EP1239543A1 - Antenne plate pour communication mobile via satellites - Google Patents

Antenne plate pour communication mobile via satellites Download PDF

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Publication number
EP1239543A1
EP1239543A1 EP02002836A EP02002836A EP1239543A1 EP 1239543 A1 EP1239543 A1 EP 1239543A1 EP 02002836 A EP02002836 A EP 02002836A EP 02002836 A EP02002836 A EP 02002836A EP 1239543 A1 EP1239543 A1 EP 1239543A1
Authority
EP
European Patent Office
Prior art keywords
antenna
conductor
impedance
symmetry
connection point
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
EP02002836A
Other languages
German (de)
English (en)
Other versions
EP1239543B1 (fr
Inventor
Heinz Lindenmeier
Jochen Hopf
Leopold Reiter
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.)
Fuba Automotive GmbH and Co KG
Original Assignee
Fuba Automotive GmbH and Co KG
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 Fuba Automotive GmbH and Co KG filed Critical Fuba Automotive GmbH and Co KG
Publication of EP1239543A1 publication Critical patent/EP1239543A1/fr
Application granted granted Critical
Publication of EP1239543B1 publication Critical patent/EP1239543B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01Q9/44—Resonant antennas with a plurality of divergent straight elements, e.g. V-dipole, X-antenna; with a plurality of elements having mutually inclined substantially straight portions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
    • H01Q21/26—Turnstile or like antennas comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre
    • 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
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/26—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength
    • 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
    • H01Q9/32—Vertical arrangement of element
    • H01Q9/36—Vertical arrangement of element with top loading
    • 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
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Definitions

  • the invention relates to an antenna for mobile satellite communication on an in essentially horizontally oriented conductive base consisting essentially of linear conductor parts and an antenna connection point.
  • Antennas of this type are known from DE 40 08 505.8.
  • This antenna consists of crossed horizontal dipoles with a V-shape Dipole halves inclined at the bottom, consisting of linear conductor parts, at an angle mechanically fixed at 90 degrees to each other and at the top one on a horizontal Oriented conductive base fixed linear vertical conductor are attached.
  • the required antenna gain in the range of low elevation angles of 20 to 30 degrees only heavy and due to the V-shaped horizontal dipoles, which are inclined downwards Function naturally a sufficiently large distance from the conductive base demand, in no case - as required for mobile use - with a very small height of the Antennas can be realized.
  • the invention is therefore based on the object of first specifying an antenna which it allows the ratio of antenna gain in the low elevation range to antenna gain in the zenith angle range in an azimuthal main plane as required and which enables a directional diagram by combining several such antennas according to the gain requirements for circular polarized satellite communications Realize waves with a small electrical height of the antenna.
  • Antennas according to the invention can in particular in their training form for satellite communication can be produced particularly easily and therefore inexpensively. Also suitable due to their structure over a conductive base and their small size Height especially for use on vehicles. Another advantage is that they can be extended to the combination antenna for terrestrial communication, what with the saving of installation space in motor vehicles goes hand in hand. Another advantage is there that measures can be taken to ensure that in the presence of Discontinuities in the conductive base surface or in its skew, such as roof pitch or roof edge, the disturbance of the directional diagram resulting therefrom can be largely offset.
  • Fig. 1 shows the basic shape of an antenna according to the invention consisting of one with the conductive base 1 formed high-frequency conductive ring structure 2 with Ladder parts with a substantial horizontal extent 4b and ladder parts with a substantial one vertical extension 4a within a plane 0, which is on the conductive base surface 1 is vertical.
  • An essential function according to the present invention takes on here the impedance 7, which is in an interruption point of the high-frequency conductive Ring structure 2 in the impedance connection point 6 with the first impedance connection point 6a and the second impedance connection point 6b is introduced.
  • the design of the predetermined ratio of antenna gain in the zenith angle range The basic requirement is to gain antennas in the area of low elevation angles Antennas for satellite communication. Consequently, the adjustability is vertical and horizontal shot the basis of the present invention.
  • the embodiment of the invention is the antenna connection point 5 on the conductive base area 1 formed and the antenna signals are between a first antenna connection point 5a and a second antenna connection point 5b are coupled out of the ring structure 2.
  • To one Antenna connection point 5 formed in this way can be coupled to asymmetrical lines, as shown in Fig.2.
  • the ring structure 2 formed symmetrically to a vertical line of symmetry 8.
  • the antenna contains thus two identical impedances 7, which are also symmetrical to the vertical line of symmetry 8 are positioned, and a mirrored to the first antenna connection point 5 is introduced Has antenna connection point 5 'on the conductive base 1.
  • the coupling of the Ring structure 2 on the conductive base 1 enables, as shown in Fig. 3b, the advantageous embodiment of a resymmetry network 9, which e.g. with the help of a ⁇ / 2 detour line the signals can be realized.
  • the decoupling is symmetrical conductive base area 1 forming asymmetrical receive voltages Uu, the Direction indicated by arrows in the figures is done by simple Parallel connection of the unbalanced lines in Fig. 3b, the lengths of which are Distinguish ⁇ / 2.
  • the summarized symmetrical receive voltage ⁇ Us is at Collection point 11 in Fig. 3b available.
  • Such a resymmetry network 9 can be very advantageous and inexpensive in printed form Microstripline technology can be carried out.
  • different Design of impedance 7 the vertical diagrams shown in FIG level 0.
  • the impedance 7 can be positioned within the ring structure 2 can be freely selected within wide limits, with an extended conductor length for the in the Figures 3a and 3b marked section 16 of ⁇ / 4 proves to be particularly favorable.
  • Setting the right one Vertical diagram can be used within wide limits for different lengths of section 16 by appropriate choice of impedance 7.
  • FIG Achieve directional diagrams at a height 14 of less than a quarter wavelength With a preferred transverse dimension 15 of a little less than half a wavelength can be shown in FIG Achieve directional diagrams at a height 14 of less than a quarter wavelength.
  • the elevation diagrams denoted D4 and D5 result in Fig. 11. These have the property of an angular range at medium elevation largely hide.
  • the inductance value of the directional diagram D5 is larger chosen as for the directional diagram D4.
  • capacitances as an impedance 7 for use this property of the antenna is essential.
  • asymmetrical voltages Uu proves to be advantageous at the antenna connection points 5, which is used in Fig. 3c in that in a Summation circuit 19 in addition to a resymmetry network 9 for decoupling the unbalanced receive voltages Uu a power divider 21 for decoupling the symmetrical receive voltages Us is present.
  • a power divider 21 for decoupling the symmetrical receive voltages Us is present.
  • a further advantageous decoupling of the symmetrical voltage Us can, as in FIG. at an antenna connection point 5 arranged in the vertical line of symmetry 8.
  • FIG. 4b (detail from FIG. 4a) there is a two-wire line 24 to the first antenna connection point 5a and the second antenna connection point 5b connected and in the vertical Line of symmetry 8 led to the conductive base 1, in the vicinity of a line connection point 25 is designed.
  • the Two-wire line 24 to be replaced by a shielded two-wire line 23 the Shield conductor is connected to the conductive base 1.
  • the shielded two-wire line 23 in a simple manner two coaxial lines 22 run in parallel, as shown in Fig. 4d, their shields are connected to the conductive base 1.
  • the Voltages ⁇ Us and ⁇ Uu as described above, with the arrangements of Figures 4b, 4c and 4d can be coupled out separately.
  • the ring structure 2 is configured essentially rectangular.
  • Realized antenna shapes with a section 16 of approximately 1 ⁇ 4 ⁇ , a transverse dimension 15 of approximately 1/3 ⁇ and one Overall height 14 of about 1/6 ⁇ are sufficiently small for the required directional diagrams Result in losses.
  • a realized antenna according to the invention for frequencies around 2.3 GHz e.g. only a construction height 14 of 2 cm with a transverse dimension 15 of 4.5 cm. at Smaller heights can be chosen by choosing an appropriate capacitance value for the impedance 7 meet the requirements for the directional diagram, but it is increasing To count losses. The losses occurring in the downstream matching network 17 thus increase with a smaller antenna height.
  • An essential advantageous embodiment of the invention consists in the combination of several 5 to a satellite communication antenna for circular polarization.
  • two antennas are used for this purpose
  • Levels 0 are perpendicular to one another, combined, each antenna as in FIGS. 6a and 6.
  • 6c has a resymmetry network 9 and a matching circuit 17.
  • the voltage for circular polarization Uz using a phase shifter 18 and a summation circuit 19 are formed.
  • the latter are in Fig. 6c with the help a parallel connection of lines whose length differs by ⁇ / 4.
  • the Matching circuit 17 can advantageously be shown by printed dummy elements as shown in Fig. 6b will be realized.
  • the lines for resymmetrization are the lines 10a, b, the network as adaptation as series or stub lines 17 and for interconnection and 90 degree phase rotation executed as line 18 each printed.
  • FIG. 11 a suitable elevation diagram is shown in FIG. 11 of the character of the diagrams D2 and D3 for the individual antenna according to FIG. 5.
  • FIG. 6c results in what is required for circular polarization
  • Fig. 12b spatial Diagram
  • the conductive base is skewed, e.g. with a curved vehicle roof in Edge area of a window can be the asymmetry of the conductive base 1 and the Inclination compensated for by different capacitance values in the individual antenna branches become. This corresponds to squinting the diagram.
  • Antenna-adjustable squinting diagram with a squint angle of approx. 15 degrees opposite FIG. 13 shows the zenith angle by way of example.
  • N antennas can be rotationally symmetrical at an angular distance of 360 / N degrees to a vertical line of symmetry 8 be arranged as in FIG. Accordingly, phase shifters 18 with a respective one Phase rotation angle of 360 / N degrees provided, the output signals in the summation circuit 19 are merged and are available at collection point 11.
  • the roundness of the azimuthal directional diagram can continue by choosing sufficiently large values of N. be improved.
  • the rotational symmetry of such an arrangement means that the vertical conductor 4a ', as in Fig. 8, too.
  • the satellite communication antenna is expanded to a combination antenna for which the additional terrestrial communication with vertical polarization is extended to a frequency that deviates from the satellite frequency.
  • This is very advantageously accompanied by a saving in installation space in motor vehicles.
  • a symmetrical antenna designed from two antennas in accordance with the basic form of this invention as in FIG. 9 a, along the symmetry line 8 there is a vertical antenna conductor 20 which is connected at one end to a horizontal part of the ring structure 2 and between its lower end and the conductive base area 1 a connection gate Tu is formed to form an asymmetrical voltage Uu.
  • the conductor parts with horizontal extension 4b act as roof capacitance for the vertical antenna conductor 20.
  • the symmetrical voltages are tapped from the ring structure 2 at the corresponding gates T1a and T1b.
  • the matching network 29 in FIG. 9b serves for frequency-selective adaptation of the impedance present at the connection gate Tu for the frequency of the terrestrial radio service to the characteristic impedance of conventional coaxial lines.
  • the voltage Uu proportional to Uu is present at the output of this matching network 29.
  • the adaptation network 29 is advantageously so to design that the connection gate Tu at the satellite radio frequency with a reactance or is particularly advantageously loaded with a short circuit or idling.
  • the symmetry of the Arrangement can be advantageous for decoupling the connection gates Tu from the connection gates T1a, T1b are used when they are connected to the unbalance network 9. This is to protect the satellite radio service particularly important when the terrestrial Communication is bidirectional. If there is residual asymmetry, it is Improving the decoupling of the satellite radio service advantageous, the unbalance network 9 to be designed such that the connection gates T1a and T1b at the frequency of terrestrial radio service with a short circuit.
  • Fig. 10a the complete satellite communication antenna for circular polarization is with the vertical antenna conductor 20 shown.
  • the connection gates T2a and T2b the 90 Degrees relative to the antenna with the gates T1a, T1b rotated accordingly the antenna in Fig. 6c a resymmetry network 9 with subsequent matching circuit 17 as shown in Fig. 10b connected.
  • the loading of the gates T2a and T2b at Frequency of the terrestrial communication service to protect the satellite radio service the above statements apply.
  • the conductor parts are essential horizontal extension 4b to form a roof capacity 31 with a curved Surface designed in the form of a semi-ellipsoid and the edge in a surface 30 is guided, which in one of its dimensions substantially perpendicular to the plane 0 and is thus oriented essentially parallel to level 1.
  • a suitable choice of size and shape as the roof capacity 31 effective curved surface in conjunction with the appropriate dimensioning of the Impedances 7 can be both the vertical diagram and the one at the base of the Conductor parts with substantial vertical extension 4a existing base impedances set as desired.
  • the ladder parts can be horizontal Extension 4b to form the roof capacity 31 from wire or strip-shaped conductors 32 may be formed, as indicated in FIG. 14b, and may also be designed as lattice structures.
  • a roof capacity 31 that is formed in a particularly simple manner these are arranged completely in the surface 30 as a plane parallel to the conductive base surface 1 (Fig. 15a) and preferably formed in printed circuit technology, as in the figures 15a and 15b.
  • Another embodiment of the invention in printed technology shows Fig. 16.
  • the Conductor parts with a substantial horizontal extent 4b and several impedances 7,7 'in this way formed that with respect to level 0, in which the conductor parts with substantial vertical Extension 4a are also performed with regard to the impedance values of the impedances 7,7 ' symmetrical arrangement is given.
  • the symmetry of the arrangement should also refer to one oriented perpendicular to both the base area 0 and the base plane 1 Plane of symmetry 33 be given.
  • Such arrangements are in Figures 17a, 17b and 17c shown. To explain the operation of an antenna according to the invention, as in 17c, the ring structure 2 in FIG. 17a should first be considered.
  • a such a ring structure contains the capacities 7,7 ' vertical line of symmetry symmetrical capacities of the frame thus formed is also electrically symmetrical. Capacities between ladder parts with essential horizontal extension 4b and the surrounding space do not disturb this symmetry. Consequently 17a represents an antenna which according to the main claim of Invention is designed and also has the property of symmetry. For better The mode of operation of this arrangement is indicated at level 0, in which also Conductor parts are introduced with a substantial vertical extent 4a and the Plane of symmetry 33 shaded.
  • the current arrows for currents I1 and I2 shown in FIG. 18a indicate the principle Current flow of the two frames 2.
  • the current arrows show how this works Impedance network consisting of impedances 7 jointly effective for both frame parts and in which of the impedances 7 the currents I1 and I2 are uniform and in which they are superimposed in opposite directions.
  • 18a shows an example of a connection of the four gates T1a, T1b, T2a, T2b specified, which allows an antenna according to the described Invention to design for circularly polarized radiation.
  • the following are in the Figures 18b, 19 and 20 exemplary embodiments for an antenna of this type listed.
  • the two frames are in the vicinity of the vertical Line of symmetry 8 via a conductive central structure 37 via preferably printed coupling capacitors coupled.
  • the correspondingly designed roof capacities 31 with their coupling capacities 34 to each other and such capacities to form a ring-shaped central structure 37 allow the dimensioning of the antenna with respect to a desired one Directivity pattern.
  • the conductive central structure 37 of the antenna in Fig. 19 allows ring-shaped Training the introduction of a vertical antenna conductor 20 which is used to form a desired impedance at the connection gate Tu with a simple design Radiator coupling capacitance 38 is suitably coupled to the annular central structure 37.
  • FIG Roof capacitors 31 which are on a dielectric body in the form of a Pyramid stumps are suitably designed, attached, so that over the coupling and Capacities sets the appropriate directional diagram.
  • the antenna is for the coordinated and simultaneous reception of circularly polarized satellite radio signals and from in a radio frequency band of terrestrial that is closely adjacent in frequency Vertically polarized radio signals emitted by radio stations.
  • a frequency selective decoupling of the terrestrial radio service from Satellite radio service not possible due to the small frequency spacing.
  • the symmetrical Embodiment of the antennas described above has a perfect Decoupling between the vertical antenna conductor 20 and the output for reception the circular polarization To.
  • the system is not on a narrow band Frequency selection between the two radio services and it can terrestrial broadcast signal and the satellite broadcast signal independently received from each other. Mutual dampening through the withdrawal of power this does not apply to the other gate.
  • an antenna for the additionally combined bidirectional radio operation with vertically polarized terrestrial Radio stations shown.
  • the vertical antenna conductor 20 is additionally for at least bidirectional radio operation with vertically polarized terrestrial radio stations used.
  • the radiator length 43 of the vertical antenna conductor 20 for radio service with the The lowest frequency is advantageously chosen to be sufficiently large.
  • a required frequency-selective shortening of the electrically effective radiator length 43 for higher radio channel frequencies as indicated in FIGS. 21a and 21b, on advantageous way in the longitudinal train of the vertical antenna conductor 20 breakpoints with suitable blind elements 41 for designing the vertical diagram and the Base impedance inserted for this frequency.
  • 21a shows the block diagram of such a combination antenna.
  • matching networks 29a, 29b, 29c with outputs 40a, 40b, 40c for connection of the corresponding radio equipment.
  • the inputs of the matching networks 29a, 29b, 29c each via a frequency-selective isolating circuit 39a, 39b, or 39c to the common connection gate Tu switched on; that the adjustment ratios on Connection gate Tu in the radio frequency channels of the different radio services mutually so are influenced as little as possible.
  • connection gate Tu of the vertical antenna conductor 20 and the connection gates T1a, T1b, T2a, T2b Ring structures 2 are advantageous in the vicinity of the base points of the conductor parts vertical extension 4a each decoupling networks 42 used. These are like this carried out for signals on the frequency of a bidirectional radio operation with vertical polarized radio stations block the frequency of the circularly polarized However, satellite radio signals are permeable. This has the advantageous effect that the impedances present at the gates T1a and T1b via the resymmetry network 9 neither via their active component radiation attenuation on the frequency of a bidirectional radio service still have undesirable reactances on such Frequency cause a disturbing effect.

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  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Waveguide Aerials (AREA)
  • Details Of Aerials (AREA)
EP02002836A 2001-02-23 2002-02-08 Antenne plate pour communication mobile via satellites Expired - Lifetime EP1239543B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10108910 2001-02-23
DE10108910 2001-02-23
DE10163793A DE10163793A1 (de) 2001-02-23 2001-12-22 Flachantenne für die mobile Satellitenkommunikation
DE10163793 2001-12-22

Publications (2)

Publication Number Publication Date
EP1239543A1 true EP1239543A1 (fr) 2002-09-11
EP1239543B1 EP1239543B1 (fr) 2006-08-09

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP02002836A Expired - Lifetime EP1239543B1 (fr) 2001-02-23 2002-02-08 Antenne plate pour communication mobile via satellites

Country Status (8)

Country Link
US (1) US6653982B2 (fr)
EP (1) EP1239543B1 (fr)
KR (1) KR100658016B1 (fr)
AT (1) ATE336090T1 (fr)
BR (1) BRPI0200518B1 (fr)
CA (1) CA2372625C (fr)
DE (2) DE10163793A1 (fr)
MX (1) MXPA02001913A (fr)

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EP1445832A2 (fr) * 2003-02-06 2004-08-11 FUBA Automotive GmbH & Co. KG Combination d'antennes pour multiples radio services pour vehicules
EP1947736A1 (fr) * 2005-11-08 2008-07-23 Matsushita Electric Industrial Co., Ltd. Antenne composite et terminal portable l utilisant
EP2226895A3 (fr) * 2009-03-03 2010-12-15 Delphi Delco Electronics Europe GmbH Antenne pour la réception circulaire dans un sens de rotation de la polarisation de signaux radio par satellite rayonnés

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DE102022000191A1 (de) 2022-01-19 2023-07-20 Heinz Lindenmeier Antennenmodul für einen Empfänger zum mobilen Empfang von Ortungssatelliten- Signalen
CN114447600A (zh) * 2022-01-25 2022-05-06 蓬托森思股份有限公司 一种天线单元

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US3427624A (en) * 1966-07-13 1969-02-11 Northrop Corp Low profile antenna having horizontal tunable top loading member
DE4008505A1 (de) * 1990-03-16 1991-09-19 Lindenmeier Heinz Antenne fuer die mobile satellitenkommunikation
US5173715A (en) * 1989-12-04 1992-12-22 Trimble Navigation Antenna with curved dipole elements
US5784032A (en) * 1995-11-01 1998-07-21 Telecommunications Research Laboratories Compact diversity antenna with weak back near fields
WO2000024085A1 (fr) * 1998-10-16 2000-04-27 Ems Technologies Canada, Ltd. Antenne doublet croisee repliee
US6181298B1 (en) * 1999-08-19 2001-01-30 Ems Technologies Canada, Ltd. Top-fed quadrafilar helical antenna

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JPH0286201A (ja) * 1988-09-21 1990-03-27 Harada Ind Co Ltd 自動車用ループアンテナ
JPH05327335A (ja) * 1992-05-15 1993-12-10 Matsushita Electric Works Ltd ループアンテナ
US5457470A (en) * 1993-07-30 1995-10-10 Harada Kogyo Kabushiki Kaisha M-type antenna for vehicles
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US5654724A (en) * 1995-08-07 1997-08-05 Datron/Transco Inc. Antenna providing hemispherical omnidirectional coverage
US5629712A (en) * 1995-10-06 1997-05-13 Ford Motor Company Vehicular slot antenna concealed in exterior trim accessory
US6014107A (en) * 1997-11-25 2000-01-11 The United States Of America As Represented By The Secretary Of The Navy Dual orthogonal near vertical incidence skywave antenna
DE19817573A1 (de) 1998-04-20 1999-10-21 Heinz Lindenmeier Antenne für mehrere Funkdienste
JP4108275B2 (ja) * 1999-05-07 2008-06-25 古野電気株式会社 円偏波アンテナ
US6480158B2 (en) * 2000-05-31 2002-11-12 Bae Systems Information And Electronic Systems Integration Inc. Narrow-band, crossed-element, offset-tuned dual band, dual mode meander line loaded antenna

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Publication number Priority date Publication date Assignee Title
US2994876A (en) * 1957-01-14 1961-08-01 Bengt Adolf Samuel Josephson Ultrashortwave antenna
US3427624A (en) * 1966-07-13 1969-02-11 Northrop Corp Low profile antenna having horizontal tunable top loading member
US5173715A (en) * 1989-12-04 1992-12-22 Trimble Navigation Antenna with curved dipole elements
DE4008505A1 (de) * 1990-03-16 1991-09-19 Lindenmeier Heinz Antenne fuer die mobile satellitenkommunikation
US5784032A (en) * 1995-11-01 1998-07-21 Telecommunications Research Laboratories Compact diversity antenna with weak back near fields
WO2000024085A1 (fr) * 1998-10-16 2000-04-27 Ems Technologies Canada, Ltd. Antenne doublet croisee repliee
US6181298B1 (en) * 1999-08-19 2001-01-30 Ems Technologies Canada, Ltd. Top-fed quadrafilar helical antenna

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1445832A2 (fr) * 2003-02-06 2004-08-11 FUBA Automotive GmbH & Co. KG Combination d'antennes pour multiples radio services pour vehicules
EP1445832A3 (fr) * 2003-02-06 2007-05-23 FUBA Automotive GmbH & Co. KG Combination d'antennes pour multiples radio services pour vehicules
EP1947736A1 (fr) * 2005-11-08 2008-07-23 Matsushita Electric Industrial Co., Ltd. Antenne composite et terminal portable l utilisant
EP1947736A4 (fr) * 2005-11-08 2012-12-05 Panasonic Corp Antenne composite et terminal portable l utilisant
EP2226895A3 (fr) * 2009-03-03 2010-12-15 Delphi Delco Electronics Europe GmbH Antenne pour la réception circulaire dans un sens de rotation de la polarisation de signaux radio par satellite rayonnés
US8537063B2 (en) 2009-03-03 2013-09-17 Delphi Delco Electronics Europe Gmbh Antenna for reception of satellite radio signals emitted circularly, in a direction of rotation of the polarization

Also Published As

Publication number Publication date
ATE336090T1 (de) 2006-09-15
CA2372625C (fr) 2003-11-18
DE10163793A1 (de) 2002-09-05
BR0200518A (pt) 2002-10-01
CA2372625A1 (fr) 2002-08-23
DE50207754D1 (de) 2006-09-21
EP1239543B1 (fr) 2006-08-09
US20020118138A1 (en) 2002-08-29
US6653982B2 (en) 2003-11-25
KR20020069178A (ko) 2002-08-29
BRPI0200518B1 (pt) 2016-05-24
MXPA02001913A (es) 2004-04-21
KR100658016B1 (ko) 2006-12-15

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