JP2605088Y2 - transceiver - Google Patents

Description

[Detailed description of the invention]

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio device having an antenna, and more particularly to an improvement in ensuring directivity of an antenna.

[0003]

2. Description of the Related Art Conventional radios are usually provided with either an omnidirectional antenna or a directional antenna.

[0004]

A radio device equipped with an omnidirectional antenna has a uniform circular directivity of output and / or input, so that it can be used in a wide area with few obstacles. Can uniformly receive radio waves in all directions and / or receive radio waves from all directions uniformly, and there is no problem.

However, when used in places with many obstacles such as mountains and large buildings, the places with obstacles cannot be used as places where calls can be made, and the range in which communications can be performed is substantially reduced. Problems arise. On the other hand, a radio equipped with a directional antenna can communicate with a greater distance in a direction that matches the directivity of the output and / or input. However, since the directivity is strong, there is a problem that communication is performed only in a specific direction and the communication range cannot be widely covered.

In order to solve these problems, it is conceivable that an omnidirectional antenna and a directional antenna are provided, and these are appropriately selected and used. However, this causes a problem that the number of components increases, the manufacturing becomes complicated, and the work of replacing the omnidirectional antenna and the directional antenna becomes complicated. In particular, in a radio having a limited output, the device itself is small, and it is desirable that the antenna has a simpler structure. The problem becomes more serious when the structure of the antenna is complicated.

The present invention has been made in view of the above circumstances, and it is possible to use an omnidirectional antenna and a directional antenna as appropriate for output or / and input directivity. An object of the present invention is to provide a wireless device in which the structure of the antenna is simpler, and the work of manufacturing and replacing the omnidirectional antenna and the directional antenna is simple.

[0008]

According to the present invention, an omnidirectional antenna is attached to a device main body, and an antenna member forming a directional antenna together with the omnidirectional antenna is detachable from the device main body. This is a radio device configured to selectively use a directional antenna and a non-directional antenna by attaching and detaching such an antenna member to and from a device body.

The detailed configuration is as follows: a device main body in which a transmitting means and a receiving means are provided; an omnidirectional antenna attached to the device main body; When mounted on the device body, together with the omnidirectional antenna, an antenna member for configuring a directional antenna is provided, and the omnidirectional antenna functions as a radiator by the omnidirectional antenna. A director and a reflector for forming a directional antenna, a frame for holding and fixing the director and the reflector in a predetermined positional relationship, and a frame integrated with the frame and held and fixed to the frame The antenna member is mounted on the top surface of the device main body, and the waveguide member and the reflector are formed of a plate material capable of fixing the director and the reflector in a predetermined posture to the top surface of the device main body. The through hole is provided with a female screw hole on the top surface of the device main body, and a screw is screwed into the female screw hole of the device main body from above through a through hole of the plate material and fixed. is there. Here, the antenna refers to a transmitting antenna and / or a receiving antenna.

[0010]

The omnidirectional antenna functions as an omnidirectional antenna when the antenna member is detached from the device body, and forms a directional antenna together with the antenna member when the antenna member is mounted on the device body. .

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the embodiments shown in FIGS. However, the present invention is not limited by the embodiment.

As shown in FIGS. 1 and 2, the wireless device 1 includes a device main body 2, an omnidirectional transmitting antenna 3 and a receiving antenna 4, and an antenna member 5. The device main body 2 internally includes a transmitting means (not shown) having a transmission frequency band of 380 MHz and a receiving means (not shown) having a receiving frequency band of 254 MHz. The device main body 2 has an operation panel 6 on the front surface. The microphone 7 is connected to the device main body 2 by a cord.

The omnidirectional transmitting antenna 3 and the receiving antenna 4 are both rod-shaped, and are attached vertically upward from the top surface of the device body 2. The transmitting antenna 3 and the receiving antenna 4 are 390 mm and 560 mm in length, respectively. The antenna member 5 includes a frame 8,
A plate 9, a transmission unit director 11 and a transmission unit reflector 12,
It mainly comprises a receiving unit director 14 and a receiving unit reflector 15. The frame 8 is made of a round rod-shaped insulating material, and holds and fixes the transmitter waveguide 11, the transmitter reflector 12, the receiver waveguide 14, and the receiver reflector 15 in a predetermined positional relationship. .

The plate member 9 is for attaching and fixing the frame 8 to the device main body 2 in a predetermined posture. That is,
The plate member 9 mounts and fixes the frame 8 to the device main body 2 in a predetermined posture, thereby receiving the transmitting part director 11 and the transmitting part reflector 12 with respect to the transmitting antenna 3 and receiving with respect to the receiving antenna 4. Part director 14 and receiving part reflector 15
Are held in a predetermined positional relationship and in a predetermined posture, respectively. When the antenna member 5 is attached to the device main body 2, a through hole (not shown) is formed on a surface of the plate member 9 which is in contact with the top surface of the device main body 2, and a female screw hole (not shown) is formed on the top surface of the device main body 2. (Not shown), and a screw (not shown) is screwed into the female screw hole of the device body 2 through the through hole of the plate member 9 from above to be fixed (FIG. 2).
See). The transmission unit director 11 and the transmission unit reflector 12
When the frame 8 is fixedly attached to the device main body 2 in a predetermined state, it forms a directional transmission antenna 10 together with the transmission antenna 3. Transmitter director 11
And the transmitter reflector 12 are 340 mm and 420 mm in length, respectively. Further, the antenna member 5 is connected to the device main body 2.
When it is fixed and fixed to the transmitter, the transmitter director 1
1 and transmission antenna 3 and transmission antenna 3
And the distance between the transmitter reflector 12 is 155 mm
And 100 mm.

Receiving unit director 14 and receiving unit reflector 15
When the frame 8 is attached and fixed to the device body 2 in a predetermined state, the directional receiving antenna 13 is configured together with the receiving antenna 4. Each of the receiver waveguide 14 and the receiver reflector 15 has a length of 500 mm.
And 620 mm. Further, when the frame 8 is fixedly attached to the device main body 2 in a predetermined manner, the distance between the receiving unit director 14 and the receiving antenna 4 and the distance between the receiving antenna 4 and the receiving unit reflector 15 are respectively 220mm and 1
60 mm.

The wireless device 1 is configured as described above. Therefore, when the wireless device 1 is used in a wide place such as a flat ground, as shown in FIG. 1, the wireless device 1 is used with the antenna member 5 removed. Here, radio 1
, When transmitting, the omnidirectional transmitting antenna 3
The radio wave is transmitted via the antenna, and the radio wave is received via the non-directional receiving antenna 4 at the time of reception. That is, the wireless device 1
Since the output and input directivities are uniform in a circular shape, radio waves can be transmitted uniformly in all directions and radio waves from all directions can be received uniformly.

On the other hand, when the wireless device 1 is used in a place with many obstacles such as a mountain or a large building group, the communication range is substantially narrow and limited. Then, as shown in FIG. 2, the antenna member 5 is attached to the device main body 2. Here, the omnidirectional transmitting antenna 3 is the directional transmitting antenna 10 together with the transmitting unit director 11 and the transmitting unit reflector 12, and the omnidirectional receiving antenna 4 is the receiving unit director 14 and The directional receiving antenna 13 is configured together with the receiver reflector 15.

Therefore, the radio device 1 is configured such that the directional transmission antenna 10 includes the omni-directional transmission antenna 3 so that the directional transmission antenna 3 When replacing the antenna 10 with the antenna 10, the omnidirectional transmission antenna 3 does not need to be removed, and the antenna member 5 is simply attached to the device main body 2, so that the handling is simplified. In addition, the radio device 1 requires a smaller number of members as compared to the case where the omnidirectional antenna and the directional antenna are individually manufactured, since the number of members is shared, the cost is low, and the manufacturing is simplified. I have.

In the wireless device 1, the directional transmission antenna 10 is composed of the transmission unit director 11 and the transmission unit reflector 12, and the transmission unit director 11 and the transmission antenna 3. Spacing distance, transmitting antenna 3 and transmitting unit reflector 12
Is a value experimentally obtained so that the strength can obtain a desired directivity based on the length of the transmitting antenna 3 and corresponding to the transmitting frequency band. In addition, in the wireless device 1, the same effect is obtained by configuring the directional receiving antenna 13 in the same manner as described above. Similarly to the transmitting antenna 10, each element of the directional receiving antenna 13 is designed based on a value experimentally determined so as to obtain a desired directivity with the strength corresponding to the receiving frequency band. Have been.

In the wireless device 1, the present invention is used for the directional transmitting antenna 10 and the receiving antenna 13, but the present invention may be applied to either the transmitting or receiving antenna.

[0021]

[Effects of the Invention] This invention is based on the fact that an omnidirectional antenna is configured to be a part of a directional antenna.
When the omnidirectional antenna and the directional antenna are selectively used as appropriate, the exchange from the omnidirectional antenna to the directional antenna can be easily performed, and the number of parts is reduced due to the simpler structure of the antenna. It is a radio that requires less and is therefore easier to manufacture.

[Brief description of the drawings]

FIG. 1 is a perspective view when an omnidirectional antenna according to an embodiment of the present invention is used.

FIG. 2 is a perspective view when the directional antenna of the embodiment shown in FIG. 1 is used.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 wireless device 2 main body 3 omnidirectional transmitting antenna 4 omnidirectional receiving antenna 5 antenna member 8 frame 10 directional transmitting antenna 11 transmitting unit director 12 transmitting unit reflector 13 directional receiving Antenna 14 Receiver waveguide 15 Receiver reflector

Claims (1)

(57) [Scope of request for utility model registration] An apparatus main body in which a transmitting means and a receiving means are internally provided, an omnidirectional antenna attached to the apparatus main body, and further detachable from the apparatus main body and attached to the apparatus main body. In this case, an antenna member for constituting a directional antenna is provided together with the omnidirectional antenna, and the omnidirectional antenna operates as a radiator to provide a directional antenna. And a frame for holding and fixing the director and the reflector in a predetermined positional relationship, and a director integrated with the frame and held and fixed to the frame. The antenna member is attached to the device main body by fixing a reflector to the top surface of the device main body in a predetermined posture, and the antenna member is attached to the device main body by a through hole formed on a surface of the plate material that is in contact with the top surface of the device main body. ,machine Top female screw holes are respectively provided on the body, radios, characterized in that it is fixed is screwed into the internal thread hole of the main body of the screw from above through the through hole of the plate material.