JP2010074656A - Group antenna and group antenna mounting method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To structure an antenna necessary for a moving body provided with a receiver with a group antenna comprising at least two antennas including a loop antenna, in order to receive terrestrial digital broadcasting well. <P>SOLUTION: A group antenna 71 includes a loop antenna 10A with directivity in the perpendicular direction against an antenna installation face and with a rectangular antenna pattern, a rectangular loop conductor 51 provided with an adjacent part paralleled by a little distance P in one of the right and left shoulder parts of the loop antenna 10A, and a linear conductor 52 extending in the perpendicular direction against the loop conductor from an adjacent power feeding terminal on a power feeding terminal formed on one of the conductors in the longitudinal direction of the rectangular conductor, and a monopole antenna 71M with directivity in the perpendicular direction against the linear conductor 52. If the antenna is installed on an automobile front glass 1, two sets of group antennas are each positioned at the right and left of the top end of the front glass. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a set antenna and a method for mounting the set antenna, and in particular, is attached to a radio wave receivable area of a moving body such as a vehicle and can efficiently receive radio waves coming from the front of the vehicle and radio waves coming from the side of the vehicle. Further, the present invention relates to a group antenna composed of at least two antennas and a method for mounting the group antenna.

  2. Description of the Related Art Conventionally, a mobile body equipped with a receiver, for example, a vehicle such as an automobile, is equipped with an antenna that enables reception of radio waves while moving. Radio waves received by vehicles have been mainly AM radio wave (MW), FM radio and TV ultra-high frequency (VHF) and ultra-high frequency (UHF) for many years. On the other hand, in recent years, antennas for transmitting and receiving radio waves in a high frequency band, such as antennas for GPS (Global Positioning System) and antennas for receiving terrestrial digital TV broadcasts (hereinafter referred to as DTV), have been mounted on vehicles. ing.

  In addition, a mobile body equipped with a receiver is not limited to a vehicle, but can be carried out of a mobile phone equipped with a GPS function, a portable television capable of receiving a DTV, or both a GPS function and a DTV reception function. The types of portable navigation devices (PNDs) that can be used are expanding. And an antenna is required for the mobile body provided with the receiver.

  When these antennas are attached to an automobile, which is a moving body, the installation location of the antenna is generally a vehicle windshield. When the antenna is attached to the windshield, the antenna is formed on a transparent film sheet and attached to the windshield with an adhesive material (patented) Reference 1). Such a film antenna is often formed with a horizontally long loop antenna.

  However, since the directivity of the loop antenna for receiving the DTV attached to the upper part of the windshield is in front of the vehicle, there is a problem that reception becomes difficult when the vehicle changes its traveling direction. In order to solve this problem, the inventor of the present application devised a loop antenna having a change in directivity as shown in Patent Document 2 together with the joint inventor, and provided a minimum number thereof on the top of the windshield. Thus, an inexpensive and easy-to-install vehicle antenna device with improved DTV reception directivity has been proposed.

  Here, the vehicle antenna device described in Patent Document 2 will be briefly described with reference to FIGS. 1 and 2. FIG. 1B shows a configuration of a loop antenna 10A formed on a normal transparent film 24. A rectangular shape formed on a sheet-like transparent film 24 by a conductor such as silver paste or copper foil. Antenna conductor 23, and power supply terminals 11 and 12 for supplying power to the antenna conductor 23. The power supply terminals 11 and 12 are provided close to positions symmetrical with respect to a center line that bisects the loop antenna 10A to the left and right. FIG. 2B shows the loop antenna 10A installed on the top of the windshield of the automobile and viewed from above the automobile. Reference numeral 2 denotes an automobile roof 2, and the directivity of the loop antenna 10 </ b> A faces the traveling direction F of the vehicle.

  FIG. 1C shows the configuration of the loop antenna 10B proposed in Patent Document 2, and includes a rectangular antenna conductor 23 formed of a conductor on a sheet-like transparent film 24, and an antenna conductor 23. Are provided with power supply terminals 11 and 12 for supplying power. In the loop antenna 10B, the power feeding terminals 11 and 12 are provided close to the left end with respect to a center line that bisects the loop antenna 10B to the left and right. FIG. 2C shows the loop antenna 10B installed on the top of the windshield of the automobile and viewed from above the automobile. Reference numeral 2 denotes the roof portion 2 of the automobile, and the directivity of the loop antenna 10B faces the right side R with respect to the traveling direction F of the vehicle.

  FIG. 1 (d) shows a configuration of the loop antenna 10 </ b> C proposed in Patent Document 2, and includes a rectangular antenna conductor 23 formed of a conductor on a sheet-like transparent film 24, and an antenna conductor 23. Are provided with power supply terminals 11 and 12 for supplying power. In the loop antenna 10B, the power supply terminals 11 and 12 are provided close to the right end with respect to a center line that bisects the loop antenna 10B to the left and right. FIG. 2A shows the loop antenna 10C installed on the top of the windshield of the automobile and viewed from above the automobile. Reference numeral 2 denotes the roof portion 2 of the automobile, and the directivity of the loop antenna 10C faces the left side L with respect to the traveling direction F of the vehicle.

  FIG. 1A shows a configuration of a vehicular antenna device 50 in which the loop antennas 10A to 10C described in FIGS. 1B to 1D are attached to upper left and right sides of a windshield 1 of an automobile. Yes, the windshield 1 of the automobile and its surroundings are viewed from the vehicle interior side. The antenna device 50 is for receiving DTV, and is composed of two loop antennas 10A on both ends of the windshield 1 and loop antennas 10B and 10C arranged adjacent thereto. Each of the four loop antennas 10A, 10B, and 10C is connected to a power feeding circuit including a connector 20 and a coaxial cable 22.

  Signals received by the loop antennas 10 </ b> A, 10 </ b> B, and 10 </ b> C are input to a power feeding circuit including a coaxial cable 22 through the connector 20. The coaxial cable 22 is disposed along the A-pillar 3 of the automobile and is connected to a DTV tuner (not shown). Reference numeral 8 denotes a car navigation device installed on an instrument panel 9 of an automobile, and receives an image signal from a DTV tuner.

  Accordingly, as shown in FIG. 1A, the directivity in the vertical direction of the antenna device 50 in which the loop antennas 10A, 10B, and 10C are arranged in the vicinity of the roof portion 2 on the upper part of the windshield 1 of the automobile 60 is 2 (d), it is obliquely upward with respect to the traveling direction F of the vehicle, and the horizontal directivity is relative to the traveling direction F of the vehicle as shown in FIG. It becomes the left front direction L and the right front direction R. For this reason, even if the vehicle changes its traveling direction, the DTV radio wave can be received well, and the reception performance of the antenna device 50 is improved.

  In the above description, the antenna directivity indicated by broken lines indicates that the directivity is approximately in this direction, and is not an accurate directivity diagram.

JP 2006-270602 A

Japanese Patent Application No. 2007-293290

  However, the vehicle antenna device proposed in Patent Document 2 is suitable for receiving DTV radio waves arriving from the front or obliquely forward of the vehicle in the traveling direction. There is a problem that reception performance is slightly difficult for reception of radio waves coming from the horizontal direction.

  Therefore, the present invention provides an antenna for receiving a radio wave provided in a mobile body incorporating a receiver, the radio wave coming from a direction perpendicular to the installation surface of at least two antennas including a loop antenna, and the installation of the antenna A combined antenna that can receive both radio waves coming from the horizontal direction parallel to the surface, and that can receive DTV broadcasts in particular, and that is inexpensive and easy to install, and a method of mounting the assembled antenna The purpose is to provide.

  The combined antenna according to the present invention that achieves the above object is a combined antenna composed of at least two independent antennas, and is a rectangular loop antenna and an adjacent portion parallel to one of the left and right shoulders of the loop antenna. And a monopole comprising a linear conductor extending in a direction perpendicular to the loop conductor from a feed terminal adjacent to the feed terminal formed on one of the longitudinal conductors of the rectangular conductor It is a set antenna characterized by including at least an antenna.

  Also, in the method for attaching a group antenna according to the present invention for achieving the above object, a step of attaching a guide tape to a predetermined position on a vehicle cabin side of a glass of a vehicle, and a loop antenna and a monopole antenna are temporarily fixed A step of aligning one film sheet with the surface of the passenger compartment side of the glass using a guide tape, turning one side of the film sheet and removing a part of the release sheet on the back surface, A step of exposing the adhesive material, a step of returning one side of the turned film sheet to the original, and affixing and fixing the transparent film on the surface of the glass compartment with the exposed adhesive material, and the other side of the film sheet Turn off the rest of the release sheet on the back and expose the transparent film adhesive, and the other side of the flipped film sheet Then, the step of adhering and fixing the transparent film to the surface of the glass compartment side with the exposed adhesive material, and removing the film sheet temporarily fixed to the transparent film fixed to the surface of the glass compartment side A pair of antennas, comprising: a step.

According to the set antenna according to the present invention, for example, when a set antenna including a loop antenna and a monopole antenna is installed on a moving body, even when the moving direction of the moving body changes, radio waves, particularly DTV radio waves can be received well. Antenna reception performance is improved.
This is because, for example, when a set antenna consisting of a loop antenna and a monopole antenna is installed in a vehicle that is a moving body, the loop antenna does not receive an incoming wave from the lateral direction of the vehicle, and an incoming wave from the longitudinal direction of the vehicle. On the contrary, the monopole antenna does not receive incoming waves from the front and rear of the vehicle, and can receive incoming waves from the top and bottom and the side of the vehicle.
Specifically, when a pair antenna consisting of a loop antenna and a monopole antenna is mounted along the roof of the vehicle windshield, the loop antenna strongly receives incoming waves from the front of the vehicle due to the reflection of incoming waves at the roof edge. Since the monopole antenna can receive an incoming wave from the lateral direction of the vehicle due to the inclination of the windshield, it is possible to provide a vehicle-mounted antenna with good directivity. In addition, the width of the antenna element attached to the windshield of the vehicle can be reduced, and the area occupied by the antenna element attached to the glass can be reduced by using a monopole antenna. Can be provided.
Furthermore, according to the mounting method of the group antenna according to the present invention, the loop antenna having the directivity in the forward direction and the monopole antenna having the directivity in the lateral direction, for example, the upper right end or the upper left end of the vehicle windshield Can be easily and accurately attached.

  Embodiments of a combined antenna according to the present invention will be described below in detail with reference to the accompanying drawings based on specific examples in which the combined antenna is installed on a windshield of an automobile. In addition, the same code | symbol is attached | subjected and demonstrated about the same structural member demonstrated in FIG. 1, FIG.

  FIG. 3A shows a configuration of a pair antenna 71 according to an embodiment of the present invention. The group antenna 71 of this embodiment is composed of a monopole antenna 71M and a loop antenna 10A.

  As shown in FIG. 3B, the monopole antenna 71M has a long and thin rectangular loop-shaped conductor 51 having a ground-side power supply terminal 53 at the center in the longitudinal direction, and a linear shape having a hot-side power supply terminal 54. The conductor 52 is formed of a conductive material on the transparent base film 17. The ground-side power supply terminal 53 and the hot-side power supply terminal 54 are adjacent to each other, and the linear conductor 52 is provided so as to extend in a direction orthogonal to the loop-shaped conductor 51. FIG. 3C shows a local cross section taken along the line CC in FIG. 3B. On the upper surface side of the base film 17, a loop conductor 51 made of a conductor such as silver paste or copper foil and A transparent protective layer 4 for protecting this is provided, and a pressure-sensitive adhesive (adhesive having a weak adhesive force) 5 is applied to the lower surface side. This adhesive material 5 is covered with a separator 6 that can be peeled off from the adhesive material surface.

  The length of the loop-shaped conductor 51 in the longitudinal direction may be about 1/5 to 1/2 of the wavelength of the radio wave received by this antenna. For example, in the case of an antenna for DTV, it is installed on the window glass of a vehicle. When doing so, about 150 mm is desirable. The length of the loop conductor 51 in the short direction, that is, the width of the loop may be narrow as long as the loop is formed. Further, the length of the linear conductor 52 may be at least 1/10 of the wavelength of the radio wave received by this antenna. For example, in the case of an antenna for DTV and installed on a vehicle window glass, it is about 85 mm. Is desirable.

  As shown in FIG. 3D, the loop antenna 10A is composed of a rectangular loop conductor 55 having two feeding terminals 56 and 57 at the center in the longitudinal direction. The loop conductor 55 is transparent. It is formed of a conductive material on a hollow base film 18. The length in the longitudinal direction of the loop-shaped conductor 55 may be approximately the same as the length in the longitudinal direction of the loop-shaped conductor 51 of the monopole antenna 71M.

  FIG. 3E shows a local cross section taken along line EE of FIG. 3D. On the upper surface side of the base film 18, a loop-shaped conductor 51 made of a conductor such as silver paste or copper foil is provided. A transparent protective layer 4 is provided to protect this, and an adhesive material 5 is applied to the lower surface side. This adhesive material 5 is covered with a separator 6 that can be peeled off from the adhesive material surface.

  In the group antenna 71 of this embodiment, the monopole antenna 71M and the loop antenna 10A configured as described above are arranged as shown in FIG. That is, in the group antenna 71 of this embodiment, the right end portion of the monopole antenna 71M is parallel to the upper left shoulder of the loop antenna 10A (near the upper left end portion and the upper left end portion of the loop-shaped antenna element) by a predetermined length P. It is arranged and configured to be. The length P of the parallel portion is a slight distance. For example, in the case of an antenna for DTV, when installed on the window glass of a vehicle, there is no problem in performance if it is 30 mm or less. Thereby, the length of the width direction of a group antenna becomes small, and an antenna element can be reduced in size as a whole group antenna.

  FIG. 4A shows a configuration of a group antenna 71A which is a modification of the group antenna 71 of the embodiment shown in FIG. The only difference between the group antenna 71A of this modification and the group antenna 71 is the position of the ground-side power supply terminal 53 with respect to the loop conductor 51. That is, in the antenna assembly 71, the ground-side feeding terminal 53 is provided at the center in the longitudinal direction of the loop-shaped conductor 51. However, in this modification, the ground-side feeding terminal 53 is the left end of the loop-shaped conductor 51 in the longitudinal direction. The point provided in the part is different. The point that the linear conductor 52 provided with the hot side power supply terminal 54 is provided adjacent to the ground side power supply terminal 53 is the same. Accordingly, the same components are denoted by the same reference numerals, and the description thereof is omitted.

  FIG. 4B shows an actual assembly state of the combined antenna 71 of the embodiment shown in FIG. After the monopole antenna 71M and the loop antenna 10A are positioned in accordance with the mounting location, the film sheet 7 is placed thereon. The monopole antenna 71M and the loop antenna 10A are placed on the film sheet 7. The set antenna 71 is configured by being temporarily fixed.

  FIG. 5A shows a configuration of a pair antenna 72 according to another embodiment of the present invention. The group antenna 72 of this embodiment is configured by arranging the monopole antenna 71M and the loop antenna 10A shown in FIG. 3B opposite to the left and right of the group antenna 71 shown in FIG. It is a thing. In the pair antenna 72 of this embodiment, the left end portion of the monopole antenna 71M is parallel to the right shoulder of the loop antenna 10A (in the vicinity of the upper right end portion and the upper right end portion of the loop-shaped antenna element) by a predetermined length P in parallel. It is arranged and configured as follows. The length P of the parallel portion may be equal to that of the pair antenna 71. Therefore, the same components are denoted by the same reference numerals, and further description thereof is omitted.

  FIG. 5 (b) shows the assembled antenna 71 of the embodiment shown in FIG. 3 (a) attached to the upper right end of the windshield 1 of the automobile, and the assembled antenna 72 of the embodiment shown in FIG. It is the perspective view which looked at the state attached to the left upper end part of the windshield 1 from the vehicle compartment side. The group antenna 71 and the group antenna 72 are both for receiving DTV, and the connection terminals of the group antenna 71 and the group antenna 72 are connected to a power feeding circuit including four connectors, which will be described later, and a coaxial cable.

  Signals received by the set antenna 71 and the set antenna 72 are input to a power feeding circuit including a coaxial cable via connectors as described with reference to FIG. The coaxial cable is disposed along the A-pillar 3 of the automobile and is connected to a digital TV tuner (not shown). In a digital TV tuner, an input signal is demodulated and then synthesized. The image signal from the digital TV tuner is input to the car navigation device 8 installed on the instrument panel 9 of the automobile.

  FIG. 6 shows the directivity of the four antennas in the windshield 1 of the automobile 60 to which the paired antennas 71 and 72 of the embodiment shown in FIG. 5B are attached. The monopole antenna 71M incorporated in the group antenna 71 and the group antenna 72 has directivity in the left-right direction of the linear conductor 52 shown in FIG. Therefore, the directivity of the radio wave reception in the horizontal direction of the automobile 60 to which the set antennas 71 and 72 are attached is as follows. Left and right direction. For this reason, the receiving sensitivity is good for the traveling direction F of the automobile 60, the left direction LL, and the right direction RR of the automobile 60. Therefore, even if the automobile 60 changes the traveling direction, the DTV radio wave can be received satisfactorily.

  FIGS. 7A to 7C show still another embodiment of the assembled antenna according to the present invention, and the state where the assembled antenna is attached to the upper end of the windshield 1 of the automobile is viewed from the passenger compartment side. It is a thing. In the embodiment shown in (a), two loop antennas 10A and one monopole antenna 71M sandwiched between them are attached to the upper left end portion of the windshield 1, and one monopole is attached to the upper right end portion of the windshield 1. An antenna 71M is attached. In the embodiment shown in FIG. 5B, the group antenna 72 shown in FIG. 5A is attached only to the upper left end portion of the windshield 1. The embodiment shown in (c) is a modification of the embodiment shown in (a), and a monopole antenna 71MA is attached to the upper right end of the windshield 1 instead of the monopole antenna 71M. . In any combination antenna of any of the embodiments, the reception sensitivity is good in the traveling direction and the left-right direction of the automobile.

  FIG. 8A shows the connection between the monopole antenna 71M shown in FIG. 3B and the connector 20 corresponding to the feeding terminals 53 and 54. FIG. In this example, the connector 20 is used in a vertical orientation, and its connection terminals 31 and 32 are connected to a hot-side connection terminal 54 and a ground-side connection terminal 53, respectively.

  FIG. 8B shows a connection between the connector 20 and the monopole antenna 71M1 of the first modification of the monopole antenna 71M shown in FIG. In the monopole antenna 71M1 of the first modification, the ground side connection terminal 53 and the hot side connection terminal 54 are provided adjacent to each other in the horizontal direction. In the first modification, since the linear conductor 52 is provided on a line that bisects the loop conductor 51, the ground side connection terminal 53 is offset to the right with respect to the line that bisects the loop conductor 51. . In this case, the connector 20 is used sideways, and its connection terminals 31 and 32 are connected to the hot side connection terminal 54 and the ground side connection terminal 53, respectively. A modification in which the ground side connection terminal 53 is offset to the left with respect to the line that bisects the loop conductor 51 is also possible.

  FIG. 8C shows the connection between the connector 20 and the monopole antenna 71M2 of the second modification of the monopole antenna 71M shown in FIG. In the monopole antenna 71M2 of the second modified example, the ground side connection terminal 53 is at the same position as the monopole antenna 71M shown in FIG. 3B, but the two hot side connection terminals 54A and 54B are connected to the ground side. The connecting terminals 53 are provided adjacent to each other in the lateral direction. Even in the second modification, the linear conductor 52 is provided on a line that bisects the loop-shaped conductor 51. Therefore, the end of the linear conductor 52 is bifurcated and connected to the two hot-side connection terminals 54A and 54B, respectively. Has been.

  In this case, the connector 20 can be used from either the horizontal direction or the horizontal direction. For example, when it is better to install the monopole antenna 71M2 of the second modified example at the upper right end of the windshield 1 and pull out the coaxial cable 22 of the connector 20 to the right, the connection terminals 31 and 32 of the connector 20 are used. May be connected to the hot-side connection terminal 54A and the ground-side connection terminal 53, respectively. If it is better to install the monopole antenna 71M2 of the second modification at the upper left end of the windshield 1 and pull out the coaxial cable 22 of the connector 20 in the left direction, the connection terminals 31 and 32 of the connector 20 are used. May be connected to the hot side connection terminal 54B and the ground side connection terminal 53, respectively.

  FIGS. 9A and 9B show the appearance of the connector 20 and a state where the connector 20 is disassembled. As shown in FIG. 9A, the connector 20 is configured by combining an inner case 21 and an outer case 25, and is provided on the surface of the inner case 21 (attachment surface to the connection terminals 53, 54, 54A, 54B). Has two openings 21A and 21B, and connecting terminals 31 and 32 having springiness project from the openings 21A and 21B. The surface of the inner case 21 of the connector 20 is fixed on the connection terminals 53, 54, 54A, 54B with an adhesive such as double-sided tape.

  As shown in FIG. 9B, the connection terminals 31 and 32 are attached on one surface of a circuit board (dielectric substrate) 30 built in the inner case 21 and the outer case 25. A coaxial cable 22 is connected to 30. An integrated circuit 40 described later is mounted on the other surface of the circuit board 30. Generally, the connection terminal 31 is a hot side (signal transmission side) terminal, and the connection terminal 32 is a ground side terminal.

  FIG. 10A shows a general configuration of the circuit board 30 inside the connector 20 shown in FIG. 9B except for the inner case 21 and the outer case 25. The connection terminals 31 and 32 are attached to the back side of the circuit board 30 and led to the front side of the circuit board 30 through the through holes 33 and 34. In this example, the through hole 33 is connected to the input terminal of the integrated circuit 40 mounted on the front side of the circuit board 30, and the through hole 34 is connected to the ground wire (outer conductor) 22 </ b> B of the coaxial cable 22. The integrated circuit 40 performs processing such as amplification on the signal received by the antenna, and the processed signal is output to the central conductor (inner conductor) 22 </ b> A of the coaxial cable 22.

  FIG. 10B shows the internal configuration of the integrated circuit 40 shown in FIG. In the integrated circuit 40, there are a filter 41 connected to the antenna 10, an amplifier 42 for amplifying a signal output from the filter 41, and a filter 43 for determining a signal band output from the amplifier 42. The filter 43 blocks direct current. Is connected to the central conductor 22A of the coaxial cable 22 through a capacitor 44. The coaxial cable 22 is a power superimposed cable, and the superimposed power supply voltage (direct current) is supplied to the amplifier 42 through a coil 45 that cuts off an alternating current component.

  FIG. 10C shows a configuration of the circuit board 30 different from the connector 20 shown in FIG. 10A except for the inner case 21 and the outer case 25. In the circuit board 30 of the connector 20 shown in FIG. 10A, the connection terminal 31 is a hot side (signal transmission side) terminal, and is connected to the input terminal of the integrated circuit 40 through the through hole 33. Is a terminal on the ground side, and is connected to the ground line 22B of the coaxial cable 22 through the through hole 34. On the other hand, in the circuit board 30 of the connector 20 shown in FIG. 10C, the connection terminal 31 is a terminal on the ground side, and is connected to the ground line 22B of the coaxial cable 22 through the through hole 34, and the connection terminal 32 is hot. Side (signal transmission side) terminal, which is connected to the input terminal of the integrated circuit 40 through the through hole 33. Thus, if the connection terminal 31 is a ground side terminal and the connection terminal 32 is a hot side terminal, the monopole antenna 71M1 of the first modification shown in FIG. It can be applied when it is better to install the coaxial cable 22 of the connector 20 in the left direction at the end.

  Here, the procedure for attaching the group antenna 71 composed of the loop antenna 10A and the monopole antenna 71M shown in FIG. 3 (a) to the windshield 1 of the automobile is shown in FIGS. 11 (a) to 12 (c). The details will be described. In addition, as shown in FIG.4 (b), the film sheet 7 is attached to the upper surface side of the base film 17 to the group antenna 71 formed on the base film 17 shown to Fig.3 (a), and a base film is shown. As shown in FIGS. 3C and 3E, two separators 6A and 6B that can be separated at the central portion are attached to the surface of the adhesive material 5 on the back surface side of FIG. It is assumed that it is in a state.

  When the assembled antenna 71 is pasted on the windshield 1 of an automobile, first, as shown in FIG. 11B, a marking tape 18 as a guide tape is pasted in advance at a specified position in the vicinity of the black ceramic line 19 on the windshield 1. In addition, the left end of the set antenna 71 is aligned with the marking tape 18. Next, as shown in FIG. 11 (c), the film sheet 7 on the right side of the assembled antenna 71 is turned from the state of FIG. 11 (b), and the separator 6A is peeled off from the back surface of one loop antenna 10A to expose the adhesive material. Thereafter, the right portion of the assembled antenna 71 is attached to the windshield 1 via an adhesive.

  After the right portion of the group antenna 71 is attached and fixed to the windshield 1, the film sheet 7 on the left side of the group antenna 71 is turned over, as shown in FIG. Then, the separator 6B is peeled off from the back surface of the monopole antenna 71M to expose the adhesive material, and then the left portion of the assembled antenna 71 is attached to the windshield 1 via the adhesive material.

  Thereafter, when the film sheet 7 is turned and peeled, and finally the marking tape 18 is peeled off, as shown in FIG. 12 (c), the set antenna 71 positioned at the upper end of the windshield 1 of the automobile is attached. .

  In the embodiment described above, the installation location of the set antenna is described as the windshield of the automobile. However, the set antenna of the present invention is a window glass other than the windshield such as the rear glass of the automobile, an exterior member, and a vehicle other than the automobile. Alternatively, the present invention can also be applied to portable portable electronic devices.

(A) is the perspective view which looked at the windshield of the motor vehicle with which the vehicle antenna device which the present inventors proposed was attached, and its circumference from the vehicle interior side, (b) is the vehicle antenna device shown in (a) (C) is an enlarged plan view showing another loop antenna constituting the vehicular antenna device shown in (a), and (d) is an enlarged plan view showing the loop antenna constituting (a). It is a top view which expands and shows another one of the loop antennas which comprise the vehicle antenna apparatus shown by a). (A) is explanatory drawing which shows the directivity when the loop antenna shown in FIG.1 (d) is installed in the vicinity of a dielectric material, (b) is a loop antenna shown in FIG.1 (a) with a dielectric material. An explanatory diagram showing directivity when installed in the vicinity, (c) is an explanatory diagram showing directivity when the loop antenna shown in FIG. 1 (d) is installed in the vicinity of the dielectric, and (d) is Explanatory drawing which shows the directivity of the orthogonal | vertical direction when the loop antenna shown by (a) to (c) is installed in the windshield upper part of a motor vehicle, (e) is a loop antenna shown by (a) to (c) It is explanatory drawing which shows the directivity of the horizontal direction of each antenna at the time of being installed in the windshield upper part of a motor vehicle. (A) is a front view which shows the structure of one Example of the set antenna which concerns on this invention, (b) is a front view which shows the structure of one antenna of the set antenna shown to (a), (c) is (b) ) Is a local cross-sectional view taken along the line CC of FIG. 9D, FIG. 8D is a front view showing the configuration of the other antenna of the assembled antenna shown in FIG. It is. FIG. 3A is a front view showing a configuration of a modified example of the assembled antenna shown in FIG. 3A, and FIG. 3B is a diagram showing the position of the assembled antenna of the embodiment shown in FIG. It is explanatory drawing which shows the procedure temporarily fixed with a film sheet later. (A) is a front view which shows the structure of another Example of the group antenna which concerns on this invention, (b) is the group antenna of the Example shown to Fig.3 (a) in the upper right end part of the windshield of a motor vehicle It is the perspective view which looked at the state which attached the assembled antenna of the Example shown to Fig.5 (a) to the upper left end part of the windshield of the motor vehicle from the compartment side. It is a top view of the motor vehicle which shows the directivity of four antennas in the windshield of the motor vehicle with which the group antenna of the Example shown in FIG.5 (b) was attached. (A) is the perspective view which looked at the state where another example of the combination antenna concerning the present invention was attached to the left upper end part of the windshield of a car from the passenger compartment side, and (b) is Drawing 5 (a). The perspective view which looked at the state where only the set antenna shown was attached to the left upper end part of the windshield of a car from the passenger compartment side, and (c) is the perspective view of the modification of the example shown in (a). (A) is a figure explaining the connection of the monopole antenna used for the group antenna which concerns on this invention shown in FIG.3 (b), and the connector corresponding to the electric power feeding terminal of this antenna, (b) is FIG. The figure explaining connection of the 1st modification of the monopole antenna used for the group antenna which concerns on this invention shown in b), and the connector corresponding to the electric power feeding terminal of this modification, (c) is FIG. It is a figure explaining the connection of the 2nd modification of the monopole antenna used for the group antenna which concerns on this invention shown to b), and the connector corresponding to the electric power feeding terminal of this modification. (A) is a perspective view which shows an example of the connector connected to the electric power feeding terminal of the group antenna which concerns on this invention, and the external appearance of the coaxial cable connected to this, (b) is a disassembled perspective view of the connector shown to (a). . FIG. 9A is a diagram of an example of the circuit board shown in FIG. 9B viewed from the back side. FIG. 9B is a block circuit diagram showing an internal configuration of an amplifier mounted on the circuit board shown in FIG. (C) is the figure which looked at another example of the circuit board shown in FIG.2 (b) from the back surface side. FIG. 3A shows a film sheet after positioning the antenna according to the embodiment shown in FIG. 3A on which a separator is attached to an adhesive material formed on a transparent film and coated on the back surface. The front view which shows the group antenna of the state temporarily fixed in (b), The state which positioned the group antenna shown to (a) according to the marking tape previously attached to the upper end part of the windshield of the vehicle which is an attachment place (C) is a diagram showing (b), the film sheet on the right side of the assembled antenna is turned from the state of (b), the separator is peeled off from the back surface of one antenna to expose the adhesive material, and then the adhesive material is attached to the windshield. It is a figure explaining a procedure. FIG. 11 (b) and FIG. 11 (c) show the continuation of the attachment procedure, and FIG. 11 (a) shows the assembly after the antenna on the right side of the film sheet is fixed to the windshield in the procedure of FIG. 11 (c). The figure explaining the procedure of turning the film sheet on the left side of the antenna, peeling the separator from the back of the other antenna to expose the adhesive material, and then sticking the adhesive material to the windshield, (b) sticking to the windshield The figure which shows the procedure which peels off a film sheet and removes a marking tape from the assembled antenna which was made, (c) is a figure which shows the assembled antenna positioned in the upper end part of the windshield of a vehicle by the above procedure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Windshield 4 Transparent protective material 5 Adhesive material 6,6A, 6B Separator 7 Film sheet 10A Loop antenna 18 Marking tape 20 Connector 31, 32 Connection terminal 51 Loop conductor 52 Linear conductor 53, 54, 56, 57 Feed terminal 55 Loop-shaped conductor 71 Assembly antenna according to an embodiment of the present invention 72 Assembly antenna according to another embodiment

Claims (8)

A combined antenna composed of at least two independent antennas,
A rectangular loop antenna,
A rectangular loop conductor having an adjacent portion parallel to one of the left and right shoulders of the loop antenna, and a feed terminal adjacent to a feed terminal formed on one of the conductors in the longitudinal direction of the rectangular conductor, with respect to the loop conductor A monopole antenna with a linear conductor extended in a vertical direction;
A set antenna comprising at least   The set antenna according to claim 1, wherein a power supply terminal of the rectangular loop conductor is formed at a central portion of the loop conductor.   2. The set according to claim 1, wherein the feeding terminal of the rectangular loop conductor is formed on the side far from the adjacent portion of the loop conductor and the loop antenna with respect to the central portion of the loop conductor. antenna.   4. The group antenna according to claim 2, wherein the feeding terminal is provided on a conductor adjacent to the loop antenna among two parallel conductors constituting the loop conductor. 5. The antenna pattern and the feeding terminal of the loop antenna and the monopole antenna are respectively formed on one surface of an independent transparent film, and the other surface of the transparent film can adhere the antenna on a dielectric. A release sheet covering the material and this adhesive material is provided,
The transparent film on which the loop antenna and the monopole antenna are formed is temporarily fixed on a single transparent film sheet in a state in which the loop antenna and the monopole antenna are aligned. The combined antenna according to any one of claims 1 to 4, wherein   When the loop antenna is attached to the glass of the vehicle, the two feeding terminals of the loop antenna are arranged at the center near the roof of the vehicle, and when the monopole antenna is attached to the glass, the mono 6. The group antenna according to claim 1, wherein a feed terminal of the rectangular loop conductor of the pole antenna is disposed on a side far from the roof. The vehicle glass is a windshield,
The first set antenna attached to the upper right end portion when viewed from the vehicle interior of the windshield, and the second set antenna attached to the upper left end portion when viewed from the vehicle interior,
The first set antenna is configured such that the loop antenna is disposed on the right side of the film sheet, and the monopole antenna is disposed on the left side thereof.
The set according to claim 6, wherein the second set antenna is configured such that the loop antenna is arranged on the left side of the film sheet and the monopole antenna is arranged on the right side thereof. antenna. Applying a guide tape to a predetermined position on the vehicle compartment side of the glass of the vehicle;
Aligning one film sheet, on which the loop antenna and the monopole antenna are temporarily fixed, with the guide tape on the surface of the glass on the cabin side;
Turning one side of the film sheet and removing a part of the release sheet on the back surface to expose the adhesive material of the transparent film;
Reversing one side of the turned film sheet and attaching the transparent film to the surface of the glass on the side of the passenger compartment with an exposed adhesive;
Turning the other side of the film sheet and removing the rest of the release sheet on the back surface to expose the adhesive of the transparent film;
The other side of the turned film sheet is returned to the original, and the transparent film is attached and fixed to the surface of the glass on the passenger compartment side by an exposed adhesive material; and
The combined antenna according to any one of claims 5 to 7, further comprising a step of removing the film sheet temporarily fixed to the transparent film fixed to a surface of the glass on the passenger compartment side. Mounting method.

Images