JP2005268899A - Antenna mounting structure of mobile communication apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an antenna mounting structure of a mobile communication apparatus for reducing the cable loss of an antenna cable and reducing the influence of electric noise, or the like generated from a component packaged on a substrate inside a communication apparatus body. <P>SOLUTION: The formation surface of an antenna pattern 11 of a built-in antenna substrate 10 is composed so as to be arranged opposite to the component packaging surface of a substrate 32 inside the body, thus relatively separating the distance between the antenna pattern 11 and the substrate 32 inside the body by the thickness of a dielectric that is the substrate of built-in antenna substrate 10, and shielding the influence of electric noise from packaged components on the substrate 32 inside the body by a dielectric that is the substrate of the built-in antenna substrate 10. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an antenna mounting structure for a portable communication device provided with a built-in antenna substrate, such as a portable wireless device, a cellular phone, a cordless phone, and a transceiver.

  In the conventional antenna mounting structure of a portable radio device, as shown in FIG. 4, a whip antenna 100 is used as a built-in antenna, and the whip antenna 100 is screwed inside the casing (case) of the portable radio device main body 300. The antenna connector mounted on the main body internal board 200 in which the antenna connector 102 attached to the tip of the RF cable 101 of the whip antenna 100 is fixed inside the radio main body after being fixed using a locking means by a fitting claw. By fitting into 201, the electrical connection between whip antenna 100 and main body internal substrate 200 is established.

  However, when a whip antenna is used, the structure of the radio main body is simplified and downsized because it is structurally limited. Further, since the RF cable 101 is used for electrical connection between the whip antenna 100 and the main body internal substrate 200, there is a problem that the wireless characteristics are deteriorated due to the cable loss of the RF cable 101.

  Therefore, as shown in FIG. 5, the antenna pattern 401 is directly formed on a part of the main body internal substrate 400 disposed inside the wireless device main body by printing, and the antenna and the main body internal substrate are integrated, so that wireless communication due to cable loss is achieved. It is devised to prevent the deterioration of characteristics.

  However, in such a configuration, since the antenna pattern is printed directly on the main body internal substrate 400, if there is a difference between the antenna characteristics at the time of desktop design and the antenna characteristics in the actual machine at the time of trial manufacture, solder or the like is used. Although it is possible to urgently correct the pattern, it is impossible to change the pattern itself without redesigning the substrate.

  Further, as the size of the radio main body is reduced as in the case of a portable radio device in recent years, a sufficient distance between the mounting component on the main body internal substrate 400 and the antenna pattern 401 cannot be secured, and electricity generated from the mounting component can be prevented. There is a problem that the antenna characteristics deteriorate due to the influence of noise and the like.

  Therefore, in a conventional antenna mounting structure for a portable communication device equipped with a built-in antenna element, a flat flat antenna element as a built-in antenna element is formed in a flat recess formed on the outer surface of the communication device body, The communication device body is housed between a decorative plate that covers the flat recess, and a communication hole for internal conduction is formed in the communication device main body, and a connector for electrically conducting the circuit board is disposed in the communication hole. ing. (For example, refer to Patent Document 1).

JP 2000-209014 A

  However, in such a configuration, in order to incorporate the antenna element, it is necessary to provide the communication device main body with a flat recess and a communication hole for internal conduction, and the shape of the communication device main body becomes complicated. . In addition, a decorative plate for covering the flat concave portion is necessary, and there is a problem that the number of parts increases.

  The present invention has been made in view of the above circumstances, and can reduce the cable loss of an antenna cable and reduce the influence of electrical noise and the like emitted from components mounted on a communication device main body internal board. It is an object of the present invention to provide an antenna mounting structure for a portable communication device capable of performing the above.

  Therefore, in the present invention, in the antenna mounting structure of the portable communication device provided with the built-in antenna substrate, the built-in antenna substrate is installed facing the communication device main body internal substrate, and further, the antenna pattern forming surface of the built-in antenna substrate Is arranged so as to be located on the opposite side to the component mounting surface of the communication device main body internal board.

  By arranging the antenna pattern formation surface of the built-in antenna board on the opposite side to the component mounting surface of the communication device internal board, electrical generated from the components mounted on the communication equipment internal board This has the effect of reducing the influence of noise and the like.

  Embodiments of the present invention will be described with reference to the drawings.

  The antenna mounting structure of the portable communication device having the built-in antenna substrate of the present invention is configured such that the built-in antenna substrate faces the internal substrate of the communication device main body, and the antenna pattern forming surface of the built-in antenna substrate is the communication device main body. By disposing the internal board so as to be located on the opposite side with respect to the component mounting surface, it is possible to reduce the influence of electrical noise and the like emitted from the components mounted on the communication apparatus main body internal board.

First, a first embodiment of the present invention will be described in detail with reference to FIG. Here, the portable communication device is a so-called portable wireless device, and FIG. 1 is a diagram showing an antenna mounting structure of the portable wireless device according to the first embodiment of the present invention, and FIG. FIG. 1B is a detailed view of the built-in antenna substrate, and FIG. 1B is a view showing a structure inside the portable wireless device main body.
As shown in FIG. 1A, the built-in antenna substrate 10 has an antenna pattern 11 on one side and a terminal connection pad 12 on the opposite side by printing on a dielectric substrate. The antenna pattern 11 and the terminal connection pad 12 are electrically connected inside the dielectric.

Further, as shown in FIG. 1B, the built-in antenna substrate 10 has a double-sided tape, an adhesive, Alternatively, it is fixed using a locking means with a fitting claw. At the time of assembling the portable radio main body 30, when the front case 31 was fitted into the rear case (not shown), the terminal connection pads 12 of the built-in antenna substrate 10 were mounted on the main body internal substrate 32 attached to the rear case. By contacting the spring probe connector 33, the built-in antenna substrate 10 and the main body internal substrate 32 can be electrically connected. Although the spring probe type connector 33 is used here for electrical continuity, a pressure contact type connector may be used instead.

Thus, in the present invention, even if the portable wireless device main body 30 is thinned, the surface on which the antenna pattern 11 of the built-in antenna substrate 10 is formed is positioned opposite to the component mounting surface of the main body internal substrate 32. Therefore, the distance between the antenna pattern 11 and the main body internal substrate 32 can be relatively increased by the thickness of the dielectric that is the base of the built-in antenna substrate 10. The influence of electrical noise from the mounted components can be shielded by the dielectric that is the base of the built-in antenna substrate 10.

  Next, a second embodiment of the present invention will be described in detail with reference to FIG. FIG. 2 is a diagram showing an antenna mounting structure of a portable wireless device according to the second embodiment of the present invention, and FIG. 2A is a perspective view showing an internal structure of the portable wireless device main body. 2 (b) is an arrow view from the direction A in FIG. 2 (a).

Here, as shown in FIG. 2, only the electrical connection method between the built-in antenna substrate 10 and the main body internal substrate 32 is different from that of the first embodiment. The built-in antenna substrate 10 has an antenna pattern (upper surface in the figure) formed on one surface, and a conductive terminal 13 having a spring contact terminal made of metal on the surface opposite to the antenna pattern. In addition, the antenna pattern and the soldering pads (not shown) of the conductive terminals 13 are electrically connected inside the dielectric that is the base.

  On the other hand, a terminal contact pad 34 for contacting the contact terminal of the conductive terminal 13 of the built-in antenna substrate 10 is provided on the main body internal substrate 32 of the portable radio device main body 30. At the time of assembly, when the front case is fitted to the rear case, the contact terminal of the conductive terminal 13 of the built-in antenna substrate 10 fixed to the front case becomes the terminal contact pad 34 of the main body internal substrate 32 attached to the rear case. By abutting, the built-in antenna substrate 10 and the main body internal substrate 32 are electrically connected.

Accordingly, as in the first embodiment, the antenna pattern 11 forming surface of the built-in antenna substrate 10 is arranged so as to be located on the opposite side of the component mounting surface of the main body internal substrate 32. Therefore, the distance between the antenna pattern 11 and the main body internal substrate 32 can be relatively increased by the thickness of the dielectric that is the base of the built-in antenna substrate 10, and the influence of electrical noise from components on the main body internal substrate 32 can be achieved. Can be shielded by a dielectric that is a base of the built-in antenna substrate 10.

  Next, a third embodiment of the present invention will be described in detail with reference to FIG. FIG. 3 is a diagram showing an antenna mounting structure of a portable wireless device according to the third embodiment of the present invention, and FIG. 3A is a perspective view showing the structure inside the portable wireless device main body. 3 (b) is an arrow view from the direction B in FIG. 3 (a).

Here, as shown in FIG. 3, the terminal portion 14 for soldering to the internal body substrate 32 is provided on the built-in antenna substrate 10. In addition, the body internal substrate 32 is provided with a through hole 35 for soldering after the terminal portion 14 of the built-in antenna substrate 10 is fitted.

  When the main body internal substrate 32 is assembled, the terminal portion 14 of the internal antenna substrate 10 is inserted into the through hole 35 formed on the main body internal substrate 32, and then the joint surface is soldered, whereby the internal antenna substrate 10 and the main body internal substrate 32 are electrically connected. Here, as shown in FIG. 3, the built-in antenna substrate 10 is attached so that the printed surface of the antenna pattern 11 faces the opposite side (outside) with respect to the component mounting portion of the main body internal substrate 32.

  Accordingly, since the antenna pattern 11 forming surface of the built-in antenna substrate 10 is arranged on the opposite side to the component mounting portion of the main body internal substrate 32, the thickness of the dielectric that is the base of the built-in antenna substrate 10 is increased. The distance between the antenna pattern 11 and the main body internal substrate 32 can be relatively increased, and the influence of electrical noise from components on the main body internal substrate 32 is shielded by the dielectric that is the base of the built-in antenna substrate 10. be able to.

It is a figure which shows the antenna attachment structure of the portable radio | wireless machine which concerns on the 1st Embodiment of this invention, Fig.1 (a) is detail drawing of a built-in antenna board | substrate, FIG.1 (b) is portable radio | wireless machine. It is a figure which shows the structure inside a main body. It is a figure which shows the antenna attachment structure of the portable radio | wireless machine which concerns on the 2nd Embodiment of this invention, Fig.2 (a) is a perspective view which shows the structure inside a portable radio | wireless machine main body, FIG.2 (b) These are arrow line views from the A direction in Fig.2 (a). It is a figure which shows the antenna attachment structure of the portable radio | wireless machine which concerns on the 3rd Embodiment of this invention, Fig.3 (a) is a perspective view which shows the structure inside a portable radio | wireless machine main body, FIG.3 (b) These are arrow line views from the B direction in Fig.3 (a). It is a figure which shows the antenna mounting structure of the conventional portable radio | wireless machine. It is a figure which shows the antenna mounting structure of the conventional portable radio | wireless machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Built-in antenna substrate, 11 ... Antenna pattern, 12 ... Terminal connection pad, 13 ... Conductive terminal, 14 ... Terminal part,
30 ... Portable radio main unit 31 ... Front case 32 ... Body internal substrate 33 ... Connector 34 ... Pad for contact with terminals 35 ... Through hole,
100: Whip antenna 101: RF cable 102: Antenna connector
200 ... Main body internal substrate, 201 ... Antenna connector,
300 ... portable radio body,
400: Internal substrate of the main body 401: Antenna pattern

Claims (1)

In the antenna mounting structure of a portable communication device provided with a built-in antenna substrate, the built-in antenna substrate is installed facing the communication device body internal substrate, and the antenna pattern forming surface of the built-in antenna substrate is the communication device body internal substrate. An antenna mounting structure for a portable communication device, wherein the antenna mounting structure is disposed on the opposite side of the component mounting surface.

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