JP2012227743A - Portable transceiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable transceiver in which deterioration of antenna performance is minimized when it is held by hand, while combining downsizing and simplification in the configuration of a portable transceiver and guarantee of antenna performance.SOLUTION: A first ground pattern 106 and a second ground pattern 201 are placed at a predetermined interval and connected electrically via a signal connection part 205. A feeding part 107 and a part (a feeding land 204) of the second ground pattern 201 are connected electrically via a feeding member 104. The feeding land 204 and the signal connection part 205 are placed at a predetermined distance, and the signal connection part 205 also serves as the short circuit part of a reverse F antenna having a second substrate 200 as a radiation element. Furthermore, a display section 101 is provided, and at least a part of the second substrate 200 is located closer to the display section 101 at least one half of a portable receiver 100 in the thickness direction.

Description

  The present invention relates to an antenna of a portable wireless device.

  Conventionally, as an antenna of this type of portable wireless device, there are antennas described in Patent Document 1, Patent Document 2, and Patent Document 3, for example. Patent Document 1 discloses a technique in which a signal transmission path of a speaker is shared by an antenna element, the apparatus is downsized, and the configuration is simplified. Japanese Patent Application Laid-Open No. 2004-228561 discloses a technique for miniaturizing the apparatus by using a sheet metal ground of a structure as a part of an antenna. Patent Document 3 discloses a technology that includes a connection cable formed on an FPC (Flexible Printed Circuit) substrate and an antenna unit formed integrally with the connection cable, and that can be processed in a compact and highly accurate manner.

JP 2006-24586 A JP 2008-1224797 A JP 2003-078320 A

  However, in the conventional configuration, it may be difficult to reduce the size and simplify the configuration of the portable wireless device and ensure the antenna performance.

  For example, in the case of Patent Document 1, a reactance element is separately required in order to share a signal transmission path between a high frequency band (antenna) and a low frequency band (speaker). In the case of Patent Document 2, a sheet metal gland is required as a structure. In the case of Patent Document 3, the loss increases depending on the length of the connection cable, and since the area of the radiating element that operates as an antenna and the ground is limited on the FPC board, the antenna has a narrow band and the radiation efficiency is low. Furthermore, a non-woven fabric or woven fabric subjected to metal plating is required.

  In any conventional technique, when the portable wireless device is held by hand, the antenna performance may be significantly deteriorated due to the close distance between the hand and the antenna element.

  The present invention provides a portable wireless device capable of reducing the size of the portable wireless device, simplifying the configuration and ensuring the antenna performance, and suppressing deterioration of the antenna performance when the portable wireless device is held by hand. The purpose is to do.

  In order to solve the above-mentioned conventional problems, a portable wireless device of the present invention includes a housing, a first substrate provided in the housing and having a first ground pattern, a second ground pattern and a circuit provided in the housing. A second substrate having a pattern; a power supply unit provided on the first substrate and electrically connected to a radio circuit; and a signal connection unit that connects the second ground pattern and the circuit pattern to the first substrate. The first ground pattern and the second ground pattern are arranged at a predetermined interval and are electrically connected via the signal connection portion, and the power feeding portion and the second ground pattern are Some are electrically connected via a power supply member. According to this portable wireless device, an antenna can be configured only by adding a power feeding member, and not only the second substrate but also the ground such as the first substrate contributes to radiation, thereby ensuring antenna performance.

  In the portable wireless device of the present invention, the power supply unit and the signal connection unit are disposed at a predetermined distance, and the signal connection unit also serves as a short-circuit unit of an inverted F antenna having the second substrate as a radiating element. Configure. According to this portable wireless device, an inverted F antenna can be realized with a small and simple configuration.

  The portable wireless device of the present invention is configured such that the power supply unit and the signal connection unit are spaced apart from each other, and the signal connection unit also serves as a short-circuit unit of a loop antenna having the second substrate as a radiating element. . According to this portable wireless device, a loop antenna can be realized with a small and simple configuration.

  In addition, the portable wireless device of the present invention includes a display unit, and at least a part of the second substrate is disposed closer to the display unit than half of the thickness direction of the portable wireless device. According to this portable wireless device, the distance between the hand and the second substrate can be secured when the portable wireless device is held by hand, and deterioration of the antenna performance when the portable wireless device is held by hand can be suppressed. .

  The portable wireless device of the present invention is a hard substrate or a flexible substrate that includes a key operation unit on the same surface as the display unit, and the second substrate detects a key operation. According to this portable wireless device, when the portable wireless device is held by hand, the distance between the hand and the second substrate is inevitably ensured, and deterioration of antenna performance when the portable wireless device is held by hand is suppressed. be able to.

  As described above, according to the portable wireless device of the present invention, the portable wireless device can be reduced in size and simplified in configuration and the antenna performance can be ensured, and the antenna performance can be degraded when the portable wireless device is held by hand. Can be suppressed.

1 is an external perspective view of a portable wireless device according to Embodiment 1 of the present invention. It is a conductor pattern figure of the 2nd board | substrate in Embodiment 1 of this invention, Fig.2 (a) is a surface (surface view), FIG.2 (b) is a back surface (surface view) pattern figure. 1 is an internal structure diagram of a portable wireless device according to Embodiment 1 of the present invention. FIG. 4A is a conductor pattern diagram of a second substrate in Embodiment 2 of the present invention, FIG. 4A is a pattern diagram of the front surface (front view), and FIG.

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

(Embodiment 1)
FIG. 1 is an external perspective view of portable wireless device 100 according to Embodiment 1 of the present invention. A portable wireless device 100 illustrated in FIG. 1 is, for example, a mobile phone terminal or a smartphone, and is equipped with a wireless communication function and an antenna.

  In the portable wireless device 100, the display unit 101 occupies most of the surface. In a smartphone, a touch panel is often formed on the surface of the display unit. In addition, key operation units 102 a, 102 b, and 102 c including a diaphragm are provided below the display unit 101 on the same surface as the display unit 101.

  2A and 2B are conductor pattern diagrams of the second substrate 200 according to Embodiment 1 of the present invention. FIG. 2A is a pattern diagram of the front surface (front view), and FIG. is there. The second substrate 200 shown in FIG. 2 is a substrate for detecting that any one of the key operation units 102a to 102c of the portable wireless device 100 is originally pressed, and is composed of, for example, a flexible substrate (FPC substrate). The The second substrate 200 may be a hard substrate and may be a substrate for realizing a function different from the antenna, and is used for detecting that any of the key operation units 102a to 102c is pressed. It is not limited to the substrate.

  The second ground pattern 201 occupies almost the entire surface of the second substrate 200 on both sides. 202a, 202b, and 202c are diaphragm-structure lands for detecting that the key operation units 102a, 102b, and 102c are pressed on the surface of the second substrate 200, respectively. Reference numeral 203 denotes a circuit pattern extending from the lands 202a to 202c for the diaphragm structure, and is configured by the front and back surfaces of the second substrate 200.

  Reference numeral 204 denotes a power feeding land provided on the back surface of the second substrate 200 in order to operate the second ground pattern 201 of the second substrate 200 as an antenna, and is a part of the second ground pattern 201. The second ground pattern 201 and the circuit pattern 203 extend toward the signal connection unit 205 in order to be connected to a substrate different from the second substrate 200.

  The resist is not applied to the lands 202a to 202c for the diaphragm structure, the power supply land 204, and the second ground pattern and circuit pattern in the vicinity of the signal connection portion 205. Further, the second ground pattern 201 is configured to cover the circuit pattern 203 in the vicinity of the signal connection portion 205, that is, the width of the second ground pattern 201 is set to be thicker than the width of the circuit pattern 203. Yes.

  FIG. 3 is an internal structure diagram of portable wireless device 100 according to Embodiment 1 of the present invention.

  The first substrate 103 is a substrate in which the first ground pattern 106 is provided on almost the entire surface. A wireless communication module, a CPU (Central Processing Unit), and the like (not shown) are mounted on the first substrate 103. Occupies an area. Inside the casing of the key operation units 102a to 102c, the second substrate 200 is incorporated so that the key operation units 102a to 102c face the diaphragm structure lands 202a to 202c. The power supply mounted on the surface of the first substrate 103 by soldering to a power supply unit (land) 107 connected to an antenna terminal of a wireless communication module (not shown) via a wiring pattern in the first substrate 103 or a coaxial cable. The member 104 is disposed.

  The power supply member 104 is an electrically conductive member having elasticity, and the power supply land 204 of the second substrate 200 and the power supply unit 107 of the first substrate 103 face each other and are electrically connected via the power supply member 104 (or electromagnetic field). Integrated into the housing. At this time, at least a part of the first substrate 103 and the second substrate 200 is arranged substantially in parallel.

  Further, the connector 105 is mounted on the back surface of the first substrate 103 by soldering, the signal connection portion 205 of the second substrate 200 is connected, and the second ground pattern 201 of the second substrate 200 is connected to the first substrate 103. By connecting to the first ground pattern 106 and the circuit pattern 203 of the second substrate 200 to a CPU (not shown), it is possible to detect pressing of the key operation units 102a to 102c.

  With the above configuration, the signal connection unit 205 of the second substrate 200 also serves as a short-circuited portion of the inverted F antenna that uses the second substrate 200 as a radiating element for realizing a function different from that of the antenna. Thus, the antenna can be configured in a small and simple manner, and not only the second substrate 200 but also the first ground pattern 106 of the first substrate 103 having a large area contributes to radiation, thereby ensuring the antenna performance. .

  In addition, wide band antenna characteristics can be obtained by setting the width of the second ground pattern 201 near the signal connection unit 205. At this time, at least a part of the second ground pattern 201 is separated from the first ground pattern 106 and other grounds by a predetermined distance (for example, 5 mm or more), and the power feeding unit 107 of the first substrate 103 (for power feeding of the second substrate 200). A higher antenna performance is ensured by disposing the land 204) at a predetermined distance from the signal connection unit 205 (connector 105) according to the frequency band of wireless communication using the land 204).

  In addition, although the case where the signal connection part 205 of the 2nd board | substrate 200 was connected to the connector 105 of the 1st board | substrate 103 was described, it is a case where the signal connection part 205 is connected to the connector mounted on the 3rd board | substrate. Even in such a case, the same effect can be obtained if the first substrate 103 and the ground of the third substrate are connected via a metallic chassis or the like that occupies a large area in the portable wireless device 100.

  Further, the second substrate 200 is an FPC substrate, and as shown in FIG. 3, at least a part of the second substrate 200 is disposed closer to the display unit 101 than half of the thickness direction of the portable wireless device 100. In particular, in the case where the original function is that the second substrate 200 detects that the key operation units 102a to 102c are pressed, at least a part of the second substrate 200 is necessarily more than half the thickness direction of the portable wireless device 100. Is also arranged closer to the display unit 101.

  With the above configuration, when the portable wireless device 100 is held by hand, the palm is close to the back surface of the portable wireless device 100, but the distance between the palm and the second substrate 200 can be secured, and the portable wireless device 100 is held by hand. It is possible to suppress the deterioration of the antenna performance at the time.

(Embodiment 2)
4A and 4B are conductor pattern diagrams of the second substrate according to Embodiment 2 of the present invention. FIG. 4A is a pattern diagram of the front surface (front view), and FIG. 4B is a pattern diagram of the back surface (front view). . 4, the same components as those in FIG. 2 are denoted by the same reference numerals, and description thereof is omitted.

  In the present embodiment, on the second substrate 300, the power feeding land 301 is disposed away from the signal connection portion 205 (connector 105). Correspondingly, the mounting position of the power supply member 104 is changed, and the outer shape of the first substrate 103 is changed as necessary.

  With the above configuration, the signal connection portion 205 of the second substrate 300 also serves as a short-circuit portion of the loop antenna that uses the second substrate 300 for realizing a function different from that of the antenna as a radiating element. The effect is obtained.

  It is possible to achieve both miniaturization and simplification of the configuration of the portable radio and ensuring the antenna performance, and suppress deterioration of the antenna performance when the portable radio is held by hand. Useful for.

DESCRIPTION OF SYMBOLS 100 Portable radio | wireless machine 101 Display part 102a, 102b, 102c Key operation part 103 1st board | substrate 104 Feeding member 105 Connector 106 1st ground pattern 107 Feeding part 200,300 2nd board | substrate 201 2nd ground pattern 202a, 202b, 202c Diaphragm structure Land 203 Circuit pattern 204, 301 Power feeding land 205 Signal connection

Claims (5)

A housing,
A first substrate provided in the housing and having a first ground pattern;
A second substrate provided in the housing and having a second ground pattern and a circuit pattern;
A power feeding unit provided on the first substrate and electrically connected to a wireless circuit;
A signal connecting portion for connecting the second ground pattern and the circuit pattern to the first substrate;
Comprising
The first ground pattern and the second ground pattern are arranged at a predetermined interval and are electrically connected via the signal connection portion,
The portable wireless device, wherein the power feeding unit and a part of the second ground pattern are electrically connected via a power feeding member. The power feeding unit and the signal connection unit are arranged at a predetermined distance, and the signal connection unit also serves as a short-circuit unit of an inverted F antenna having the second substrate as a radiating element. Portable radio. 2. The mobile radio according to claim 1, wherein the power supply unit and the signal connection unit are spaced apart from each other, and the signal connection unit also serves as a short-circuit unit of a loop antenna having the second substrate as a radiating element. Machine. The portable wireless device including a display unit, wherein at least a part of the second substrate is disposed closer to the display unit than half of the thickness direction of the portable wireless device. The portable wireless device according to any one of 3 above. The portable wireless device having a key operation unit on the same surface as the display unit, wherein the second substrate is a hard substrate or a flexible substrate for detecting a key operation. Item 5. A portable wireless device according to any one of Items 4 to 6.

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