JP3187451U - Antenna device - Google Patents

Abstract

An antenna device that does not melt an insulating base member when soldering to a substrate is provided.
An antenna substrate having an antenna element made of a conductor, an antenna mounting substrate having a ground pattern made of a conductor, and an insulation made of a synthetic resin on which the antenna mounting substrate is placed. A first connection electrode 1b connected to the antenna element 1a is provided on one surface of the antenna substrate 1, and a second connection electrode 2b is provided on one surface of the antenna mounting substrate 2. The insulating base member 3 is provided with a recess 3 a, one end 1 c of the antenna substrate 1 is inserted into the recess 3 a, and the antenna substrate 1 is disposed perpendicular to the antenna mounting substrate 2. The first connection electrode 1b and the second connection electrode 2b are connected by soldering, and the first connection electrode 1b and the second connection electrode 2b are provided from any surface of the insulating base member 3. Distance are spaced apart from each other more.
[Selection] Figure 3

Description

  The present invention relates to an antenna device, and more particularly to an antenna device that can be mounted on a roof of a vehicle.

  Conventionally, as an antenna device that can be mounted on the roof of a vehicle, an antenna device having an antenna element and covering the antenna element with an antenna case made of a synthetic resin is known. Furthermore, recently, an antenna case having a streamlined outer shape is often used. This shape is generally referred to as a shark fin shape.

  As such a conventional antenna device, an antenna device described in Patent Document 1 is disclosed. FIG. 10 shows an antenna device 900 that can be mounted on the roof of a vehicle.

  The antenna device 900 according to the prior art is an antenna device that can receive an AM radio band and an FM radio band. The antenna device 900 includes a resin antenna case 910, and an antenna base 911 including a resin insulating base 920 and a metal conductive base 921 fitted to the lower surface of the antenna case 910. An element holder 912 made of a resin-made rectangular frame is erected and attached to the rear side from the center of the upper surface of the antenna base 911, and the amplifier board 916 is attached almost horizontally on the conductive base 921. ing.

  The element holder 912 is composed of a rectangular frame part, and a clamping part for supporting the umbrella-shaped element 913 is formed on the upper part of the frame part. In addition, a coil 914 of about 1 μH to 3 μH, which is connected in series to the umbrella-shaped element 913 and resonates at the FM frequency, is held inside the standing frame on the front side of the element holder 912. The lead wire led out from the upper end of the coil 914 is connected to the terminal of the umbrella-shaped element 913, and the lead wire led out from the lower end of the coil 914 is connected to the power supply terminal 915. The power supply terminal 915 is bent as shown in the figure, and the upper part is fixed to the surface facing the coil 914 of the standing frame on the front side of the element holder 912, and the lower terminal is the input of the amplifier board 916. Connected to the terminal. As a result, the AM / FM reception signal received by the umbrella element 913 having the coil 914 connected in series is amplified by the amplifier assembled on the amplifier board 916. Note that the antenna including the umbrella element 913 and the coil 914 can operate as a non-resonant antenna in the AM radio band.

JP 2012-204996 A

  As described above, in the antenna device 900, the metal conductive base 921 is mounted on the synthetic resin insulating base 920, and the amplifier substrate 916 is mounted on the conductive base 921. Therefore, when the power supply terminal 915 is to be attached to the input terminal of the amplifier board 916 with solder, depending on the distance between the input terminal and the conductive base 921, the heat of the solder may be insulated from the resin via the conductive base 921. There is a problem that the insulating base 920 is melted by the heat transmitted to the base 920.

  The present invention has been made in view of the actual situation of the prior art, and an object thereof is to provide an antenna device that does not melt an insulating base member when soldering to a substrate.

  In order to solve this problem, an antenna device of the present invention includes an antenna substrate having an antenna element made of a conductor, an antenna mounting substrate having a ground pattern made of a conductor, and the antenna mounting substrate. And an insulating base member made of synthetic resin, which transmits and / or receives a high-frequency signal, wherein a first connection electrode connected to the antenna element is provided on one surface of the antenna substrate. And a second connection electrode is provided on one surface of the antenna mounting substrate, a recess is provided in the insulating base member, and one end of the antenna substrate is inserted into the recess. The antenna substrate is disposed perpendicular to the antenna mounting substrate, and the first connection electrode and the second connection electrode are connected by solder. Both the first connection electrode and the second connection electrode has a characteristic that is spaced a predetermined distance or more from any surface of the insulating base member.

  In the antenna device configured in this way, the solder connection portion between the first connection electrode and the second connection electrode is separated from any surface of the insulating base member by a predetermined distance or more by the recess provided in the insulating base member. When the first connection electrode on the substrate and the second connection electrode on the antenna mounting substrate are soldered, it is possible to prevent the insulating base member made of synthetic resin from being melted by heat during soldering.

  In the above configuration, the antenna device according to the present invention includes a third connection electrode connected to the second connection electrode on one surface of the antenna mounting substrate, a signal transmission cable, and the third connection electrode. The connection electrode and the core wire of the signal transmission cable are connected by solder, and the recess is formed such that the third connection electrode is separated from any surface of the insulating base member by a predetermined distance or more. Have

  In the antenna device configured as described above, the solder connection portion between the third connection electrode and the core wire of the signal transmission cable is separated from any surface of the insulating base member by a predetermined distance or more by the concave portion provided in the insulating base member. When the third connection electrode on the antenna mounting substrate and the core wire of the signal transmission cable are soldered, heat diffusion during soldering can be prevented and soldering can be facilitated. Further, it is possible to prevent the insulating base member made of synthetic resin from being melted by heat during soldering.

  Further, in the above-described configuration, in the antenna device of the present invention, the insulating base member is provided with an antenna substrate guide that holds both sides of the antenna substrate so as to be integrated with the insulating base member. Has characteristics.

  In the antenna device configured as described above, the antenna substrate can be disposed perpendicular to the antenna mounting substrate, and the antenna substrate can be stably supported.

  In the above configuration, the antenna device of the present invention has a case made of synthetic resin and having a shape of a ridge, and the antenna substrate and the antenna mounting substrate are covered with the case. It has the feature of being broken.

  The antenna device configured as described above can reduce wind noise caused by the antenna device when the antenna device is attached to the roof of the vehicle.

  Further, in the composite antenna device of the present invention, two antenna devices are provided at a predetermined distance between the antennas, and an antenna device shorter than the two antenna devices is provided between the two antenna devices. Has characteristics.

  The composite antenna device configured as described above is provided with two antenna devices separated by a predetermined distance between the antennas, and an antenna device having a shorter height than the two antenna devices is provided in a space generated by the predetermined distance between the antennas. Since it is provided, the space can be used effectively.

  In the antenna device of the present invention, the solder connection portion between the first connection electrode and the second connection electrode is separated from any surface of the insulating base member by a concave portion provided in the insulating base member. When the first connection electrode and the second connection electrode on the antenna mounting substrate are soldered, it is possible to prevent the insulating base member made of synthetic resin from being melted by heat during soldering.

1 is a perspective view showing an external appearance of an antenna device according to a first embodiment of the present invention. It is a perspective view which shows the relationship between the case of an antenna device, and the inside of an antenna device. It is a perspective view which shows the structure of an antenna device. It is a front view which shows the structure of an antenna device. It is a top view which shows the structure of an antenna device. It is sectional drawing which shows the structure of an antenna device. It is a perspective view which shows the external appearance of the composite antenna apparatus which concerns on 2nd Embodiment of this invention. It is a perspective view which shows the relationship between the case of a composite antenna apparatus, and several antenna apparatuses. It is a perspective view which shows the structure of the antenna apparatus used for a composite antenna apparatus. It is sectional drawing which shows the structure of the antenna device which concerns on a prior art example.

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

  First, the external shape of the antenna device 100 according to the first embodiment and the structure of main components will be described with reference to FIGS. 1 and 2.

  FIG. 1 is a perspective view showing an appearance of an antenna device 100 according to the first embodiment of the present invention, and FIG. 2 is a perspective view showing a relationship between a case 7 of the antenna device 100 and an internal configuration of the antenna device 100. It is.

  The antenna device 100 has a case 7 made of synthetic resin and having the shape of a ridge (shark fin shape). As shown in FIG. 1, the shark fin shape is a streamlined outer shape that becomes thinner toward the tip and has a curved side surface that is narrowed inward. The antenna device 100 is mounted and attached on the roof of a vehicle (not shown). With such a structure, when the antenna device 100 is attached to the roof of the vehicle, the wind noise generated by the antenna device 100 is reduced. can do. Moreover, the signal transmission cable 5 is attached to the antenna device 100 and is connected to an electronic device installed inside the vehicle so that a high-frequency signal can be transmitted to and from the electronic device.

  As shown in FIG. 2, an antenna substrate 1, an antenna mounting substrate 2, and an insulating base member 3 are housed inside the antenna device 100. Therefore, the antenna board 1 and the antenna mounting board 2 are covered with the case 7, and the inside of the antenna device 100 is protected from the external environment.

  Next, the configuration of the antenna device 100 will be described with reference to FIGS.

  3 is a perspective view illustrating the configuration of the antenna device 100, FIG. 4 is a front view illustrating the configuration of the antenna device 100, and FIG. 5 is a plan view illustrating the configuration of the antenna device 100. FIG. 6 is a cross-sectional view showing the structure of the antenna device 100 when viewed in the Y1 direction from the line AA shown in FIG. 3 to 6 show the antenna device 100 with the case 7 and the mounting screws for attaching the case 7 to the insulating base member 3 omitted.

  As shown in FIGS. 3 and 4, the antenna substrate 1 has an antenna element 1a made of a conductor on one surface (the surface on the Y2 side), and a desired high-frequency signal is transmitted depending on the shape of the antenna element 1a. It is configured to be able to transmit and / or receive. As shown in FIGS. 3 and 5, the antenna mounting substrate 2 is formed with a ground pattern 2a made of a conductor over substantially the entire one surface (the surface on the Z1 side). The ground pattern 2a functions as an antenna ground for operating the antenna element 1a as an antenna. The antenna substrate 1 is attached so as to be arranged perpendicular to the antenna attachment substrate 2. The insulating base member 3 is made of synthetic resin, and the antenna mounting substrate 2 is placed on one surface (the surface on the Z1 side) as shown in FIGS. 3 and 4. After the antenna mounting substrate 2 is placed on the insulating base member 3, as shown in FIG. 4, the antenna mounting substrate 2 is mounted on the insulating base member 3 by screwing mounting screws 8 into the screw holes 3e. The case 7 shown in FIG. 2 is placed on the insulating base member 3 by placing the case 7 on the insulating base member 3 and screwing a mounting screw (not shown) into the screw hole 3d shown in FIGS. Can be attached.

  As shown in FIGS. 4 and 5, a magnet 6 is attached to the inside of the surface of the insulating base member 3 on the Z2 side in contact with the outside. The magnet 6 is provided for attaching the antenna device 100 to the roof of the vehicle. By using the magnet 6, it is not necessary to provide a mounting hole for mounting the antenna device 100 in the roof of the vehicle.

  As shown in FIGS. 3 to 5, a cable mounting bracket 9 is provided on the antenna mounting board 2, and the signal transmission cable 5 is mounted on the antenna mounting board 2 by the cable mounting bracket 9. The signal transmission cable 5 is formed in a coaxial shape for high-frequency signal transmission, and the core wire 5a is exposed on the antenna mounting substrate 2 as shown in FIG.

  As shown in FIGS. 3 and 4, a first connection electrode 1b connected to the antenna element 1a is provided on one surface of the antenna substrate 1, and as shown in FIGS. Two connection electrodes 2 b are provided on one surface of the antenna mounting substrate 2. A third connection electrode 2c is also provided on one surface of the antenna mounting substrate 2, and the third connection electrode 2c is connected to the second connection electrode 2b. The second connection electrode 2b and the third connection electrode 2c are arranged at positions separated from the ground pattern 2a in the ground pattern 2a formed on one surface of the antenna mounting substrate 2. Therefore, a portion where no conductor exists between the second connection electrode 2b and the third connection electrode 2c and the ground pattern 2a is generated. Further, as shown in FIG. 4, a fourth connection electrode 1d is provided on one surface of the antenna substrate 1, and as shown in FIG. 5, a fifth connection electrode 2d is provided on one surface of the antenna mounting substrate 2. The antenna substrate 1 and the antenna mounting substrate 2 are connected by solder 4.

  As shown in FIGS. 3 to 5, the third connection electrode 2 c and the core wire 5 a of the signal transmission cable 5 are connected to the antenna mounting substrate 2 by solder 4. Similarly, the first connection electrode 1 b and the second connection electrode 2 b are connected by the solder 4. Therefore, the antenna element 1a formed on one surface of the antenna substrate 1 and the core wire 5a of the signal transmission cable 5 are connected. As a result, a high-frequency signal transmitted and / or received by the antenna element 1a is transmitted. The signal is transmitted to and from an electronic device (not shown) in the vehicle via the signal transmission cable 5.

  As shown in FIGS. 3 to 5, the antenna substrate guide 3 c is integrally provided with the insulating base member 3 on one surface (Z1 side surface) of the insulating base member 3. The antenna substrate guide 3c is configured to hold the antenna substrate 1 while sandwiching both surfaces of the antenna substrate 1. Moreover, as shown in FIG. 3 thru | or FIG. 5, the recessed part 3a and the recessed part 3b are provided in two places located in the approximate center of the insulating base member 3. FIG. The concave portion 3a is formed to the outside in the Y1 direction of the insulating base member 3 from the position where the antenna substrate 1 is attached, and in the Y2 direction, to the position beyond the position behind the third connection electrode 2c. Is formed. Further, the recess 3b is provided in the vicinity of the fourth connection electrode 1d and the fifth connection electrode 2d provided on one surface of the antenna substrate 1 and one surface of the antenna mounting substrate 2, respectively.

  One end 1c of the antenna substrate 1 is inserted into the recess 3a and the recess 3b via the antenna substrate guide 3c. As a result, the antenna substrate 1 is disposed perpendicular to the antenna mounting substrate 2. In addition, in order to make it easy to arrange | position the antenna board | substrate 1 perpendicularly | vertically with respect to the antenna attachment board | substrate 2 in the antenna attachment board | substrate 2, as shown in FIG. The slit portion 2e is provided.

  In order to show the state in which the antenna substrate 1 is inserted into the recess 3a and the recess 3b in an easy-to-understand manner, reference is made to the sectional view of FIG. It can be seen that while the antenna substrate 1 is supported by the antenna substrate guide 3c, one end portion 1c of the antenna substrate 1 is inserted into the slit portion 2e of the antenna mounting substrate 2, and further inserted into the recess 3a and the recess 3b. Thus, by providing the antenna substrate guide 3c and the slit portion 2e, the antenna substrate 1 can be disposed perpendicular to the antenna mounting substrate 2, and the antenna substrate 1 can be stably supported. it can.

  The recess 3 a is such that the first connection electrode 1 b on the antenna substrate 1 and the second connection electrode 2 b on the antenna mounting substrate 2 connected to each other by the solder 4 are separated from each other surface of the insulating base member 3 by a predetermined distance or more. The size is set so that. When soldering the first connection electrode 1b and the second connection electrode 2b, heat generated by soldering is transmitted to the first connection electrode 1b and the second connection electrode 2b. If the distance from the first connection electrode 1b or the second connection electrode 2b to the surface of the insulating base member 3 is short, the insulating base member 3 is formed of a synthetic resin that is weak against heat. There is a possibility that 3 is melted by the heat. However, in the antenna device 100 of the present invention, the concave portion 3a is formed such that the heat generated by soldering is not transmitted from the first connection electrode 1b or the second connection electrode 2b to any surface of the insulating base member 3. The width and depth are set. Similarly, for the recess 3b, the width and depth of the recess 3b are set such that the heat generated by soldering is not transmitted to any surface of the insulating base member 3.

  As shown in FIGS. 3 and 5, the recess 3a is further formed beyond the position behind the third connection electrode 2c in the Y2 direction. In other words, the width and depth of the recess 3a so that the third connection electrode 2c connected to the core wire 5a of the signal transmission cable 5 with the solder 4 is separated from any surface of the insulating base member 3 by a predetermined distance or more. Is formed.

  As described above, in the antenna device 100 of the present invention, the concave portion is formed such that the heat generated by soldering is not transmitted from the first connection electrode 1b or the second connection electrode 2b to any surface of the insulating base member 3. The width and depth of 3a are set. Accordingly, the solder connection portion between the first connection electrode 1b and the second connection electrode 2b is transmitted by a predetermined distance, that is, heat generated by soldering, from any surface of the insulating base member 3 by the recess 3a provided in the insulating base member 3. No more than a distance away. Therefore, when the first connection electrode 1b on the antenna substrate 1 and the second connection electrode 2b on the antenna mounting substrate 2 are soldered, the insulating base member 3 made of synthetic resin is melted by heat at the time of soldering. Can be prevented.

  Further, the solder connection portion between the third connection electrode 2 c and the core wire 5 a is separated from any surface of the insulating base member 3 by a predetermined distance or more by the recess 3 a provided in the insulating base member 3. Therefore, when the third connection electrode 2c on the antenna mounting substrate 2 and the core wire 5a of the signal transmission cable 5 are soldered, it is possible to prevent diffusion of heat at the time of soldering and facilitate soldering. . Further, it is possible to prevent the insulating base member 3 made of synthetic resin from being melted by heat during soldering.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to the drawings.

  FIG. 7 is a perspective view showing an appearance of the composite antenna device 200 according to the second embodiment of the present invention, and FIG. 8 is a case 17 of the composite antenna device 200 and a plurality of antenna devices (an antenna device 20 to an antenna) inside. It is a perspective view which shows the relationship with the apparatus 40). FIG. 9 is a perspective view showing the configuration of the antenna device 30 among the plurality of antenna devices used in the composite antenna device 200.

  As shown in FIG. 7, the composite antenna device 200 includes a case 17 that is formed of synthetic resin and has a shape in which two ridged ridge shapes (shark fin shapes) are connected. Both of the two shark fin shapes are streamlined external shapes that become thinner toward the tip and have curved side surfaces that are narrowed inward. The composite antenna device 200 is mounted and mounted on the roof of a vehicle (not shown).

  As shown in FIG. 8, the antenna device 20, the antenna device 30, and the antenna device 40 are accommodated in the composite antenna device 200. The antenna device 20 has the same structure as the inside of the antenna device 100 used in the antenna device 100, and is configured to transmit and / or receive a high-frequency signal. The antenna device 20 is connected to the vehicle via the signal transmission cable 25. A signal is transmitted to the internal electronic device. The conductor pattern of the antenna element 21a of the antenna substrate 21 provided in the antenna device 20 is provided facing outward (Y2 direction). The antenna device 40 has substantially the same structure as the antenna device 20 and is configured to transmit and / or receive high-frequency signals. A signal is transmitted to an electronic device in the vehicle via a signal transmission cable 45. Is transmitted. In addition, the conductor pattern of the antenna element 41a of the antenna substrate 41 provided in the antenna device 40 is provided outward (Y1 direction).

  As shown in FIG. 8, the antenna element 21a on the antenna substrate 21 and the antenna element 41a on the antenna substrate 41 are provided apart by a predetermined distance L between the antennas. For example, when the antenna element 21a and the antenna element 41a are used for MIMO (Multi Input Multi Output), the distance L is set to a distance that does not affect the performance of each other. Further, for example, when the antenna element 21a and the antenna element 41a are used for diversity reception, the distance L is set to a distance adapted to diversity reception. Note that the detailed configurations of the antenna device 20 and the antenna device 40 are the same as those in the antenna device 100, and thus the description thereof is omitted.

  As shown in FIG. 8, the antenna device 30 is provided between the antenna device 20 and the antenna device 40. The antenna device 30 has a shape that is shorter than the antenna device 20 or the antenna device 40. Therefore, the case 17 has a shark fin shape that can accommodate the tall antenna device 20 and the antenna device 40 on the Y1 side and the Y2 side, respectively, and a middle portion thereof is in a low valley state. It is formed into a shape.

  As shown in FIG. 9, the antenna device 30 mainly includes an antenna element 31, an antenna mounting substrate 32, an insulating base member 33, and a signal transmission cable 35.

  The insulating base member 33 is made of synthetic resin. As shown in FIG. 9, the antenna mounting substrate 32 is placed on one surface (the surface on the Z1 side), and the antenna mounting substrate 32 is insulated by the mounting screw 38. It is attached to the member 33. This structure is equivalent to the inside of the antenna device 100.

  The antenna device 30 has a structure in which the antenna element 31 is directly attached to the antenna attachment substrate 32 by solder (not shown) or the like without using the antenna substrate. The antenna element 31 is a planar antenna formed from a single metal plate, and is mainly used for GPS reception. The received high frequency signal is transmitted to an electronic device (not shown) in the vehicle via the signal transmission cable 35. Since the antenna element 31 is a planar antenna, the directivity thereof is substantially perpendicular to the surface of the antenna mounting substrate 32. Therefore, even if the antenna device 20 and the antenna device 40 are arranged on both sides like the antenna device 30, the performance is hardly affected.

  As described above, the composite antenna device 200 is provided with the antenna device 20 and the antenna device 40 separated by a predetermined distance L between the antennas, and between the antenna device 20 and the antenna device 40, the antenna device 20 and the antenna device 40 are separated from each other. Since the antenna device 30 having a low height is provided, the space can be used effectively.

  As described above, in the antenna device of the present invention, the solder connection portion between the first connection electrode and the second connection electrode is separated from any surface of the insulating base member by a predetermined distance or more by the recess provided in the insulating base member. Therefore, when the first connection electrode on the antenna substrate and the second connection electrode on the antenna mounting substrate are soldered, it is possible to prevent the insulating base member made of synthetic resin from being melted by heat during soldering. it can.

  This invention is not limited to description of said 1st Embodiment and 2nd Embodiment, It can change suitably in the aspect in which the effect is exhibited, and can be implemented.

DESCRIPTION OF SYMBOLS 1 Antenna board | substrate 1a Antenna element 1b 1st connection electrode 1c One end part 1d 4th connection electrode 2 Antenna mounting board | substrate 2a Ground pattern 2b 2nd connection electrode 2c 3rd connection electrode 2d 5th connection electrode 2e Slit part 3 Insulating base member 3a Recess 3b Recess 3c Antenna board guide 3d Screw hole 3e Screw hole 4 Solder 5 Signal transmission cable 6 Magnet 7 Case 8 Mounting screw 9 Cable mounting bracket 17 Case 20 Antenna apparatus 30 Antenna apparatus 31 Antenna element 32 Antenna mounting board 33 Insulating base member 35 Signal Transmission Cable 38 Mounting Screw 40 Antenna Device 100 Antenna Device 200 Compound Antenna Device

Claims (5)

An antenna substrate having an antenna element made of a conductor, an antenna mounting substrate having a ground pattern made of a conductor, and an insulating base member made of a synthetic resin on which the antenna mounting substrate is placed, An antenna device for transmitting and / or receiving high-frequency signals,
A first connection electrode connected to the antenna element is provided on one surface of the antenna substrate, and a second connection electrode is provided on one surface of the antenna mounting substrate;
The insulating base member is provided with a recess, and one end of the antenna substrate is inserted into the recess, and the antenna substrate is disposed perpendicular to the antenna mounting substrate,
The first connection electrode and the second connection electrode are connected by solder, and the first connection electrode and the second connection electrode are separated from each surface of the insulating base member by a predetermined distance or more. An antenna device characterized by that. A third connection electrode connected to the second connection electrode is provided on one surface of the antenna mounting substrate, and a signal transmission cable is provided.
The recess is formed so that the third connection electrode and the core wire of the signal transmission cable are connected by solder, and the third connection electrode is separated from any surface of the insulating base member by a predetermined distance or more. The antenna device according to claim 1, wherein:   3. The antenna base guide according to claim 1, wherein an antenna substrate guide that holds and holds both sides of the antenna substrate is provided integrally with the insulating base member. Antenna device.   A case having a shape of a ridge formed by a synthetic resin, wherein the antenna substrate and the antenna mounting substrate are covered with the case. 4. The antenna device according to any one of 3. Two antenna devices according to any one of claims 1 to 3 are provided apart from each other by a predetermined distance between the antenna devices, and an antenna device shorter than the two antenna devices is provided between the two antenna devices. A composite antenna device characterized by being provided.