CN102396106B - Vehicle glass antenna, vehicle window glass, and vehicle glass antenna feeding structure - Google Patents

Vehicle glass antenna, vehicle window glass, and vehicle glass antenna feeding structure Download PDF

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Publication number
CN102396106B
CN102396106B CN201080016848.3A CN201080016848A CN102396106B CN 102396106 B CN102396106 B CN 102396106B CN 201080016848 A CN201080016848 A CN 201080016848A CN 102396106 B CN102396106 B CN 102396106B
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CN
China
Prior art keywords
antenna
conductor
glass
grounding parts
passive
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CN201080016848.3A
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CN102396106A (en
Inventor
下宪一郎
渡边充朗
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AGC Inc
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Asahi Glass Co Ltd
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/12Supports; Mounting means
    • H01Q1/1271Supports; Mounting means for mounting on windscreens

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  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)

Abstract

A vehicle glass antenna in which an earth portion is a region for electrically connecting a non-feeding conductor to a vehicle body and a feeding portion and the earth portion are disposed side by side along a reference direction. An antenna conductor comprises: a first element having a starting point at the feeding portion and extending in a first direction that is a direction parallel with the reference direction and pointing toward the opposite side of the earth portion; a second element connected to a first terminal portion that is an end of the first element on the opposite side from the feeding portion and extending in a second direction that is a direction orthogonal to the first element and pointing toward the inner side with respect to the outer circumference of a window glass; and a third element having a starting point at the second element and extending in a third direction that is the opposite direction to the first direction. The non-feeding conductor includes non-feeding element that is an element, at least a part of which extends in the second direction with a starting point at the earth portion.

Description

The electric power-feeding structure of Vehicular glass antenna and window glass for vehicle and Vehicular glass antenna
Technical field
The present invention relates to and antenna conductor and passive conductor are arranged at the Vehicular glass antenna of glass pane and the electric power-feeding structure of window glass for vehicle and Vehicular glass antenna.
Background technology
Conventionally, there is known the surface of the glass pane at motor vehicle such described in Japanese Laid-Open 2007-110390 publication is arranged and the glass antenna of the electric wave of transmission and reception high frequency band.Glass antenna described in Japanese Laid-Open 2007-110390 publication possesses the passive line of configuration near antenna.
Summary of the invention
But, in glass antenna in the past, due to be arranged in front glass and rear glass at least either party, and on vehicle fore-and-aft direction, show excellent receiving sensitivity, but about the side of vehicle, but cannot obtain sufficient antenna gain.On the other hand, with visibility of aesthetic appearance, occupant etc. for reason, and the miniaturization of antenna is pursued.
Therefore, the object of the present invention is to provide a kind of miniaturization that can realize the glass antenna of the reception of the electric wave of the high frequency band being suitable for received terrestrial digital broadcasting etc., and the Vehicular glass antenna of the receiving sensitivity of vehicle side and the electric power-feeding structure of window glass for vehicle and Vehicular glass antenna can be improved.
To achieve these goals, the invention provides a kind of Vehicular glass antenna, antenna conductor is provided with in glass pane, the power supply be connected with this antenna conductor, passive conductor, and the grounding parts to be connected with this passive conductor, it is characterized in that, when described glass pane is equipped on vehicle, described power supply is the position for being electrically connected with the signal processing circuit being equipped on vehicle by described antenna conductor, described grounding parts is the position for being electrically connected with vehicle body by described passive conductor, described power supply and described grounding parts are arranged along reference direction, described antenna conductor possesses: with described power supply for starting point is along the first element that is parallel with described reference direction and that extend towards direction and the first direction of the opposition side of described grounding parts, with being connected with the terminal of described power supply opposite side and first terminal portion of described first element, and along the second element that is orthogonal with described first element and that extend towards direction and the second direction of inner side relative to the periphery of described glass pane, and with the third element that described second element extends along direction opposite to the first direction and third direction for starting point, described passive conductor possesses passive component, and this passive component is at least partially with the element that described grounding parts extends along described second direction for starting point.
In addition, preferably, described antenna conductor possesses the fourth element extended along described first direction for starting point with described second element.
In addition, preferably, described passive conductor possesses attached passive component that is parallel with described reference direction and that be connected with described passive component.
In addition, to achieve these goals, the invention provides a kind of window glass for vehicle, it is provided with Vehicular glass antenna of the present invention.
In addition, to achieve these goals, the invention provides a kind of electric power-feeding structure of Vehicular glass antenna, possess: window glass for vehicle of the present invention; By the first electroconductive member that described power supply is electrically connected with described signal processing circuit; And the second electroconductive member that described grounding parts is electrically connected with vehicle body.
[invention effect]
According to the present invention, the miniaturization of the glass antenna of the reception of the electric wave of the high frequency band being suitable for received terrestrial digital broadcasting etc. can be realized, and the receiving sensitivity of vehicle side can be improved.
Accompanying drawing explanation
Fig. 1 is the vertical view of Vehicular glass antenna 100.
Fig. 2 is the vertical view of Vehicular glass antenna 200.
Fig. 3 is the vertical view of Vehicular glass antenna 300.
Fig. 4 is the vertical view of Vehicular glass antenna 400.
Fig. 5 is the vertical view of Vehicular glass antenna 500.
Fig. 6 is the vertical view of Vehicular glass antenna 600.
Fig. 7 is the vertical view of Vehicular glass antenna 700.
Fig. 8 is the vertical view of Vehicular glass antenna 800.
Fig. 9 is the vertical view of Vehicular glass antenna 900.
Figure 10 A is the cutaway view of the electric power-feeding structure representing power supply.
Figure 10 B is the cutaway view of the electric power-feeding structure representing grounding parts.
Figure 11 A is the schematic diagram of the electric power-feeding structure of the Vehicular glass antenna 100 of embodiments of the present invention.
Figure 11 B is the schematic diagram of the electric power-feeding structure of Vehicular glass antenna X in the past.
Figure 12 is the frequency characteristic figure of the antenna gain of glass antenna 100 and glass antenna X.
Figure 13 is the directivity graph of the directive property of glass antenna 100 and glass antenna X.
Figure 14 is the measured data of antenna gain when conductor length x4 is changed.
Figure 15 is the measured data of antenna gain when terminal part 3g and terminal part 6g overlap distance xs1 is in the horizontal direction changed.
Figure 16 is the frequency characteristic figure of the antenna gain of glass antenna 100 ~ 600.
Figure 17 be glass antenna 100A, 100B, 700 ~ 900 the frequency characteristic figure of antenna gain.
Figure 18 is the cutaway view of the form different from Figure 10 B of the electric power-feeding structure representing grounding parts.
Figure 19 is the stereogram of the elastic connection element 31 as the second electroconductive member.
Figure 20 is the cutaway view of the form different from Figure 10 B of the electric power-feeding structure representing grounding parts.
Embodiment
Below, with reference to accompanying drawing, illustrate for implementing mode of the present invention.It should be noted that, in the accompanying drawing for being described mode, as long as when recording especially on direction, just referring to the direction on accompanying drawing.In addition, these accompanying drawings are the figure observed in the car under state glass pane being installed on vehicle, but the figure that also can observe outward as car carries out reference.Such as, when glass pane being installed on the front glass of front part of vehicle, the left and right directions on accompanying drawing is equivalent to overall width direction.In addition, in the present invention, power supply and grounding parts are arranged along reference direction, but reference direction can according to the setting area free setting of glass antenna, if especially for motor vehicle glass pane, be then preferably set to the direction parallel with the edge of glass pane, horizontal direction or vertical.
In the mode of following explanation, horizontal plane when window glass for vehicle is equipped on vehicle is as reference direction.It should be noted that, the present invention is not defined in front glass, also can be mounted in the rear glass of vehicle rear, be arranged on the side glass of side portion of vehicle.
Fig. 1 is the vertical view of Vehicular glass antenna 100 of the present invention.The passive conductor of antenna conductor and configuration near this antenna conductor and the power supply 16A be mutually separated along the reference direction (such as, level or approximate horizontal direction) of regulation and grounding parts 16B flatness are arranged at the antenna of window glass for vehicle 12 by Vehicular glass antenna 100.
Vehicular glass antenna 100 possesses the antenna element 1 as the first element, the antenna element 2 as the second element, the antenna element 3 as third element and the antenna element 4 as fourth element as antenna conductor pattern.Antenna element 1 with power supply 16A for starting point is along parallel with reference direction and extend towards direction and first direction (right on accompanying drawing) with grounding parts 16B opposite side.The terminal extended to first direction of antenna element 2 and antenna element 1 and first terminal portion 1g are (namely, with the terminal of power supply 16A opposition side) be connected, along orthogonal with antenna element 1 and extend towards the direction of inner side and second direction (below on accompanying drawing) relative to the periphery of glass pane 12.Antenna element 2, both can extend towards second direction linearity for starting point with terminal part 1g, also can extend towards second direction is bending.Antenna element 3 with the terminal of the extension of antenna element 2 i.e. the second terminal part 2g for starting point, along with first party in the opposite direction namely third direction (left on accompanying drawing) extend.Further, antenna element 3 to third direction extend terminal and third terminal portion 3g relative to passive component 5 described later be positioned at first direction side (that is, relative to passive component 5 be positioned at right side region on).Antenna element 4 with the point on antenna element 2 for starting point extends along first direction.The starting point of the antenna element 4 of Fig. 1 with terminal part 2g for starting point extends along first direction.
It should be noted that, also can not use antenna element 4, but as described later, be provided with the glass antenna of antenna element 4 compared with not arranging the situation of antenna element 4, the average sensitivity of glass antenna improves.
In addition, Vehicular glass antenna 100 possesses the passive component 5 as passive component and the passive component 6 as attached passive component as the pattern of passive conductor.Passive component 5 is at least partially with the element that grounding parts 16B extends along second direction for starting point.Passive component 6 is elements that are parallel with above-mentioned reference direction and that be connected with passive component 5 and extend, by terminal i.e. the 5th terminal part 5g extended to second direction of passive component 5.
It should be noted that, also can not use passive component 6, but the glass antenna being provided with passive component 6 is not compared with arranging the situation of passive component 6, the average sensitivity of glass antenna improves.
At this, " terminal part " both can be the terminal of the extension of passive component or antenna element, also can be near conductor part in front of this terminal and terminal.
Power supply 16A and the antenna conductor be connected with power supply 16A and grounding parts 16B and the passive conductor that is connected with grounding parts 16B are by being printed on the car inner surface of glass pane plate by the paste containing conductive metal such as silver-colored paste, and sintering and being formed.But, be not defined in this formation method, the thread like body be made up of conductive materials such as copper or foil-like body can be formed in vehicle side surface or the car outer surface of glass pane, also can be pasted onto on glass pane by binding agent etc., the inside of glass pane self can also be arranged on.
If glass antenna in the past, when then having power supply and grounding parts, the antenna as dipole-type uses, and is connected by the inner conductor of coaxial cable with power supply, and the external conductor of coaxial cable is connected with grounding parts, and will connect from glass antenna to amplifier via coaxial cable.Vehicular glass antenna of the present invention in grounding parts 16B is directly connected from body panels on different, be the antenna of monopole type.The Received signal strength of the electric wave received by antenna conductor via the first electroconductive member be electrically connected with the power supply 16A being equivalent to supply terminals, to the signal processing circuit transmission being equipped on vehicle.On the other hand, passive conductor via the second electroconductive member for grounding parts 16B and vehicle body being electrically connected, and is grounded on vehicle body.Electrical connection comprises conductor and is in direct contact with one another and the situation of galvanic ground conducting and conductor predetermined distance and form capacitor and the high frequency ground situation of conducting away from each other.
Figure 10 A is the cutaway view representing syndeton example power supply 16A and signal processing circuit 20 are electrically connected.Figure 10 B is the cutaway view representing an example of grounding parts 16B and vehicle body being carried out to the syndeton of grounding connection.
In Figure 10 A and 10B, 12 is window glass for vehicle, and 11 is the body panels (overall diagram omission) be made up of wainscot 11a and outer panels 11b, and its end is that L-shaped ground is formed with flange, so that glass pane 12 is arranged at vehicle body.13 is the binding agents (or filler) flange of body panels 11 and glass pane 12 bondd, 14 is the antenna elements configured in car indoor (diagram below), 18 is amplifier shell fixing in the car indoor of wainscot 11a, 20 be the signal processing circuit that arranges in the inside 19 of amplifier shell 18 (such as, the printing wiring substrate of the receiving circuits such as amplifier is installed), 22 is insulating trips, 28A, 28B is the support formed by insulative resin materials such as ABS, 29A remains the engagement member as the first electroconductive member that is scalable and that be oppositely disposed with the below of power supply 16A in the cylinder portion of support 28A, 29B remains the engagement member as the second electroconductive member that is scalable and that be oppositely disposed with the below of grounding parts 16B in the cylinder portion of support 28B, 30A is the coupling member of the conductivity be electrically connected in the lower surface of engagement member 29A and signal processing circuit 20, 30B is the coupling member of the conductivity be electrically connected by the cover cap 24 of the lower surface of engagement member 29B and amplifier shell 18.
Amplifier shell 18 possesses the base member 23 of roughly cross section crank shape and is held in the cover cap 24 of base member 23.By by bolt 27 with on the earthing component and wainscot 11a of body side the nut 26 fixed screw togather, base member 23 is held in wainscot 11a.Base member 23 and cover cap 24 both can be metal, also can be pasted with conductor at resinous surface integral.
By being formed as this kind of syndeton, and the Received signal strength of the electric wave that the antenna conductor by glass antenna can be received is via power supply 16A, engagement member 29A, coupling member 30A, reliably supplies to signal processing circuit 20.And, by the grounding parts 16B of glass antenna and the passive conductor be connected with grounding parts 16B via engagement member 29B, coupling member 30B, amplifier shell 18 (cover cap 24), reliably can be grounded on vehicle body.
It should be noted that, about the more detailed structure of Figure 10 A, common with the content disclosed in Japanese Laid-Open 2003-347817 publication, therefore the description thereof will be omitted.
In addition, may not be engagement member 29B, coupling member 30B, and as shown in figure 18, at grounding parts 16B, elastic connection element 31 is set as the second electroconductive member, be electrically connected with vehicle body.As shown in figure 19, elastic connection element 31 comprises: the metallic plate 35 with the connecting portion 34 be electrically connected with grounding parts 16B by soldering etc.; And on this metallic plate 35, the elastic plate 33 of setting is bent in arch.Elastic connection element 31 binding agent etc. also can be utilized to be bondd with grounding parts 16B by metallic plate 35 and with grounding parts 16B high frequency be connected.The elastic connection element 31 being arranged at grounding parts 16B is when boning glass pane 12 with the end of body panels 11 via binding agent 13, and elastic plate 33 strain occurs and carries out face with body panels 11 and contact.Thus, even if do not have special structure also can by grounding parts 16B and body panels 11 grounding connection in body side.
On the other hand, the car outer surface of the outer panels 11b of body panels 11 usually utilizes coating etc. to carry out applying and forms the paint film 32 of insulating properties, and only elastic connection element 31 carries out contacting, and cannot guarantee galvanic connection.But the area that elastic plate 33 strain occurs and contacts with paint film 32 fully increases, and is connected thus, therefore, it is possible to make grounding parts 16B be grounded on vehicle body with outer panels 11b elastic connection element 31 high frequency.
As the second electroconductive member, the mode of Figure 10 B, Figure 18 is an example, as long as the unit be electrically connected with body panels 11.Also can be configured to the electroconductive member arranging overshooting shape at grounding parts 16B, the electroconductive member of overshooting shape is also chimeric with the Hp contacts of the vehicle body being provided with glass pane plate.And, also the second electroconductive member can not be set, and the protuberance 36 shown in Figure 20 is set in the end of the outer panels 11b of body panels 11.By making grounding parts 16B contact with protuberance 36, and grounding parts 16B directly contacts with body panels 11, thus can ground connection.In this case, even if panel 11b is formed with the paint film 32 of insulating properties outside, by increasing the grounding parts 16B area relative with protuberance 36 fully, and protuberance 36 high frequency ground is connected with outer panels 11b, therefore, it is possible to by grounding parts 16B and vehicle body grounding connection.And, even if grounding parts 16B does not directly contact too with protuberance 36.
In addition, when using coaxial cable as supply lines for powering to antenna conductor via power supply 16A, as long as the inner conductor of coaxial cable is electrically connected with power supply 16A, and by the external conductor of coaxial cable and vehicle body grounding connection.In addition, also the external conductor of coaxial cable can be connected with grounding parts 16B, and via grounding parts 16B and vehicle body grounding connection.
In addition, the formation by being used for being installed on the connector that the electroconductive members such as the wire be connected with signal processing circuit and power supply 16A are electrically connected power supply 16A can also be adopted.In addition, also can adopt the connector be used for electroconductive member and the grounding parts 16B of the wire being grounded on vehicle body etc. are electrically connected is installed on grounding parts 16B.
In addition, can also adopt and by being used for, the inner conductor of coaxial cable and power supply 16A are electrically connected and the connector that external conductor and the grounding parts 16B of coaxial cable are electrically connected are arranged on to the formation of power supply 16A and grounding parts 16B.In this case, grounding parts 16B and connector are electrically connected with vehicle body individually, and the external conductor of coaxial cable is via grounding parts 16B and vehicle body grounding connection.By this kind of connector, easily the inner conductor of coaxial cable is installed on power supply 16A, easily external conductor is installed on grounding parts 16B.And then, also can be configured on the connectors amplifier is installed.
From the viewpoint improving receiving sensitivity, the conductor length that grounding parts 16B is electrically connected required path to body panels 11 is preferably below 50mm.That is, the second electroconductive member is preferably below 50mm from grounding parts 16B to the conductor length of vehicle body.Be more preferably below 30mm, more preferably below 15mm.Being the conductor length D of engagement member 29B and coupling member 30B when the form of Figure 10 B from grounding parts 16B to the conductor length of vehicle body, is elastic connection element 31 is installed on body panels 11 and there occurs the conductor length D of the state of strain when the form of Figure 18.And conductor length D also can be the conductor length D of the form of 0mm, Figure 20 is 0mm.It should be noted that, when high frequency connects, removing forms the conductor separation of capacitor.
The shape of grounding parts 16B, power supply 16A and the interval of grounding parts 16B and power supply 16A can be decided according to the shape of installed surface of the protuberance 36 of above-mentioned engagement member 29A, 29B, elastic connection element 31, body panels or connector, the interval of these installed surfaces.Installing, preference is as square, the roughly square configuration such as square, rectangle, roughly rectangle, polygon-shaped.Also can be the round shape such as circle, circular, ellipse, substantially elliptical.In addition, the area of grounding parts 16B both can be equal with the area of power supply 16A, also can be unequal.In addition, in the case of figure 1, grounding parts 16B is arranged near the third direction side (left side) of power supply 16A, and the edge, right side of grounding parts 16B is relative with the edge, left side of power supply 16A.In addition, the preferred form of the imaginary line center of gravity of grounding parts 16B linked with the center of gravity of power supply 16A is parallel with the bearing of trend of passive component 6 and parallel with the bearing of trend of antenna element 1 and parallel with the bearing of trend of antenna element 3.
Fig. 2 ~ 6 are the vertical views to the Vehicular glass antenna that the antenna element 4 of the Vehicular glass antenna 100 of Fig. 1 is out of shape.Antenna element 4 is such as shown in Fig. 2 ~ 6, with the point (comprising terminal part 1g and terminal part 2g) on antenna element 2 for starting point extends.In the case of figure 2, antenna element 4 with terminal part 1g for starting point extends to the right.In the context of fig. 3, antenna element 4 possesses: the element base 4a extended to the right for starting point with terminal part 1g; And extend downwards from the terminal extended to the right of element base 4a and base portion terminal part 4ag, turn back to the left afterwards and the reflex part (4b, 4c) extended abreast with element base 4a.In the case of figure 4, antenna element 4 possesses: the element base 4a extended to the right for starting point with terminal part 2g; And extend upward from the terminal extended to the right of element base 4a and base portion terminal part 4ag, turn back to the left afterwards and the reflex part (4b, 4c) extended abreast with element base 4a.In Fig. 3,4, the terminal part 4cg of the extension of the structural element 4c of reflex part (4b, 4c) is positioned at right side relative to antenna element 2.When Fig. 5,6, antenna element 4 possess the element base 4aa that extends to the right for starting point with terminal part 1g and the element base 4ab that extends to the right for starting point using terminal part 2g as the structural element of element base 4a.Namely, antenna element 4 both can possess with the antenna base (with reference to Fig. 1 ~ 4) a bit extended to the right for starting point on antenna element 2, also can possess the multiple antenna base (with reference to Fig. 5,6) extended to the right as respective starting point using the multiple points on antenna element 2.And then, the antenna element 3 of the situation of Fig. 6 possesses the part of additional element portion (3b, 3c) as antenna element 3, this additional element portion (3b, 3c) extends upward from terminal part 3ag, turns back to the right afterwards and extends abreast with antenna element 3a.The terminal part extended to the right adding the structural element 3c of element portion (3b, 3c) is positioned at left side relative to antenna element 2.
On the other hand, in FIG, if passive component 5 with grounding parts 16B following on point for starting point with terminal part 5g for terminal in downward direction extends.The starting point of the antenna element 1 of Fig. 1 be than the following central point of grounding parts 16B keep left side following on point.Also can be the left side of grounding parts 16B and following intersection point.
As long as passive component 6 with terminal part 5g for starting point with terminal part 6g for terminal extends to the right.
Fig. 7,8 is vertical views of the Vehicular glass antenna after being out of shape by the passive component 6 of the Vehicular glass antenna 100 of Fig. 1.As shown in Figure 7,8, passive component 6 also can be extended by terminal part 5g in the horizontal direction.In the case of fig. 7, passive component 6 with terminal part 5g for starting point with terminal part 6g for terminal extends to the left.In the case of fig. 8, passive component 6 with terminal part 5g for starting point with terminal part 6rg, 6lg for terminal to the left and right two directions extend.
But, in the present invention, if the aerial wavelength of the centre frequency of the broadcast band that should receive is λ 0, glass wavelength LVFS is k (wherein k=0.64), λ g0during k, the conductor length x5 of passive component 5 and the conductor length x6 sum of passive component 6 are (4/64) λ g~ (13/64) λ g(especially (6/64) λ g~ (11/64) λ g) improve this broadcast band antenna gain on can obtain preferred result.Especially x5 is preferably (1/64) λ g~ (5/64) λ g(especially (2/64) λ g~ (4/64) λ g), x6 is preferably (3/64) λ g~ (8/64) λ g(especially (4/64) λ g~ (7/64) λ g).
At this, the centre frequency of ground wave digital television broadcast band (470 ~ 770MHz) of such as Japan is the λ of 620MHz, 620MHz gfor 309.7mm.When 470 ~ the 600MHz carried out with the existing broadcast in the broadcast band of ground wave digital television is for frequency acceptance band, 535MHz can be set as centre frequency, when 470 ~ 710MHz in ground wave digital television broadcast being with is as frequency acceptance band, 590MHz can be set as centre frequency.
Therefore, such as, in order to improve ground wave digital television broadcast band (473 ~ 713MHz) antenna gain time, the centre frequency of ground wave digital television broadcast band (473 ~ 713MHz) is about 600MHz (being 593MHz strictly speaking), therefore (x5+x6) can be adjusted to 20 ~ 65mm (especially 30 ~ 55mm).Now, about x5,5 ~ 25mm (especially 10 ~ 20mm) can be adjusted to, about x6,15 ~ 40 (especially 20 ~ 35mm) can be adjusted to.
In addition, in the present invention, if the aerial wavelength of centre frequency of the broadcast band received is λ 0, glass wavelength LVFS is k (wherein k=0.64), λ g0during k, the conductor length x3 sum of the conductor length x1 of antenna element 1 and the conductor length x2 of antenna element 2 and antenna element 3 is (37/64) λ g~ (57/64) λ g(especially (42/64) λ g~ (52/64) λ g) improve this broadcast band antenna gain on can obtain preferred result.Especially x1 is preferably (16/64) λ g~ (24/64) λ g(especially (18/64) λ g~ (22/64) λ g), x2 is preferably (1/64) λ g~ (5/64) λ g(especially (2/64) λ g~ (4/64) λ g), x3 is preferably (20/64) λ g~ (28/64) λ g(especially (22/64) λ g~ (26/64) λ g).
Therefore, such as, when the antenna gain of ground wave digital television broadcast band (473 ~ 713MHz) will be improved, the centre frequency of ground wave digital television broadcast band (473 ~ 713MHz) is about 600MHz (being 593MHz strictly speaking), therefore (x1+x2+x3) can be adjusted to 185 ~ 285mm (especially 210 ~ 260mm).Now, about x1,80 ~ 120mm (especially 90 ~ 110mm) can be adjusted to, about x2,5 ~ 25mm (especially 10 ~ 20mm) can be adjusted to, about x3,100 ~ 140mm (especially 110 ~ 130mm) can be adjusted to.
In addition, in the present invention, if the aerial wavelength of centre frequency of the broadcast band received is λ 0, glass wavelength LVFS is k (wherein k=0.64), λ g0during k, from the starting point of antenna element 2 to extend to the right rear extend stop terminal conductor length L1 (Fig. 1,2 when be equivalent to x4, Fig. 3,4 when be equivalent to (x4a+x4b+x4c), Fig. 5,6 when be equivalent to x4aa (x4ab)) be (3/64) λ g~ (14/64) λ g(especially (6/64) λ g~ (13/64) λ g) improve this broadcast band antenna gain on can obtain preferred result.
Therefore, such as, when the antenna gain of ground wave digital television broadcast band (473 ~ 713MHz) will be improved, the centre frequency of ground wave digital television broadcast band (473 ~ 713MHz) is about 600MHz (being 593MHz strictly speaking), therefore L1 can be adjusted to 15 ~ 70mm (especially 30 ~ 65mm).
In addition, in the present invention, if the aerial wavelength of centre frequency of broadcast band received be λ 0, glass wavelength LVFS is k (wherein k=0.64), λ g0during k, the antenna conductor end being in the leftmost side and the distance xs1 being in the horizontal direction component of the passive end conductor of the rightmost side formed in the element of passive conductor of antenna element 3 are-(5/64) λ g~ (1/64) λ g(especially-(4/64) λ g~ (1/64) λ g) improve this broadcast band antenna gain on can obtain preferred result.
At this, the antenna conductor end being in the leftmost side of antenna element 3 is equivalent to terminal part 3g when Fig. 1 etc., is equivalent to the structural detail 3b of additional element portion in the case of fig. 6.In addition, the passive end conductor being in the rightmost side formed in passive conductor element is equivalent to terminal part 6g when Fig. 1 etc., is equivalent to passive component 5 in the case of fig. 7, is equivalent to terminal part 6rg in the case of fig. 8.
In addition, about the positive and negative symbol of xs1, just be set to during by the position of passive end conductor by being in the antenna conductor end of the leftmost side and being in side, right relative to the imaginary line 21 parallel with second direction, be set to negative when will be in side, left relative to imaginary line 21.
Therefore, such as, when the antenna gain of ground wave digital television broadcast band (473 ~ 713MHz) will be improved, the centre frequency of ground wave digital television broadcast band (473 ~ 713MHz) is about 600MHz (being 593MHz strictly speaking), therefore xs1 can be adjusted to-25 ~ 5mm (especially-20 ~ 5mm).
Above, illustrate the ground wave digital television broadcast band of Japan, but be also suitable for the reception of the ground wave digital television broadcast band of other various countries, as long as the broadcast band received in the scope of 470 ~ 862MHz, just can be used as glass antenna and suitably play a role.
Fig. 1 ~ 8 represent example glass antenna being configured at glass pane 12.15a is the vehicle body opening edge on the upside of vehicle body, is configured in the upper-side area of glass pane 12.By making glass antenna miniaturized, and form demister (not shown) at the middle section of glass pane 12, even if thus the upper-side area of glass pane 12 is narrow, also easily can be configured in this narrow region.In addition, the central upper-side area of glass pane 12, central left field, central right side area, underside area can be also configured in.
In addition, in the present invention, when glass antenna being configured in the region, upper left side of glass pane 12 in the mode of Fig. 1 ~ 8, also can in the region, upper right side of glass pane 12 to configure with the symmetrical mode of the mode of Fig. 1 ~ 8.About underside area too.When arranging multiple glass antenna as mentioned above, become multifarious reception, receiving feature improves, therefore preferably.
In addition, also the conductor layer be made up of antenna conductor can be arranged on the inside of synthetic resin made membrane or its surface, the synthetic resin made membrane of band conductor layer can also be formed in the car inner surface of glass pane plate or car outer surface and as glass antenna.And then, also the flexible circuit board being formed with antenna conductor can be formed in the car inner surface of glass pane plate or car outer surface and as glass antenna.
Glass pane is preferably 15 ~ 90 ° relative to the setting angle of vehicle relative to horizontal direction, is especially preferably 30 ~ 90 °.
In addition, also can form shielding film on the face of glass pane, this shielding film arranges a part or the entirety of antenna conductor.Shielding film can there are the potteries such as black ceramic membrane.In this case, when observing outside the car of glass pane, the part of the antenna conductor be arranged on shielding film can not be seen due to shielding film from car, form the glass pane of excellent in design.In the construction illustrated, by by being formed on shielding film at least partially in power supply, grounding parts, antenna conductor, passive conductor, and only can see the thin straight line portion of conductor outward when car is observed, in design preferably.
Embodiment
Observe upper left side in car about the front glass by the form of the glass antenna shown in Fig. 1 being arranged on actual vehicle and the automobile-use high frequency glass antenna that makes, its measured result such as frequency characteristic, directional properties is described.Figure 11 A is the schematic diagram of the electric power-feeding structure of glass antenna 100 of the present invention, and Figure 11 B is the schematic diagram of the electric power-feeding structure of glass antenna X (Japanese Laid-Open 2007-110390 publication) in the past.Glass antenna 100 is suitable for the reception of the electric wave of high frequency band, is especially suitable for the reception of ground wave digital television broadcast band (470 ~ 770MHz).Each portion of each glass antenna is of a size of the value (unit is mm) shown in Figure 11 A and 11B.
The conductor width of each element is 0.8mm.Power supply 16A's and grounding parts 16B is measure-alike.About other figure described later too.
When Figure 11 A, inner conductor and the power supply 16A of the coaxial cable be connected with signal processing circuit connect, its external conductor and vehicle body grounding connection.In addition, grounding parts 16B also with vehicle body grounding connection.When Figure 11 B, the inner conductor of the coaxial cable be connected with signal processing circuit and power supply connect, its external conductor and vehicle body grounding connection.That is, when the electric power-feeding structure shown in Figure 11 A, the passive conductor of glass antenna 100 and vehicle body grounding connection, on the other hand when the electric power-feeding structure shown in Figure 11 B, the passive conductor of glass antenna X not with vehicle body grounding connection.
The mensuration of antenna gain is as described below mensuration, to tilt 15 ° the motor vehicle emitting radio waves installed, motor vehicle is measured with the angle rotating 360 degrees of every 3 ° for glass pane relative to horizontal direction.Electric wave is horizontal partial wave, and frequency changes with every 6MHz in the scope of 473 ~ 713MHz.Under the transmission position of electric wave and the elevation angle of antenna conductor are horizontal direction (set face parallel to the ground as the elevation angle=0 °, top-direction be the elevation angle=90 ° time, the direction of the elevation angle=0 °) measure.Antenna gain take half wavelength dipole antenna as benchmark, has carried out standardization in the mode making half wavelength dipole antenna become 0dB.
Figure 12 is the frequency characteristic figure of the antenna gain of glass antenna 100 and glass antenna X.In the frequency characteristic figure of antenna gain, the antenna gain of the longitudinal axis represents by making motor vehicle rotating 360 degrees with the mean value (mean value of the antenna gain of the every 6MHz in whole frequency 473 ~ 713MHz) of every 3 ° of antenna gains measured.About other figure described later too.
Figure 13 is the directional properties figure according to receive frequency of the directive property of glass antenna 100 and glass antenna X.Directional properties chart is shown in the directional properties of the vehicle complete cycle of the glass antenna that front glass is installed, and every 3 ° of ground represent the mean value of the antenna gain of the every 6MHz in whole frequency 473 ~ 713MHz.In figure, the first half is equivalent to the front region of vehicle, and the latter half is equivalent to the rear area of vehicle.
[table 1]
Average gain [dB] Mean F/B ratio
100 -3.5 6.0
X -3.5 9.1
Table 1 be to Figure 12,13 the table that gathers of data.When calculating the average gain in the whole frequency band of 473 ~ 713MHz, glass antenna 100 is-3.5dB, and glass antenna X is-3.5dB, about the average gain in whole frequency band, guarantees and in the past equal gain.On the other hand, calculate F/B than time, glass antenna 100 is 6.0, and glass antenna X is 9.1, and glass antenna 100 is compared with the past, and differing from of the sensitivity at vehicle front and rear reduces.In addition, according to Figure 13, the antenna gain on overall width direction is more excellent than glass antenna X in the past.
It should be noted that, F/B ratio refer to set motor vehicle front as 0 " zero " °, motor vehicle left is+90 °, motor vehicle rear for+180 ° time, the difference of the antenna gain mean value (every 1 °) of the antenna gain mean value (every 1 °) of-90 ° ~+90 ° (vehicle front sides) of horizontal direction and+90 ° ~+270 ° (motor vehicle rear side) of horizontal direction.
If F/B is smaller, then the difference of the antenna gain in vehicle front direction and direction, the motor vehicle back side reduces, and becomes in the horizontal direction close to non-direction directive property.On the contrary, if F/B is than large, then vehicle front direction has highly directive.The calculating of average antenna gain has been suitable for area averaging method.
In addition, the transverse width of the glass antenna 100 of Figure 11 A is 190 (=30+5+120+35) mm, in contrast, the transverse width of the glass antenna X of Figure 11 B is 200 (=140-60+120) mm.Therefore, glass antenna 100, relative to glass antenna X in the past, achieves miniaturization.
In addition, Figure 14 is in the glass antenna 100 of the pattern of Fig. 1, the measured data of antenna gain when conductor length x4 is changed.In order to confirm the effect of conductor length x4, in the glass antenna 100 when surveying the data shown in Figure 14, grounding parts and passive conductor are not set.Conductor length x4 represents the situation not having antenna element 4 when being zero, along with extending to the right, x4 increases.
Each portion of the glass antenna 100 shown in Fig. 1 is of a size of
x1:100mm
x2:10mm
x3:120mm。
As shown in figure 14, when ground wave digital television broadcast band (470 ~ 770MHz), conductor length x4 is more than 15mm and the situation of below 70mm (especially more than 30mm and below 65mm) improve antenna gain on preferably.
In addition, Figure 15 is not arranged in the pattern of antenna element 4 in the glass antenna 100 shown in Fig. 1, the measured data of antenna gain when terminal part 3g and terminal part 6g overlap distance xs1 is in the horizontal direction changed.The overlap distance xs1 of transverse axis be on the occasion of time, represent that the projection of the above-below direction of the figure of the element of a side in two elements 3 and 6 is in the position relationship repeated with the element of the opposing party.On the other hand, when overlap distance xs1 is negative value, represents and be in the position relationship do not repeated.That is, on the occasion of time, represent antenna element 3 situation overlapping with passive component 6, when negative value, between expression terminal part 3g and terminal part 6g, there is the situation in gap in the horizontal direction.When x6 is 35mm, xs1 is zero.
Each portion of the glass antenna 100 when measuring the data of Figure 15 is of a size of
As shown in figure 15, situation about mutually repeating with element 3 and the projection of the above-below direction of 6 is compared, and the antenna gain of unduplicated situation improves.Such as, when ground wave digital television broadcast band (470 ~ 770MHz), terminal part 3g and terminal part 6g gap be in the horizontal direction-25 ~ 5mm (especially-20 ~ 5mm) improve in antenna gain preferred.
In addition, Figure 16 is the frequency characteristic figure of the antenna gain of glass antenna 100 ~ 600.The change of the antenna gain that the difference of the pattern of the antenna conductor of glass antenna of the present invention causes is compared.
The antenna conductor of each glass antenna shown in Fig. 1 ~ 6 is of a size of
The size of the passive conductor of each glass antenna shown in Fig. 1 ~ 6 is equal between each glass antenna, for
x5:15mm
x6:30mm。
[table 2]
Pattern 100 200 300 400 500 600
Average gain [dB] -3.4 -3.6 -3.6 -3.5 -3.8 -3.5
Table 2 is the tables gathered the data of Figure 16.When calculating the average gain on the whole frequency band of 473 ~ 713MHz, the average gain on the whole frequency band of glass antenna 100 is the highest.
In addition, glass antenna 100 ~ 600, compared with the antenna gain (with reference to table 1) of glass antenna X in the past, is guaranteed equal antenna gain and achieves miniaturization.
In addition, Figure 17 be glass antenna 100A, 100B, 700 ~ 900 the frequency characteristic figure of antenna gain.The change of the antenna gain that the difference of the pattern of the passive conductor of glass antenna of the present invention causes is compared.The difference of 100A and 100B is the conductor length x5 of the passive component 5 in the mode of the glass antenna 100 shown in Fig. 1.
The antenna conductor of Fig. 1, each glass antenna shown in 7,8,9 is of a size of
The passive conductor of Fig. 1, each glass antenna shown in 7,8,9 is of a size of
[table 3]
Pattern 100A 100B 700 800 900
Average gain [dB] -3.4 -3.9 -3.5 -3.4 -5.4
Table 3 is the tables gathered the data of Figure 17.When average gain on the whole frequency band of 473 ~ 713MHz is calculated, with do not have passive conductor glass antenna 900 situation compared with, glass antenna 100A, 100B, 700, the average gain of 800 all shows high value.
Therefore, in the antenna mode that glass antenna 100 ~ 800 is such, by arranging the electric power-feeding structure passive conductor being grounded on vehicle body, and the antenna performance of the excellence covering large frequency band can be guaranteed and realize the miniaturization of antenna pattern.In addition, by glass antenna 100 ~ 800 being installed on front glass or rear glass, and the receiving sensitivity of the electric wave from overall width direction can be improved.And then, by glass antenna 100 ~ 800 being arranged on front glass and this two side of rear glass, and the antenna performance of the directive property of the circular centered by vehicle can be obtained, the receiving sensitivity of the electric wave from overall width direction can be improved.
In detail or describe the application with reference to specific example, those skilled in the art are known can carry out various change, correction without departing from the spirit and scope of the present invention.
The Japanese patent application (Patent 2009-100213) that the application proposed based on April 16th, 2009, and its content is introduced in this as reference.
Industrial applicibility
The present invention is used in the automobile-use glass antenna received the digital television broadcasting of the analog television broadcast of surface wave digital television broadcasting, UHF band and the digital television broadcasting (698 ~ 806MHz) of the U.S., the digital television broadcasting (470 ~ 862MHz) in european union region or the People's Republic of China (PRC).In addition, also FM broadcast band (76 ~ 90MHz) of Japan can be used in, FM broadcast band (88 ~ 108MHz) of the U.S., TV VHF is with (90 ~ 108MHz, 170 ~ 222MHz), 800MHz band (810 ~ 960MHz) of motor vehicle phone, 1.5GHz band (1.429 ~ 1.501GHz) of motor vehicle phone, UHF is with (300MHz ~ 3GHz), GPS (Global Positioning System), the gps signal 1575.42MHz of moonlet), VICS (registered trade mark) (Vehicle Information and Communication System:2.5GHz).
And then, also ETC communication (Electronic Toll Collection System: without the need to automatic fee system of stopping can be used in, the transmission frequency of trackside wireless device: 5.795GHz or 5.805GHz, the receive frequency of trackside wireless device: 5.835GHz or 5.845GHz), Dedicated Short Range Communications, (DSRC:Dedicated Short Range Communication, 915MHz is with, 5.8GHz band, 60GHz is with), microwave (1GHz ~ 3THz), millimeter wave (30 ~ 300GHz), automobile-use enters system (300 ~ 450MHz) without key, and SDARS (Satellite Digital Audio Radio Service: Satellite Digital Audio Radio business (2.34GHz, communication 2.6GHz)).
Label declaration:
1 ~ 4 antenna element
5,6 passive components
11 body panels
11a wainscot
11b outer panels
12 glass panes
13 binding agents
14 antenna elements
Vehicle body opening edge on the upside of 15a vehicle body
16A power supply
16B grounding parts
18 amplifier shell
The inside of 19 amplifier shell 18
20 signal processing circuits
21 imaginary lines
22 insulating trips
23 base members
24 cover caps
26 nuts
27 bolts
28A, 28B support
29A first engagement member
29B second engagement member
30A first coupling member
30B second coupling member
31 elastic connection elements
32 paint film
33 elastic plates
34 connecting portions
35 metallic plates
36 protuberances
100 ~ 800 Vehicular glass antennas (there is passive conductor)
900 Vehicular glass antennas (there is not passive conductor)
X Vehicular glass antenna in the past (there is passive conductor)

Claims (14)

1. a Vehicular glass antenna, the grounding parts being provided with antenna conductor, the power supply be connected with this antenna conductor, passive conductor and being connected with this passive conductor in glass pane, is characterized in that,
When described glass pane is equipped on vehicle, described power supply is the position for being electrically connected with the signal processing circuit being equipped on vehicle by described antenna conductor, described grounding parts is the position for being electrically connected with vehicle body by described passive conductor, and described grounding parts is directly electrically connected with vehicle body
Described power supply and described grounding parts are arranged along reference direction,
Described antenna conductor possesses:
With described power supply for starting point is along the first element that is parallel with described reference direction and that extend towards direction and the first direction of the opposition side of described grounding parts;
With being connected with the terminal of described power supply opposite side and first terminal portion of described first element, and along the second element that is orthogonal with described first element and that extend towards direction and the second direction of inner side relative to the periphery of described glass pane; And
With the third element that described second element extends along direction opposite to the first direction and third direction for starting point,
Described passive conductor possesses passive component, and this passive component is at least partially with the element that described grounding parts extends along described second direction for starting point,
From described grounding parts to the conductor length of described vehicle body be below 50mm,
Described Vehicular glass antenna is the antenna of monopole type.
2. Vehicular glass antenna according to claim 1, wherein,
Described antenna conductor possesses the fourth element extended along described first direction for starting point with described second element.
3. Vehicular glass antenna according to claim 2, wherein,
Many described fourth element with described second element for starting point extends along described first direction.
4. the Vehicular glass antenna according to Claims 2 or 3, wherein,
Described fourth element possesses reflex part, and this reflex part extends along described first direction, afterwards, extends in the opposite direction along described second direction or with described second party, and then turns back to described third direction side and extend.
5. the Vehicular glass antenna according to Claims 2 or 3, wherein,
If the aerial wavelength of centre frequency of the broadcast band received is λ 0, glass wavelength LVFS is k, λ g0during k, wherein, k=0.64,
The conductor length of described fourth element is (3/64) λ gabove and (14/64) λ gbelow.
6. Vehicular glass antenna according to any one of claim 1 to 3, wherein,
Described passive conductor possesses attached passive component that is parallel with described reference direction and that be connected with described passive component.
7. Vehicular glass antenna according to claim 6, wherein,
If the aerial wavelength of centre frequency of the broadcast band received is λ 0, glass wavelength LVFS is k, λ g0during k, wherein, k=0.64,
The conductor length sum of described passive component and described attached passive component is (4/64) λ gabove and (13/64) λ gbelow.
8. Vehicular glass antenna according to any one of claim 1 to 3, wherein,
If the aerial wavelength of centre frequency of the broadcast band received is λ 0, glass wavelength LVFS is k, λ g0during k, wherein, k=0.64,
The conductor length sum of described first element, described second element and described third element is (37/64) λ gabove and (57/64) λ gbelow.
9. Vehicular glass antenna according to any one of claim 1 to 3, wherein,
Described third element possesses additional element portion, and this additional element portion extends along described third direction, afterwards, extends in the opposite direction along described second direction or with described second party, and then turns back to described first direction side and extend.
10. Vehicular glass antenna according to any one of claim 1 to 3, wherein,
Described third element by described third direction side antenna conductor end and formed in the element of described passive conductor by described first direction side passive end conductor between the distance of described first direction component, when by the position of described passive end conductor with respect to described antenna conductor end and the imaginary line parallel with described second direction is positioned at described first direction side time be just set to, the position of described passive end conductor is positioned at described third direction side relative to described imaginary line time be set to negative, for more than-25mm and below 5mm.
11. Vehicular glass antennas according to any one of claim 1 to 3, wherein,
The broadcast band received is in the scope of 470 ~ 862MHz.
12. 1 kinds of window glass for vehicle, is characterized in that, are provided with the Vehicular glass antenna according to any one of claim 1 to 11.
13. window glass for vehicle according to claim 12, wherein,
The second electroconductive member be electrically connected with described vehicle body by described grounding parts is possessed at grounding parts.
The electric power-feeding structure of 14. 1 kinds of Vehicular glass antennas, possesses:
Window glass for vehicle according to claim 12;
By the first electroconductive member that described power supply is electrically connected with described signal processing circuit; And
The second electroconductive member that described grounding parts is electrically connected with vehicle body.
CN201080016848.3A 2009-04-16 2010-04-13 Vehicle glass antenna, vehicle window glass, and vehicle glass antenna feeding structure Expired - Fee Related CN102396106B (en)

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