JP2005347912A - Antenna substrate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an antenna substrate by which a wireless module can constantly maintain an optimum antenna gain without displacement of an antenna mounted in a state that an optimum communication range can be provided to the antenna substrate, and also, efficient wireless communication can be executed. <P>SOLUTION: The antenna substrate 10 has an antenna 20 in which the antenna 22 is mounted on a substrate, and a mounting part 30 constituting a circuit on the substrate. The antenna 20 and the mounting part 30 are individually provided. The antenna 20 and the mounting part 30 are electrically connected by a flexible substrate 40. The antenna substrate 10 is provided with an angle holding means 80 for holding an inclination angle made by the antenna 20 and the mounting part 30. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an antenna substrate disposed in a wireless module. More specifically, in a communication device using a wireless module, the antenna communication range is optimized regardless of the installation state of the antenna substrate in the wireless module. The present invention relates to an antenna substrate that can be used.

A chip antenna is a typical antenna used by attaching to a wireless module. This chip antenna has directivity, and a large difference occurs in the communicable range depending on the antenna arrangement direction with respect to the radio wave direction. Moreover, the output amount of an antenna used for wireless communication in Japan is limited by the Radio Law. In particular, the output amount of the antenna for weak wireless communication is regulated to a very small output amount. Therefore, it is desired that the antenna of the antenna substrate used by being attached to the wireless module is always provided in a state in which the communicable distance is maximized.
In recent years, an antenna that can adjust the installation angle of the antenna part of the antenna board to an arbitrary angle according to the use state of the wireless module by electrically connecting the mounting part of the antenna board and the antenna part by a flexible board. The structure is disclosed in Patent Document 1.
JP 2004-111563 A

In the invention described in Patent Document 1, since the antenna attached to the wireless module can be set to an arbitrary angle, even if the antenna attached to the antenna substrate is a directional antenna such as a chip antenna, the wireless module is arranged. Enables efficient wireless communication regardless of the installation direction.
However, no measures are taken to maintain the state where the antenna installation angle is set with respect to the antenna board, and the antenna board is incorporated into the wireless module in a state where the antenna installation angle is different from the initial setting angle. There was a problem that there is a risk of losing.

  According to the present invention, the wireless module always maintains the optimum antenna gain and the efficient wireless communication is possible without shifting the antenna attached in a state where the optimum communication range can be provided with respect to the antenna substrate. The purpose is to provide an antenna substrate.

  The present invention provides an antenna substrate having an antenna portion on which an antenna is mounted on a substrate and a mounting portion that constitutes a circuit on the substrate, wherein the antenna portion and the mounting portion are provided separately, and the antenna portion and the mounting portion are provided. The antenna board is characterized in that an angle holding means for holding an inclination angle between the antenna part and the mounting part is provided.

  According to another aspect of the present invention, in an antenna substrate in which an antenna portion on which an antenna is formed and a mounting portion that is electrically connected to the antenna portion are provided separately, at the boundary between the antenna portion and the mounting portion. A bending portion for connecting the antenna portion and the mounting portion so as to be bendable, an angle holding means for holding an inclination angle between the antenna portion and the mounting portion, and electrically connecting the antenna portion and the mounting portion. The antenna substrate is provided with a flexible substrate to be connected.

  Furthermore, the angle holding means is a fixed pin attached to an edge portion on the mounting portion side of the antenna portion. Thereby, an antenna part can be easily fixed to a mounting board.

The bent portion may be a groove formed in the antenna substrate. As a result, the antenna substrate can be easily bent.
Further, the bent portion is provided with a through-hole penetrating in the thickness direction of the antenna substrate, and the fixing pin is accommodated in a region of the through-hole. Thereby, in the state before bending an antenna board | substrate, planarity is maintained and the storage in a space saving is attained.

  Further, the angle holding means can be bent at an arbitrary angle. Thus, the antenna substrate can be provided in a state where the gain of the antenna mounted on the antenna unit is always maximized.

  According to the antenna substrate of the present invention, the antenna gain can always be maintained in an optimum state in accordance with the installation state of the wireless module in the wireless communication device. Communication is possible.

  Hereinafter, embodiments of an antenna substrate will be described with reference to the drawings.

  FIG. 1 is a plan view of an antenna substrate according to the first embodiment. FIG. 2 is a side view of the antenna substrate according to the first embodiment. FIG. 3 is a front view illustrating a state where the antenna substrate is attached to the mounting substrate of the wireless module. FIG. 4 is a side view showing a state in which the inclination angle of the antenna unit with respect to the wiring unit is adjusted.

  The antenna substrate 10 according to the present embodiment is provided in a state in which the substrate body is formed of a resin substrate, the antenna portion 20 on which the chip antenna 22 is mounted, and the mounting portion 30 on which the circuit component 32 is formed are separated from each other. It has been. The chip antenna 22 is attached to the antenna unit 20 by a known method such as adhesive or soldering.

  Electrical connection between the antenna unit 20 and the mounting unit 30 is made through a flexible substrate 40 provided in the inner layer of the antenna substrate 10.

  As shown in FIG. 1, the antenna unit 20 and the mounting unit 30 are connected to each other at both boundary portions 70 in the width direction of the antenna substrate 10 at the boundary position, and groove portions 50 as bent portions are formed at both end portions 70. . An opening 60 that opens in a rectangular shape from the boundary position between the antenna portion 20 and the mounting portion 30 toward the mounting portion 30 is provided in the middle of the bent portion.

The openings 60 are formed on both sides of the flexible substrate 40. In the opening portion 60, a fixing pin 80 is attached by soldering to a pad 82 provided at one end of the antenna portion 20 on the mounting portion 30 side of the antenna portion 20 so as to extend toward the mounting portion 30. Has been.
Since the fixing pin 80 is formed of a metal piece such as mild steel, the fixing pin 80 is plastically deformed by bending the fixing pin 80, and can be bent at a required angle at a midway portion.

Next, a method for attaching the antenna substrate 10 will be described.
First, as shown in FIG. 3, the antenna substrate 10 is bent at the groove portion 50 which is a bent portion, and the antenna portion 20 is inclined with respect to the mounting portion 30 at an angle at which the gain of the chip antenna 22 is maximized. The fixing pin 80 attached to the antenna unit 20 is inserted into the fixing hole KH of the mounting substrate K, and the antenna unit 20 is fixedly supported in a state where the inclination angle with respect to the mounting unit 30 is maintained.

  When the antenna unit 20 is inclined with respect to the mounting unit 30, the fixing pin 80 attached to the antenna unit 20 rotates together with the antenna unit 20 with the bent portion serving as a fulcrum, and has the same inclination angle as the antenna unit 20. In this state, since the tip of the fixing pin 80 protrudes from the opening 60, the tip of the protruding fixing pin 80 may be inserted into a fixing hole KH provided in the mounting substrate K and fixed by soldering or the like.

  In the case where the gain of the chip antenna 22 is maximized at an angle other than a right angle with respect to the surface of the mounting portion 30, as shown in FIG. What is necessary is just to insert the front-end | tip part of the pin 80 in the fixing hole KH of the mounting substrate K, and to fix and support it as mentioned above. In addition, after the distal end portion of the fixing pin 80 is inserted and fixed in the fixing hole KH of the mounting substrate K, the antenna unit 20 is rotated to have a predetermined inclination angle, and the fixing pin 80 is bent to a predetermined angle. You can also. As described above, the antenna substrate 10 is always provided in a state where the gain of the chip antenna 22 is maximized.

  FIG. 5 is a plan view of the antenna substrate according to the second embodiment. FIG. 6 is a plan view of a mounting substrate to which the antenna substrate is attached. FIG. 7 is a perspective view showing a state in which the antenna substrate is attached to the mounting substrate. In addition, in a present Example, detailed description is abbreviate | omitted by attaching | subjecting the same member number about the same member as Example 1. FIG.

The antenna portion 20 and the mounting portion 30 of the antenna substrate 10 are formed separately on the resin substrate. The antenna unit 20 and the mounting unit 30 are electrically connected by a flexible substrate 40. The method for mounting the chip antenna 22 on the antenna unit 20 and the method for forming the circuit component 32 on the mounting unit 30 are known methods as in the first embodiment.
In the antenna unit 20, a slit 24 is formed from one side edge of the antenna unit 20 toward the center of the antenna unit 20. The width W <b> 1 of the slit 24 substantially matches the substrate thickness of the mounting substrate 90.

  The mounting substrate 90 to which the antenna substrate 10 is attached has a slit 96 formed from the other side edge of the mounting substrate 90 toward the center of the mounting substrate 90. The width W <b> 2 of the slit 96 substantially matches the substrate thickness of the antenna substrate 10, and the length L of the slit 96 is formed longer than the substrate width KL of the antenna substrate 10.

  As shown in FIG. 7, the antenna substrate 10 is attached to the mounting substrate 90 by aligning the slit 24 of the antenna unit 20 and the slit 96 of the mounting substrate 90 and mounting the mounting substrate 90 on the slit 24 formed in the wiring substrate 20. The board portion of the antenna unit 20 is inserted into the slit 96, and the antenna unit 20 and the mounting board 90 are maintained in a fitted state by being combined with each other.

The antenna unit 20 attached by the method described above maintains a plane orthogonal to the plane of the mounting substrate 90. On the other hand, the mounting portion 30 connected via the flexible substrate 40 is disposed in parallel with the lower surface of the mounting substrate 90 and attached to the lower surface of the mounting substrate 90 by soldering or the like. The antenna unit 20 and the mounting unit 30 are electrically connected by a flexible substrate 40.
As shown in FIG. 7, it is preferable to provide a stopper 98 for preventing detachment at the edge of the wiring substrate 10 attached to the mounting substrate 90 or to fix the fitting portion by soldering or the like. In the antenna substrate 10 in the first and second embodiments, the directivity can be improved by arranging the antenna unit 20 upright with respect to the mounting unit 30 according to the installation direction of the antenna substrate 10. .

In the above embodiments, the chip antenna 22 is used as an antenna. However, the present invention can be applied to antennas other than the chip antenna 22 as long as directivity is an issue. Of course.
Further, the antenna wiring board 10 may be formed by simply separating the antenna unit 20 and the mounting unit 30 in advance as shown in FIG. In such a form, the flexible substrate 40 becomes a bent portion. In this case, the angle holding means of the antenna unit 20 may be any form of the fixing pin 80 described in the first embodiment and the slit 24 described in the second embodiment.

  Moreover, in the said Example, although the form in which the fixing pin 80 was attached to the antenna part 20 was each demonstrated as an angle holding means of the antenna part 20, instead of using the fixing pin 80, the antenna part 20's After disposing the chip antenna 22 at a required angle, a post-attachment stay 100 as shown in FIG. 9 is transferred to the antenna unit 20 and the mounting unit 30 or a member to be attached to the antenna unit 20, and a known adhesive or the like is used. It is also possible to adopt an angle holding means that is mounted by a method. The post stay 100 is preferably a metal plate such as mild steel that can be easily plastically deformed.

  Furthermore, the antenna substrate 10 according to the present invention can widen the communicable range of the wireless communication device by adjusting the installation angle of the antenna unit 20 with respect to the mounting unit 30 according to the arrangement direction of the antenna substrate 10. Since it is possible, it is needless to say that the inclination angle between the antenna unit 20 and the mounting unit 30 is not limited to the perpendicular direction, and may be set at an inclination angle as shown in FIG.

  Further, in the above-described embodiments, the form in which the fixing pin 80 is accommodated in the region of the opening 60 has been described. At the same time, it is only necessary to be attached so as to be rotatable, and it is not always necessary to be accommodated in the region of the opening 60. As another attachment position of the fixing pin 80, it can also be set as the form attached to the side edge and lower surface of the antenna part 20, for example.

2 is a plan view of an antenna substrate in Example 1. FIG. 3 is a side view of an antenna substrate in Example 1. FIG. It is a side view which shows the state which attached the antenna board | substrate in Example 1 to the mounting board | substrate of a wireless module. It is a side view which shows the state which adjusted the inclination-angle of the antenna part with respect to a wiring part. 7 is a plan view of an antenna substrate in Example 2. FIG. FIG. 6 is a plan view of a mounting board in Example 2. It is a perspective view which shows the state which attached the antenna board | substrate to the terminal block. It is a top view which shows an example of other embodiment of an antenna wiring board. It is a perspective view which shows an example of other embodiment of an angle holding | maintenance means.

Explanation of symbols

10 antenna substrate 20 antenna portion 22 chip antenna 24 slit 30 mounting portion 32 circuit component 40 flexible substrate 50 groove portion 60 opening portion 70 both ends 80 fixing pin 90 mounting substrate 96 slit 98 stopper 100 stay K mounting substrate KH fixing hole

Claims (6)

An antenna portion having an antenna mounted on a substrate;
In an antenna substrate having a mounting part that constitutes a circuit on the substrate,
The antenna part and the mounting part are provided separately, and the antenna part and the mounting part are electrically connected by a flexible substrate,
An antenna substrate characterized in that angle holding means for holding an inclination angle between the antenna portion and the mounting portion is provided. In an antenna substrate provided with an antenna part formed with an antenna and a mounting part electrically connected to the antenna part,
At the boundary between the antenna portion and the mounting portion, a bending portion that connects the antenna portion and the mounting portion so as to be bent is provided,
Angle holding means for holding an inclination angle between the antenna portion and the mounting portion;
The antenna board | substrate characterized by the above-mentioned. The flexible substrate which electrically connects the said antenna part and the said mounting part is provided.   The antenna substrate according to claim 1 or 2, wherein the angle holding means is a fixing pin attached to an end edge portion on the mounting portion side of the antenna portion.   4. The antenna substrate according to claim 2, wherein the bent portion is a groove formed in the antenna substrate.   The through hole penetrating in the thickness direction of the antenna substrate is disposed in the bent portion, and the fixing pin is housed in the region of the through hole. The antenna substrate described.   The antenna substrate according to claim 1, wherein the angle holding unit is freely bendable at an arbitrary angle.

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