antennas from the rest of the antenna arrangement is necessary.
- the capacitive separation means that both FM and LMK reception are not optimal.
- compromises would have to be made regarding the alignment of the individual antennas in relation to the vertically and horizontally polarized wave fields, which would adversely affect the efficiency of both FM and LMK reception.
- the invention is therefore based on the object of specifying an antenna arrangement which enables optimum reception quality for the reception of signals in different frequency bands and with wave fields polarized in different directions.
- a first antenna for receiving signals in the first frequency band has two individual probes which couple to the displacement current of the same, essentially resonant circuit occurring on a conductive structure, and in that a second antenna for receiving Signals in the second frequency band with a preferably orthogonal wave field polarized differently from the wave field of the first frequency band are provided.
- the antenna arrangement according to the invention enables signals to be received optimally in both frequency bands and with differently polarized wave fields, without having to make a compromise unsatisfactory for the efficiency.
- the first antenna is preferably used for receiving essentially horizontally polarized wave fields and the second antenna for receiving essentially vertically polarized wave fields. This additional measure enables a further optimal adaptation of the antennas to the reception of differently polarized wave fields regardless of compromises. This further improves the reception properties of the antennas.
- the efficiency of the second antenna is additionally improved in that the second antenna is arranged orthogonally to a horizontal outer edge of the conductive structure.
- the edge effect with a compression of the field lines can also be used in this way to improve the reception properties of the second antenna.
- the second antenna is arranged between the individual probes of the first antenna and in particular in the middle between the individual probes of the first antenna.
- the first antenna is or is provided with the at least two individual probes for reception in the FM frequency range and the second antenna for reception in the LMK frequency range.
- the antenna arrangement according to the invention can be used particularly advantageously in connection with mobile reception.
- the conductive structure, on which an essentially resonant circuit occurs, is or are preferably the metal body or electrically conductive parts of a motor vehicle.
- the individual probes of the first antenna and / or the second antenna can preferably be short antennas, which enable a compact arrangement, in particular with regard to integrated antenna arrangements for mobile reception. Furthermore, it is advantageous if 'the first and / or the second antenna is an active antenna.
- Another advantageous embodiment of the invention consists in interconnecting the signals received in the two frequency bands behind the active antenna elements. This also makes it possible to decouple the two antennas and to avoid a separating capacitance with its effect which is harmful to FM and / or LMK reception.
- the first and second antennas may preferably be in a plastic bumper on the bow or rear of the vehicle, however can also be integrated in a spoiler on the rear of the vehicle or on the vehicle roof.
- the antenna arrangement according to the invention can advantageously be used in connection with a diversity reception system, since the first and second antennas are decoupled and can be optimally designed for differently polarized wave fields.
- Fig. 1 is a schematic representation of the antenna arrangement according to the invention using the example of an integrated bumper antenna for FM and LMK reception and
- Fig. 2 is an equivalent circuit diagram to explain the operation and advantages of the antenna arrangement according to the invention.
- a first antenna has antenna probes 1, 2 with roof capacitances 3, 4, a ⁇ / 2 line 5 connecting the antenna probes 1 and 2, which is arranged as a detour line near a body panel 6 which is at ground potential, and extension inductors 7 , 8 in the form of coils.
- the individual antennas of the first antenna are not necessary, but preferably short antennas, as probes, they are therefore also referred to as antenna probes.
- the antenna probes 1, 2 are essentially orthogonal to the body edge.
- One of the two axes that span the surfaces of the roof capacitors 3, 4 is essentially parallel to the body edge.
- the normal vector of this surface is thus orthogonal to the body edge and points in the direction of the extended antenna.
- the antenna signal is amplified in an amplifier 9 and fed via a coaxial cable 10 to a receiving circuit, not shown.
- a receiving circuit not shown.
- FIG. 2 An equivalent circuit diagram is shown in FIG. 2, the antenna and circuit elements which correspond to those in FIG. 1 being provided with the same reference symbols and should not be explained again.
- an antenna probe for example antenna probe 2
- This separation capacitance which is shown schematically in FIG. 2 and is provided with the reference symbol 11, causes an asymmetry in the first antenna arrangement provided for VHF reception with the two antenna probes 1 and 2.
- the separation capacitance 11 is for the Antenna probe 2 provided for the LMK reception in series with a capacitance 12 present through the 1/2 line, and thus represents a harmful parallel capacitance to the effective antenna capacitance 13. Because of this voltage division which occurs as a result, the efficiency of the LMK reception used antenna probe 2 significantly reduced. If one of the two antenna probes 1 or 2 of the first antenna intended for VHF reception is also used for reception in a different frequency range, for example the LMK frequency band, the two antennas therefore influence one another for receiving signals in the different ones Reception areas mutually, so that an optimal reception is not possible in the FM or LMK frequency range.
- the reception or antenna elements are therefore provided separately for FM and LMK reception, so that the FM and LMK reception components are separated and thus have a mutual negative influence on the FM and LMK reception. Reception arrangement or the acceptance of unsatisfactory compromises is avoided.
- an additional antenna 14 with a roof capacitance 15 connected to the amplifier 9 is provided (cf. FIG. 1).
- the arrangement according to the invention also has the following advantages:
- Fig. 1 the horizontal polarization direction of the FM wave field is indicated by the arrow E u ⁇ w , and with an arrow orthogonal to the horizontal direction of the FM wave field, the vertical polarization direction of the LMK wave field E LMK is shown schematically.
- the horizontal arrangement of the first antenna consisting of antenna probes 1 and 2, has an optimal coupling to the electrical field vector of the horizontally polarized VHF wave field. If the first antenna with antenna probes 1 and 2 were therefore also used to receive the LMK wave field, the efficiency would be very low, since the first antenna with antenna probes 1 and 2 only has a small component to it would couple the vertical e-field vector of the LMK wave field.
- the first antenna with antenna probes 1 and 2 in such a way that the LMK wave field could be received better. In any case, however, compromises would have to be made with regard to the arrangement of the antennas, so that both FM and LMK reception are unsatisfactory.
- the first antenna i. H. antenna probes 1 and 2 can be optimally arranged on vertical edges of the vehicle, for example on vertical edges of the rear of the vehicle or the front of the vehicle when using, for example, a bumper antenna in order to achieve good efficiency for VHF reception.
- the antenna probes 1 and 2 of the first antenna for VHF reception are therefore located at the greatest field strength of the displacement current of the resonant body excitation due to the horizontally polarized VHF wave field.
- the second antenna 14 for the LMK reception is in particular oriented orthogonally to a vehicle edge.
- the second antenna 14 for the LMK reception is in the Middle between the individual probes 1 and 2 of the first antenna intended for VHF reception, at a short distance or a small antenna height ( ⁇ _ - at 100 MHz) in front of the conductive body surface.
- the second antenna 14 provided for the LMK reception therefore optimally couples to the displacement current between the electrically conductive body 6 and the ground 18, preferably to a horizontal edge of the motor vehicle.
- the horizontally polarized VHF wave field in this arrangement of the second antenna 14 provided for LMK reception has very small field strengths, so that the second antenna probe 14 provided for LMK reception has the function of the first one for VHF reception provided antenna with the antenna probes 1 and 2 is not affected.
- the antenna arrangement according to the invention and the alignment and arrangement of the first and second antennas for VHF and LMK reception enable extensive electrical decoupling of these first and second antennas because the VHF and LMK wave fields which are polarized orthogonally to one another as well the resonant excitation of the vehicle body for the VHF frequencies is optimally used.
- the roof capacitance 15 of the LMK antenna probe is designed with approximately three times the area of the roof capacitance 3 or 4 of an FM antenna probe 1 or 2.
- the invention and its advantages were explained using the exemplary embodiment of a bumper antenna.
- numerous modifications and refinements of the invention are possible for the person skilled in the art without thereby departing from the inventive concept.
- all antenna elements and Components of the antenna arrangement according to the invention can be foamed in a foam core 17, or a dielectric can be used to increase the roof capacities 3 and 4 of the first antenna provided for VHF reception.
- the second antenna 14 intended for LMK reception is mounted orthogonally to an upper horizontal body edge.
Landscapes
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Details Of Aerials (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4116232 | 1991-05-17 | ||
DE19914116232 DE4116232A1 (de) | 1991-05-17 | 1991-05-17 | Antennenanordnung |
PCT/EP1992/000360 WO1992021160A1 (de) | 1991-05-17 | 1992-02-20 | Antennenanordnung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0580590A1 true EP0580590A1 (de) | 1994-02-02 |
EP0580590B1 EP0580590B1 (de) | 1996-02-07 |
Family
ID=6431922
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92904728A Expired - Lifetime EP0580590B1 (de) | 1991-05-17 | 1992-02-20 | Antennenanordnung |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0580590B1 (de) |
JP (1) | JPH06511604A (de) |
DE (2) | DE4116232A1 (de) |
WO (1) | WO1992021160A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6870510B2 (en) | 2000-09-12 | 2005-03-22 | Robert Bosch Gmbh | Bumper-aerial assembly |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19636477C2 (de) * | 1996-09-07 | 1999-11-25 | Hirschmann Richard Gmbh Co | Fahrzeugantenneneinrichtung |
DE59813996D1 (de) * | 1997-01-15 | 2007-06-21 | Menzolit Fibron Gmbh | Faserverstärktes Kunststoff-Formteil mit integrierter Antenne |
DE19729972A1 (de) * | 1997-07-12 | 1999-01-14 | Menzolit Fibron Gmbh | Faserverstärktes Kunststoff-Formteil mit integrierter Antenne |
DE19962736C2 (de) * | 1999-12-23 | 2001-11-22 | Hirschmann Electronics Gmbh | Fahrzeugantenne |
FR2884471B1 (fr) * | 2005-04-18 | 2007-07-20 | Plastic Omnium Cie | Piece de renfort pour vehicule automobile et utilisation d'une telle piece comme antenne |
US7425925B2 (en) | 2006-02-27 | 2008-09-16 | Nissan Technical Center North America, Inc. | Vehicle security system |
US7234741B1 (en) | 2006-03-07 | 2007-06-26 | Nissan Technical Center North America, Inc. | Vehicle bumper assembly |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3977004A (en) * | 1975-06-16 | 1976-08-24 | The United States Of America As Represented By The Secretary Of The Navy | Aircraft VLF/LF/MF window antenna receiving system |
FR2552587B1 (fr) * | 1983-09-28 | 1986-04-18 | Dassault Avions | Antenne commutable pour les gammes de frequences vhf et uhf |
US4823140A (en) * | 1984-06-18 | 1989-04-18 | Asahi Glass Company Ltd. | Antenna device for a television receiver mounted on an automobile |
US4845505A (en) * | 1987-02-13 | 1989-07-04 | Toyota Jidosha Kabushiki Kaisha | Automobile antenna system for diversity reception |
US4868577A (en) * | 1987-12-23 | 1989-09-19 | Wingard Jefferson C | Multiband television/communications antenna |
DE3802130A1 (de) * | 1988-01-26 | 1989-08-03 | Hirschmann Radiotechnik | Antennensystem fuer den rundfunkempfang in kraftfahrzeugen |
DE3802131A1 (de) * | 1988-01-26 | 1989-08-03 | Hirschmann Radiotechnik | Antennensystem fuer den rundfunkempfang in kraftfahrzeugen |
DE8901792U1 (de) * | 1989-02-16 | 1989-03-30 | Blaupunkt-Werke Gmbh, 3200 Hildesheim, De | |
DE3907493A1 (de) * | 1989-03-08 | 1990-09-20 | Lindenmeier Heinz | Scheibenantenne mit antennenverstaerker |
DE3911178A1 (de) * | 1989-04-06 | 1990-10-11 | Lindenmeier Heinz | Scheibenantennensystem mit antennenverstaerker |
DE4003385C2 (de) * | 1990-02-05 | 1996-03-28 | Hirschmann Richard Gmbh Co | Antennenanordnung |
-
1991
- 1991-05-17 DE DE19914116232 patent/DE4116232A1/de not_active Withdrawn
-
1992
- 1992-02-20 JP JP4504905A patent/JPH06511604A/ja active Pending
- 1992-02-20 EP EP92904728A patent/EP0580590B1/de not_active Expired - Lifetime
- 1992-02-20 WO PCT/EP1992/000360 patent/WO1992021160A1/de active IP Right Grant
- 1992-02-20 DE DE59205310T patent/DE59205310D1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9221160A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6870510B2 (en) | 2000-09-12 | 2005-03-22 | Robert Bosch Gmbh | Bumper-aerial assembly |
Also Published As
Publication number | Publication date |
---|---|
DE4116232A1 (de) | 1992-11-19 |
WO1992021160A1 (de) | 1992-11-26 |
EP0580590B1 (de) | 1996-02-07 |
DE59205310D1 (de) | 1996-03-21 |
JPH06511604A (ja) | 1994-12-22 |
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