JP3992368B2 - Radio selective call receiver - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a radio selective call receiver that can receive signals using both a loop antenna and an externally mounted antenna, and particularly, allows a large opening area of the loop antenna to be obtained.
[0002]
[Prior art]
The radio selective call receiver is usually miniaturized because it is carried and used, and a loop antenna that can be built into the receiver is often used as an antenna of this receiver. In order to achieve high reception performance with this loop antenna, it is necessary to make the opening area of the loop antenna as large as possible.
[0003]
In general, a loop antenna has an antenna gain that is reduced due to the influence of a proximity object, particularly a metal object, and the reception performance of the loop antenna is deteriorated. Therefore, it is necessary to avoid disposing parts or the like in the vicinity of the loop antenna.
[0004]
Conventionally, in this radio selective call receiver, an externally attached antenna is connected as required, and reception is possible with both the built-in loop antenna and externally attached antenna.
[0005]
As shown in the perspective view of FIG. 4A and the top view of FIG. 4B, this type of radio selective calling receiver includes a loop antenna element 11 fixed to one end of a substrate 15, and a loop antenna element 11. Are connected to the circuit of the substrate 15, and an externally mounted antenna connector 12 fixed to the end of the substrate 15 along with the loop antenna element 11, and this externally mounted antenna connector 12 is provided. Further, the externally mounted antenna 13 is connected via the connector 17 and the cable 14.
[0006]
In this radio selective calling receiver, the connector 12, the loop antenna element 11, and the connection portion 16 are arranged so as to be spaced apart from each other so that the loop antenna element 11 is not affected by the connector 12.
[0007]
[Problems to be solved by the invention]
However, in the conventional radio selective call receiver, since the externally mounted antenna connector 12 is arranged outside the opening of the loop antenna 11, the opening area of the loop antenna 11 must be reduced by this connector 12. Therefore, there is a problem that the gain of the loop antenna 11 is reduced and the reception performance of the loop antenna 11 is deteriorated.
[0008]
The present invention solves such a conventional problem, and provides a radio selective call receiver in which a connection portion of an externally mounted antenna is arranged so that an opening area of a loop antenna can be increased. It is aimed.
[0009]
[Means for Solving the Problems]
Therefore, in the radio selective call receiver of the present invention, the externally attached antenna connection portion is arranged in the opening of the loop antenna, on the vertical line of the opening surface, or between the loop antenna and the receiver. It arrange | positions behind the connection part with a board | substrate.
[0010]
Therefore, even if there is a connection portion for an externally mounted antenna, the opening area of the loop antenna can be increased, and high reception performance of the loop antenna can be realized.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
According to the first aspect of the present invention, in the radio selective call receiver having a loop antenna and an externally attached antenna connection part, the externally attached antenna connection part is disposed in the opening of the loop antenna. Thus, the externally attached antenna connection portion can be arranged without reducing the opening area of the loop antenna, and the high reception performance of the loop antenna can be realized.
[0012]
According to the second aspect of the present invention, the connection portion for the externally mounted antenna is disposed at a position away from the connection portion between the loop antenna and the substrate of the receiver, and the opening area of the loop antenna is increased. While maintaining, the influence of the proximity of the loop antenna can be reduced.
[0013]
According to a third aspect of the present invention, there is provided a radio selective call receiver comprising a loop antenna and an externally attached antenna connection portion, wherein the externally attached antenna is located at a position away from an opening surface on a vertical line with respect to the opening surface of the loop antenna. For example, the opening area of the loop antenna can be increased, and the influence of the proximity of the loop antenna can be reduced.
[0014]
According to a fourth aspect of the present invention, there is provided a radio selective calling receiver including a loop antenna and an externally attached antenna connection portion, wherein the loop selective antenna is a line parallel to a vertical line with respect to the opening surface of the loop antenna and the loop antenna. The connection part for the externally mounted antenna is arranged on the extension of the line passing through the connection part between the loop antenna and the receiver board, and the connection for the externally mounted antenna is made behind the connection part between the loop antenna and the receiver board. By arranging the portions, the opening area of the loop antenna can be increased.
[0015]
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0016]
(First embodiment)
As shown in the perspective view of FIG. 1A and the top view of FIG. 1B, the radio selective call receiver of the first embodiment includes a loop antenna element 11 fixed to one end of a substrate 15, a loop It has a connection portion 16 for connecting the antenna element 11 to the circuit of the substrate 15, and an externally mounted antenna connector 12 fixed to the end of the substrate 15 in the opening of the loop antenna element 11. An externally mounted antenna 13 is connected to the mounted antenna connector 12 via a connector 17 and a cable 14.
[0017]
In this radio selective call receiver, the externally attached antenna connector 12 is disposed at a position spaced apart from the connecting portion 16 in the opening of the loop antenna element 11. The distance between the connecting portion 16 and the externally mounted antenna connector 12 is preferably 4 mm or more.
[0018]
Thus, by arranging the externally mounted antenna connector 12 in the opening of the loop antenna 11, the opening area of the loop antenna 11 can be enlarged. In addition, since the externally mounted antenna connector 12 is arranged at a distance from the connection portion 16 between the loop antenna 11 and the substrate 15 that significantly affects the antenna characteristics, it is not affected by the proximity of the loop antenna 11. Can be reduced. Therefore, with this configuration, the gain of the loop antenna 11 can be increased.
[0019]
In this embodiment, the externally mounted antenna 13 is connected to the circuit of the substrate 15 using the externally mounted antenna connector 12, but the cable 14 and the substrate 15 connected to the externally mounted antenna 13 Alternatively, the externally mounted antenna 13 and the substrate 15 may be connected by other connection methods such as direct attachment with solder.
[0020]
(Second Embodiment)
As shown in the perspective view of FIG. 2A and the top view of FIG. 2B, the radio selective call receiver according to the second embodiment has an externally mounted antenna connector 12 and an opening of the loop antenna element 11. It is arranged at a position on the substrate 15 away from the part. The size of the opening of the loop antenna element 11 is the same as that of the first embodiment, and the externally mounted antenna connector 12 is located on a vertical line with respect to the opening surface of the loop antenna element 11.
[0021]
The externally mounted antenna 13 is connected to the circuit of the substrate 15 by passing the cable 14 through the opening of the loop antenna element 11 and connecting the connector 17 to the externally mounted antenna connector 12.
[0022]
In this radio selective call receiver, the externally mounted antenna connector 12 is arranged on the vertical line to the opening surface of the loop antenna element 11, so that the opening area of the loop antenna can be increased, and the externally mounted antenna The antenna connector 12 can be arranged away from the loop antenna element 11 and the connection portion 16. Therefore, the gain of the loop antenna can be increased with almost no influence from the connecting portion 16.
[0023]
In this embodiment, the cable 14 is passed through the opening of the loop antenna element 11 and the connector 17 is connected to the externally mounted antenna connector 12. However, the cable 14 is connected to the left or right of the opening of the loop antenna element 11 or opposite to the opening. It may be pulled out from any direction such as the side.
[0024]
Further, for connection between the externally mounted antenna 13 and the circuit of the substrate 15, other connection methods such as directly attaching the cable 14 connected to the externally mounted antenna 13 and the substrate 15 with solder may be used.
[0025]
(Third embodiment)
In the radio selective call receiver of the third embodiment, as shown in the perspective view of FIG. 3A and the top view of FIG. 3B, an opening of the loop antenna element 11 of the substrate 15 is provided. As viewed from the end face, the externally mounted antenna connector 12 is disposed at a position where it hits the rear of the connecting portion 16. The size of the opening of the loop antenna element 11 is the same as that of the first embodiment. The externally mounted antenna 13 is connected to the externally mounted antenna connector 12 via the connector 17 and the cable 14 from the side of the end surface orthogonal to the end surface of the substrate 15 where the opening of the loop antenna element 11 is provided. is doing.
[0026]
In this radio selective call receiver, since the externally attached antenna connector 12 is arranged behind the connection portion 16 at a distance from the connection portion 16, the opening area of the loop antenna 15 can be enlarged. Further, the influence of the proximity object of the loop antenna 11 can be reduced. Therefore, the gain of the loop antenna can be increased with almost no influence from the connecting portion 16.
[0027]
In this embodiment, the connection surface of the externally mounted antenna connector 12 with the connector 17 faces the direction orthogonal to the opening surface of the loop antenna element 11, but this connection surface faces in any direction. Alternatively, the externally mounted antenna 13 may be connected from any direction.
[0028]
Further, for connection between the externally mounted antenna 13 and the circuit of the substrate 15, other connection methods such as directly attaching the cable 14 connected to the externally mounted antenna 13 and the substrate 15 with solder may be used.
[0029]
【The invention's effect】
As is clear from the above description, the radio selective call receiver according to the present invention can provide a wide opening area of the loop antenna while arranging the connection portion for the externally mounted antenna in the housing having a limited size. High reception performance with a loop antenna can be realized.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a radio selective call receiver according to a first embodiment of the present invention;
FIG. 2 is a configuration diagram of a radio selective call receiver in the second embodiment of the present invention;
FIG. 3 is a configuration diagram of a radio selective call receiver according to a third embodiment of the present invention;
FIG. 4 is a configuration diagram of a conventional radio selective call receiver.
[Explanation of symbols]
11 Loop antenna element
12 Externally mounted antenna connector
13 Externally mounted antenna
14 External mounting antenna connection cable
15 Board
16 Connection between loop antenna element and substrate
17 Connection cable side connector for externally mounted antenna

Claims (4)

In a radio selective call receiver comprising a loop antenna and a connection part for an externally mounted antenna,
A radio selective call receiver, wherein the externally attached antenna connection portion is disposed in an opening of the loop antenna. 2. The radio selective call receiver according to claim 1, wherein the externally attached antenna connecting portion is disposed at a position spaced apart from a connecting portion between the loop antenna and the receiver substrate. In a radio selective call receiver comprising a loop antenna and a connection part for an externally mounted antenna,
The radio selective call receiver, wherein the externally attached antenna connection portion is disposed at a position away from the opening surface on a vertical line with respect to the opening surface of the loop antenna. In a radio selective call receiver comprising a loop antenna and a connection part for an externally mounted antenna,
The connection portion for the externally mounted antenna is disposed on a line extending parallel to a vertical line with respect to the opening surface of the loop antenna and passing through a connection portion between the loop antenna and the substrate of the receiver. A radio selective call receiver characterized by that.

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