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WO1997032355A1 - Dispositif d'antenne pour vehicules - Google Patents

Dispositif d'antenne pour vehicules Download PDF

Info

Publication number
WO1997032355A1
WO1997032355A1 PCT/JP1997/000505 JP9700505W WO9732355A1 WO 1997032355 A1 WO1997032355 A1 WO 1997032355A1 JP 9700505 W JP9700505 W JP 9700505W WO 9732355 A1 WO9732355 A1 WO 9732355A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
antenna element
vehicle
mirror
door mirror
Prior art date
Application number
PCT/JP1997/000505
Other languages
English (en)
Japanese (ja)
Inventor
Koichi Mitarai
Original Assignee
Toyota Jidosha Kabushiki Kaisha
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 Toyota Jidosha Kabushiki Kaisha filed Critical Toyota Jidosha Kabushiki Kaisha
Publication of WO1997032355A1 publication Critical patent/WO1997032355A1/fr
Priority to US09/141,262 priority Critical patent/US6078294A/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
    • B60R1/12—Mirror assemblies combined with other articles, e.g. clocks
    • 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
    • H01Q1/3266—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle using the mirror of the vehicle
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
    • B60R1/12—Mirror assemblies combined with other articles, e.g. clocks
    • B60R2001/1261—Mirror assemblies combined with other articles, e.g. clocks with antennae

Definitions

  • the present invention relates to a vehicular antenna device in which an antenna element is built in a door mirror of a vehicle.
  • Japanese Patent Application Laid-Open No. 63-170349 proposes an antenna in which an antenna is arranged inside a luma mirror or a side mirror.
  • an antenna is arranged inside a door mirror, its size must be considerably small.
  • the tenor is not a linear shape but a band shape.
  • door mirrors are usually retractable, and it is considered difficult to maintain the shape of the antenna when it is stored as a strip.
  • the GPS antenna it is relatively easy to miniaturize the antenna element itself, and it is considered that the antenna element can be physically (dimensionally) housed in the door mirror.
  • the antenna element if the antenna element is miniaturized, there is a high possibility that the receiving performance will be significantly degraded depending on the installation conditions (surrounding environment), and the production yield is expected to deteriorate. Therefore, no proposal has been made so far to house the GPS antenna in the door mirror. Also, the GPS antenna needs to be hardly affected by reflected waves from the road surface or the like.
  • the present invention has been made in view of the above problems, and has as its object to provide an antenna device suitable for being incorporated in a door mirror.
  • the antenna element is arranged on the periphery of the door mirror case. Therefore, an antenna element long enough to receive TV broadcast waves can be obtained.
  • the antenna element includes a band-shaped first antenna element and a linear second antenna element that is connected in series to the first antenna element. Further, the belt surface of the first antenna element is fixed to an inner surface of a door mirror case, and the second antenna element is arranged on a vehicle side of a door mirror.
  • the TV broadcast wave is received by the first antenna element.
  • the first antenna element is band-shaped, and can suitably receive wideband TV radio waves. Also, if the first antenna element is made shorter than the center frequency of the received radio wave, the first antenna element will show capacitive but the second antenna element will show inductance and cancel out the reactance of both. Thus, a suitable antenna can be obtained.
  • the mirror functions as a parasitic antenna element, and wideband reception can be performed effectively.
  • the second antenna is arranged on the vehicle mounting side, connection with the vehicle side is facilitated even if there is a rotary storage mechanism of Domira.
  • the antenna element in a device in which an antenna element is installed in a door mirror case of a vehicle, the antenna element is a GPS antenna, and the GPS antenna The antenna is placed upwards behind one side of Mira.
  • the visibility to the satellite is relatively good, and the radio wave from the satellite can be effectively received.
  • GPS antenna is located behind the mirror, reflected waves from buildings and road surfaces are less likely to enter, minimizing erroneous detection and enabling accurate position detection.
  • the vehicle further comprises a conductive actuator for changing an angle of the mirror
  • the GPS antenna is on a front side of the mirror on the vehicle side, and is located inside the conductive actuator in a vehicle width direction. Or it is arranged on the upper side. With this arrangement, it is possible to prevent the reflected wave from being received even by the conductive actuator.
  • the antenna can be downsized. Furthermore, by using two-point power supply, the axial ratio can be greatly improved.
  • FIG. 1 is a diagram showing a configuration of a first embodiment.
  • FIG. 2 is a diagram showing a cross-sectional configuration of a second embodiment.
  • FIG. 3 is a diagram showing a front configuration of the same embodiment with a mirror removed.
  • FIG. 4 is a diagram showing a configuration of the antenna element of the embodiment.
  • FIG. 5 is a view showing an axial ratio characteristic of the antenna element of the embodiment.
  • FIG. 6 is a diagram showing a configuration of a GPS antenna assembly of the embodiment.
  • FIG. 7 is a circuit diagram showing a configuration of a preamplifier of the same embodiment.
  • FIG. 8 is a diagram showing an arrangement of a preamplifier of the embodiment.
  • FIG. 9 is a diagram showing a form of wire bonding of the bare chip of the embodiment.
  • FIG. 1 is a diagram showing a configuration of a vehicle antenna device according to the first embodiment.
  • An antenna element (TV antenna element 2) is housed inside a door mirror case 1.
  • the TV antenna element 2 is connected to a coaxial cable 3 for power supply, receives power from this, and receives TV radio waves.
  • the TV antenna element 2 is composed of a strip-shaped first antenna element 4 and a second antenna element 5 composed of a linear conductor, and one end of the second antenna element 5 has a coaxial cable 3. The other end is connected to one end of the first antenna element 4. The other end of the first antenna element 4 is an open end.
  • the outer conductor of the coaxial cable 3 is electrically connected to the vehicle body and is grounded. For example, grounding may be provided near the door mirror to which the door mirror is attached, and only the inner conductor may be introduced into the door mirror case 1. In contrast, the vehicle body may be grounded via a rotatable metal shaft or the like.
  • the mirror 6 is provided in front of the door mirror case 1.
  • the first antenna element 4 is made of a strip-shaped conductor, for example, a conductive tape of copper foil, and has a width of 20 to 30 mm and a length of 200 to 300 mm.
  • the second antenna element 5 is a copper wire having a diameter of about 1 mm and a length of about 5 O mm.
  • the first and second antenna elements 4 and 5 are attached to one side of the door mirror case 1. That is, the first antenna element 4 is mounted on the upper side and right side (the side farther from the vehicle body) of the door mirror case 1, and the second antenna element 5 is mounted on the left side of the door mirror case 1 (closer to the vehicle body). Side).
  • the Domira 1 case 1 is formed of a plastic material.
  • the TV broadcast wave is received by such a TV antenna element 2, and the TV broadcast wave is first received by the first antenna element 4.
  • the first antenna element 4 has a band shape and has many current paths. For this reason, it is possible to receive broadband radio waves necessary for receiving TV broadcast waves.
  • the first antenna element 4 is shorter than the length required for receiving radio waves in the TV band. Therefore, the impedance of the first antenna element 4 , Will indicate capacitive.
  • a linear second antenna element 5 is connected to the first antenna element 4. Since the second antenna element 5 has a linear shape, its impedance indicates inductance.
  • the TV antenna element 2 of the present embodiment is configured by connecting the capacitive first antenna element 4 and the inductance second antenna element 5. Therefore, by adjusting the capacitive and inductive reactances of both, the impedance of the two can be made to have the mutual reactance offset. Thus, the matching condition can be satisfied, and good reception power can be supplied to the TV receiver connected to the other end of the coaxial cable 3.
  • the loop formed by the TV antenna element 2 surrounds the mirror 6.
  • the reflection film of the mirror 6 is formed of a conductor (for example, an aluminum deposition film). Therefore, a parasitic element is loaded on the TV antenna element 2. Therefore, the frequency characteristics of the TV antenna element 2 can be further widened using this mirror. Therefore, the requirements for the accuracy of the TV antenna element 2 are not strict, the production yield is improved, and the cost is reduced.
  • the second antenna element 5 Since the second antenna element 5 has a linear shape, it is easy to route a cable (wire harness) from the inside of the door mirror case 1 to the vehicle side, and an effect of improving assembly workability can be obtained.
  • the second antenna element 5 is extended to the outside of the door mirror case 1, but the coaxial cable 3 is guided to the inside of the door mirror case 1 and is attached to the rotating shaft of the door mirror case 1.
  • the outer conductor of the coaxial cable 3 may be grounded to a metal part (electrically conductive with the vehicle body) provided. Further, the second antenna element 5 may be arranged in a meandering manner.
  • FIG. 2 shows a vehicle antenna device according to a second embodiment.
  • the TV antenna element 2 has been described, but in the second embodiment, the GPS antenna assembly 7 is provided. That is, as shown in Fig. 2, A mirror 6 is provided on the front side inside the case 1, and a GPS antenna assembly 7 is arranged behind the mirror 6. The mirror 6 is held by a mirror electric actuator 8, and the direction of the mirror 6 is changed to front, rear, left and right by the mirror electric actuator 8.
  • one point on the back of the mirror 16 is pivotally supported by the electric actuator 8 for the mirror 8 as a reference point 8a, and is freely movable to the side of the reference point 8a.
  • a left-right drive shaft 8b and a front-rear movable front-rear drive shaft 8c are provided above (or below). Accordingly, the mirror 6 rotates in the horizontal plane by moving the left and right drive shaft 8b forward and backward, and the mirror 6 rotates in the elevation direction by moving the front and rear drive shaft 8c forward and backward.
  • a GPS antenna assembly 7 is arranged on the rear of the electric actuator 8 for mirror on the vehicle body side.
  • FIG. 4 shows the antenna elements housed in the GPS antenna assembly 7.
  • FIG. 10 is a diagram showing a configuration of 10.
  • the present antenna element 10 is configured by a microstrip antenna in which a square, thin-film antenna patch 12 smaller than the dielectric substrate is formed on the surface of the square dielectric substrate 11.
  • one side of the dielectric substrate 11 is 25 mm
  • the thickness is 4 mm
  • a dielectric substrate having a dielectric constant of about 21 is employed.
  • the dielectric constant is about 20 to 40.
  • the antenna patch 12 is made of a printed and fired copper film having a side (L) of about 20 mm.
  • the power supply to the antenna patch 12 is two-point power supply. That is, as shown in FIG. 4, feed points ⁇ 1 and f ⁇ 2 are provided at positions that are different from each other by 90 ° when viewed from the center of the antenna patch 12 and are separated by a predetermined distance. This allows the antenna element to be reliably excited with circularly polarized waves. In other words, in the case of single-point feeding, excitation with a predetermined circular polarization is achieved by providing cuts and projections around the antenna patch 12. Therefore, the axial ratio of circularly polarized waves greatly changes depending on the frequency.
  • excitation is performed with circularly polarized waves in accordance with the phase of the current fed to the two points, so that a suitable axial ratio can be secured in a wide band.
  • the distance from the center of each feeding point fp 1 and f P 2 and the size of the antenna patch 12 By adjusting (LXL), desired characteristics can be obtained.
  • Figure 5 shows the relationship between the axial ratio and frequency for one-point power supply and two-point power supply.
  • a very good axial ratio is obtained at the center frequency, but the axial ratio becomes extremely poor when the frequency departs from the center frequency.
  • two-point power supply it is understood that a good axial ratio can be obtained stably over a wide area, and that excitation can be performed in a wide range and with favorable circular polarization.
  • the axial ratio must be reduced (good) over the entire reception (resonance) band (frequency range where the standing wave ratio (SWR) is 2 or less) of the antenna. Is possible.
  • the performance of the antenna can be fully utilized.
  • the band with a good axial ratio is only about 20 to 30% of the antenna resonance band.
  • FIG. 6 shows the overall configuration of the GPS antenna assembly 7.
  • the antenna element 10 is housed in the case 15.
  • the inner conductor 16a of the coaxial cable 16 passes through the dielectric substrate 11 and is connected to the antenna patch 12 on the surface.
  • FIG. 7 is a diagram showing a preamplifier circuit.
  • the antenna element 10 fed from two feeding points having phases different from each other by 90 ° is represented as two antennas: antennas 10Q and 101.
  • the two antennas 10Q and 10I are connected to the hybrid circuit 20 via connectors CNI-I and CN-Q.
  • the hybrid circuit 20 distributes the power supply current to the two antennas 10Q and 101 with a 90 ° phase difference.
  • the hybrid circuit 20 is connected to the amplifier IC 21.
  • This amplifier IC 21 performs the first-stage amplification of the received signal.
  • the amplifier IC 21 is connected to the amplifier IC 24 via a bandpass filter 23.
  • the amplifier IC 24 amplifies a signal of which a predetermined frequency is selected by the band-pass filter 23.
  • the output of the amplifier IC 24 is connected to the inner conductor ⁇ 6 a of the coaxial cable 16 via the capacitor C 6.
  • the outer conductor 16b of the coaxial cable 16 is connected to the ground of the printed circuit board.
  • a DC of about 5 V is superimposed on the inner conductor 16 a of the coaxial cable 16, and the length is 1 of the wavelength of the center frequency, and the relatively narrow characteristic impedance is about 100 ⁇ .
  • DC is extracted through microstrip line 25 and supplied to amplifier ICs 21 and 24 as power.
  • the capacitors C1 to C5 and C7 are for noise removal.
  • the printed circuit board 17 is formed of a resin having a dielectric constant of about 10, and the wiring on the printed circuit board 17 is a microstrip line (characterized as MSL 50) having a characteristic impedance of 50 ⁇ . ).
  • FIG. 8 is an overall layout diagram of a printed circuit board 17 on which a preamplifier is mounted.
  • a connector (for signal output) CNOUT is provided at one end (upper left) to connect with the vehicle body side, the power supply line goes down, and the signal processing line turns right and goes to the center.
  • the signal input terminals C N ⁇ 1 and C N ⁇ Q connected to the hybrid circuit 20 are located just below the feed point f p] and ⁇ p 2. This allows connection to the antenna patch 12 with relatively short pins.
  • the amplifiers IC 21 and 24 are formed of bare chips and connected to the microstrip line by wire bonding.
  • FIG. 9 shows the state of wire bonding of the amplifiers IC 21 and 24.
  • thick lines with a symbol at both ends indicate wire bonding. This makes it possible to reduce the size of the circuit as a whole and obtain sufficient characteristics.
  • the GPS antenna assembly 7 can be reduced in size and stabilized, and can be incorporated in the door mirror case 1.
  • the radio wave from the GPS satellite is received by the antenna patch 12 and supplied to the GPS receiver via the preamplifier and the coaxial cable 16.
  • the GPS antenna assembly 7 is behind the mirror 6 Are located in Therefore, there is a low possibility that the reflection reflected on the building or the road surface is received by the antenna patch 12, so that erroneous detection can be prevented, and the positioning accuracy can be improved.
  • there is an electric mirror for Mira outside the GPS antenna assembly, there is an electric mirror for Mira. Therefore, this also blocks the radio waves and prevents erroneous detection due to reflected waves.
  • the antenna element was placed on the preamplifier substrate 17 and housed in a case, it was only necessary to connect it to the GPS receiver with a coaxial cable. In other words, the antenna is adjusted at the time of manufacture so that a predetermined function can be exhibited. Therefore, at the time of installation, fine adjustment of the antenna element is not required, and the assembling work becomes very simple.
  • this antenna element was used only for GPS reception, but with the same configuration, it is also used for other radio waves, such as reception of radio waves from traffic information and road beacons for toll collection on toll roads can do.
  • a fender mirror or the like may be used as long as it has the same shape as the door mirror.

Landscapes

  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Multimedia (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Aerials (AREA)
  • Rear-View Mirror Devices That Are Mounted On The Exterior Of The Vehicle (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Waveguide Aerials (AREA)
  • Support Of Aerials (AREA)

Abstract

Un élément d'antenne TV (2) est constitué par un premier élément d'antenne en forme de bande (4) et par un second élément d'antenne linéaire (5) et il est coincé en boucle sur la surface interne du boîtier (1) d'un rétroviseur de porte. On obtient des caractéristiques améliorées en combinant la caractéristique de capacitance du premier élément d'antenne (4) et la caractéristique d'inductance du second élément d'antenne (5). Le câblage est facile à réaliser étant donné que l'élément d'antenne est connecté au côté de la carrosserie de la voiture par l'intermédiaire du second élément d'antenne (5). L'unité d'antenne GPS est disposée sur la face arrière du rétroviseur.
PCT/JP1997/000505 1996-03-01 1997-02-24 Dispositif d'antenne pour vehicules WO1997032355A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US09/141,262 US6078294A (en) 1996-03-01 1998-08-27 Antenna device for vehicles

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP8/45086 1996-03-01
JP4508696A JPH09246827A (ja) 1996-03-01 1996-03-01 車両用アンテナ装置

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US09/141,262 Continuation US6078294A (en) 1996-03-01 1998-08-27 Antenna device for vehicles

Publications (1)

Publication Number Publication Date
WO1997032355A1 true WO1997032355A1 (fr) 1997-09-04

Family

ID=12709521

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1997/000505 WO1997032355A1 (fr) 1996-03-01 1997-02-24 Dispositif d'antenne pour vehicules

Country Status (2)

Country Link
JP (1) JPH09246827A (fr)
WO (1) WO1997032355A1 (fr)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0989028A3 (fr) * 1998-09-23 2000-12-20 Britax (Geco) S.A. Rétroviseur extérieur pour véhicule avec antenne
DE10005567A1 (de) * 2000-02-09 2001-08-30 Bosch Gmbh Robert Fahrzeugaußenspiegel mit integrierter Antenne
EP1198025A1 (fr) * 2000-10-10 2002-04-17 FIAT AUTO S.p.A. Dispositif de réception de signaux GPS
US6870507B2 (en) 2001-02-07 2005-03-22 Fractus S.A. Miniature broadband ring-like microstrip patch antenna
US6937191B2 (en) 1999-10-26 2005-08-30 Fractus, S.A. Interlaced multiband antenna arrays
US6937206B2 (en) 2001-04-16 2005-08-30 Fractus, S.A. Dual-band dual-polarized antenna array
US7015868B2 (en) 1999-09-20 2006-03-21 Fractus, S.A. Multilevel Antennae
US7148850B2 (en) 2000-01-19 2006-12-12 Fractus, S.A. Space-filling miniature antennas
US7202818B2 (en) 2001-10-16 2007-04-10 Fractus, S.A. Multifrequency microstrip patch antenna with parasitic coupled elements
US7215287B2 (en) 2001-10-16 2007-05-08 Fractus S.A. Multiband antenna
US7312762B2 (en) 2001-10-16 2007-12-25 Fractus, S.A. Loaded antenna
US7511675B2 (en) 2000-10-26 2009-03-31 Advanced Automotive Antennas, S.L. Antenna system for a motor vehicle
US9099773B2 (en) 2006-07-18 2015-08-04 Fractus, S.A. Multiple-body-configuration multimedia and smartphone multifunction wireless devices
US9755314B2 (en) 2001-10-16 2017-09-05 Fractus S.A. Loaded antenna
WO2020122714A1 (fr) * 2018-12-10 2020-06-18 Daf Trucks N.V. Système de communication sans fil de véhicule à véhicule destiné à être monté sur un véhicule

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4975975B2 (ja) * 2005-03-24 2012-07-11 株式会社東海理化電機製作所 車両用ドアミラー装置
JP4755461B2 (ja) 2005-07-29 2011-08-24 株式会社村上開明堂 アンテナ付きミラー装置
DE112008001263B4 (de) * 2007-05-10 2022-07-07 Advanced Automotive Antennas, S.L. Fahrzeugspiegel-Antennenbaugruppe
JP2016049808A (ja) * 2014-08-28 2016-04-11 株式会社フジクラ アンテナ装置およびアンテナ装置の設置方法
CN107206938B (zh) * 2015-01-20 2020-09-04 金泰克斯公司 具有天线的后视镜组件
JP6439481B2 (ja) * 2015-02-13 2018-12-19 富士通株式会社 アンテナ装置

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JPS60158702A (ja) * 1984-01-30 1985-08-20 Nissan Motor Co Ltd 車両用アンテナ
JPS61107206U (fr) * 1984-12-18 1986-07-08
JPS6239903A (ja) * 1985-08-15 1987-02-20 Nissan Motor Co Ltd 車両用アンテナ装置
JPS6239905A (ja) * 1985-08-15 1987-02-20 Nissan Motor Co Ltd 車両用キ−システムのアンテナ配設構造
JPS6340013U (fr) * 1986-08-30 1988-03-15
JPS63250903A (ja) * 1987-04-07 1988-10-18 Mitsugi Inaba 自動車用アンテナ
JPH05175721A (ja) * 1991-12-24 1993-07-13 Aisin Seiki Co Ltd 多周波数共用マイクロストリップアンテナ
JPH06169217A (ja) * 1992-09-30 1994-06-14 Toshiba Corp 携帯無線装置
JPH06169219A (ja) * 1991-05-27 1994-06-14 Yuseisho Tsushin Sogo Kenkyusho 多点給電円偏波アンテナ
JPH071619A (ja) * 1992-12-08 1995-01-06 Shin Nippon Koa Kk ハニカムコアを用いたパネルの製造方法

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Publication number Priority date Publication date Assignee Title
JPS60158702A (ja) * 1984-01-30 1985-08-20 Nissan Motor Co Ltd 車両用アンテナ
JPS61107206U (fr) * 1984-12-18 1986-07-08
JPS6239903A (ja) * 1985-08-15 1987-02-20 Nissan Motor Co Ltd 車両用アンテナ装置
JPS6239905A (ja) * 1985-08-15 1987-02-20 Nissan Motor Co Ltd 車両用キ−システムのアンテナ配設構造
JPS6340013U (fr) * 1986-08-30 1988-03-15
JPS63250903A (ja) * 1987-04-07 1988-10-18 Mitsugi Inaba 自動車用アンテナ
JPH06169219A (ja) * 1991-05-27 1994-06-14 Yuseisho Tsushin Sogo Kenkyusho 多点給電円偏波アンテナ
JPH05175721A (ja) * 1991-12-24 1993-07-13 Aisin Seiki Co Ltd 多周波数共用マイクロストリップアンテナ
JPH06169217A (ja) * 1992-09-30 1994-06-14 Toshiba Corp 携帯無線装置
JPH071619A (ja) * 1992-12-08 1995-01-06 Shin Nippon Koa Kk ハニカムコアを用いたパネルの製造方法

Cited By (49)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6380902B2 (en) 1998-09-23 2002-04-30 Bernard Duroux Vehicle exterior mirror with antenna
US6259412B1 (en) 1998-09-23 2001-07-10 Bernard Duroux Vehicle exterior mirror with antenna
EP0989028A3 (fr) * 1998-09-23 2000-12-20 Britax (Geco) S.A. Rétroviseur extérieur pour véhicule avec antenne
US7015868B2 (en) 1999-09-20 2006-03-21 Fractus, S.A. Multilevel Antennae
US7528782B2 (en) 1999-09-20 2009-05-05 Fractus, S.A. Multilevel antennae
US7505007B2 (en) 1999-09-20 2009-03-17 Fractus, S.A. Multi-level antennae
US9362617B2 (en) 1999-09-20 2016-06-07 Fractus, S.A. Multilevel antennae
US9240632B2 (en) 1999-09-20 2016-01-19 Fractus, S.A. Multilevel antennae
US9761934B2 (en) 1999-09-20 2017-09-12 Fractus, S.A. Multilevel antennae
US9054421B2 (en) 1999-09-20 2015-06-09 Fractus, S.A. Multilevel antennae
US7394432B2 (en) 1999-09-20 2008-07-01 Fractus, S.A. Multilevel antenna
US7123208B2 (en) 1999-09-20 2006-10-17 Fractus, S.A. Multilevel antennae
US10056682B2 (en) 1999-09-20 2018-08-21 Fractus, S.A. Multilevel antennae
US9000985B2 (en) 1999-09-20 2015-04-07 Fractus, S.A. Multilevel antennae
US8976069B2 (en) 1999-09-20 2015-03-10 Fractus, S.A. Multilevel antennae
US8941541B2 (en) 1999-09-20 2015-01-27 Fractus, S.A. Multilevel antennae
US7397431B2 (en) 1999-09-20 2008-07-08 Fractus, S.A. Multilevel antennae
US6937191B2 (en) 1999-10-26 2005-08-30 Fractus, S.A. Interlaced multiband antenna arrays
US8896493B2 (en) 1999-10-26 2014-11-25 Fractus, S.A. Interlaced multiband antenna arrays
US7250918B2 (en) 1999-10-26 2007-07-31 Fractus, S.A. Interlaced multiband antenna arrays
US7557768B2 (en) 1999-10-26 2009-07-07 Fractus, S.A. Interlaced multiband antenna arrays
US9905940B2 (en) 1999-10-26 2018-02-27 Fractus, S.A. Interlaced multiband antenna arrays
US7148850B2 (en) 2000-01-19 2006-12-12 Fractus, S.A. Space-filling miniature antennas
US10355346B2 (en) 2000-01-19 2019-07-16 Fractus, S.A. Space-filling miniature antennas
US7554490B2 (en) 2000-01-19 2009-06-30 Fractus, S.A. Space-filling miniature antennas
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