JPH01160101A - antenna device - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Industrial applications The present invention relates to an antenna device used in a radio device.

2. Prior Art FIGS. 2(3) and 2(b) each show the configuration of a conventional antenna device. As shown in FIGS. 2(a) and 2(b), a rod-shaped antenna element 23 protrudes from a housing 22 of a radio main body 21 and is supported so as to be retractable. A wireless circuit section 24 and a connection terminal 25 electrically connected to the wireless circuit section 24 are provided within the housing 22 .

Next, the operation of the above conventional example will be explained.

When the antenna element 23 is made to protrude from the radio main body 21 as shown in FIG. It is connected to the wireless circuit section 24. On the contrary, when the antenna element 23 is housed in the radio main body 21 as shown in FIG.
3 is connected to the wireless circuit section 24 via the connection terminal 25.

In this way, even in the above-mentioned conventional antenna device, the antenna element 23
Since the connecting terminals 23a and 23b at the base and tip are selectively brought into contact with the connecting terminal 26 at the protruding position and the retracted position of the antenna element 23, even when the antenna element 23 is stored in the radio main body 21, Can be used as an aerial.

Problems to be Solved by the Invention However, in the above-mentioned conventional antenna device, when the antenna element 23 is housed in the radio main body 21, the antenna element 23 is affected by the housing 21 and the radio circuit section 24, resulting in misalignment. This causes problems such as a decrease in antenna gain and abnormal operation of internal circuits.

The present invention solves such conventional problems, and aims to prevent mismatching of the antenna element when the antenna element is housed in the main body of the radio.

Therefore, it is an object of the present invention to provide an antenna device that can alleviate the decrease in antenna gain and prevent abnormal operation of internal circuits.

Means for Solving the Problems In order to achieve the above object, the present invention includes a rod-shaped antenna element that protrudes from the radio main body and is supported so that it can be stored, and a matching circuit dedicated to when the antenna element is stored in the radio main body. and a connecting terminal, and when the antenna element is stored in the main body of the radio, the antenna element is connected to a matching circuit dedicated to the storing via the connecting terminal.

Effects The present invention has the following effects due to the above structure. That is, by connecting the antenna element to a dedicated matching circuit via a connection terminal when the antenna element is housed in the radio main body, mismatches that occur when the antenna element is affected by the radio circuit section, etc. can be alleviated. Can be done.

Examples Examples of the present invention will be described below. Figure 1(a)
, (b) show an antenna device according to an embodiment of the present invention, FIG. 1(a) is a partially cutaway schematic diagram of the antenna element in a protruding state, and FIG. It is a partially broken schematic diagram.

As shown in FIGS. 1(a) and 1(b), a rod-shaped antenna element 3 protrudes from a housing 2 of a radio main body 1 and is supported so as to be retractable. Inside the housing 2 is a wireless circuit section 4;
A connection terminal 5 electrically connected to is provided. When the antenna element 3 is protruding from the radio body 1, the connection terminal 3a at its base contacts the connection terminal 5, and when it is housed in the radio body 1, the connection terminal 3b at the tip contacts the connection terminal 6. be able to. A matching circuit 6 dedicated to storing the antenna element and a connection terminal 7 electrically connected to the matching circuit 6 are provided in the housing 2, and when the antenna element 3 is stored in the radio main body 1, its base The connecting terminal 3a is brought into contact with the connecting terminal 7.

Next, the operation of the above embodiment will be explained.

The antenna element 3 is attached to the radio main body 1 as shown in FIG. 1(a).
If it is made to protrude further, the connection terminal 3a at the base of the antenna element 30
contacts the connection terminal 6, and the antenna element 3 is connected to the radio circuit section 4 via the connection terminal 5.

Conversely, when the antenna element 3 is housed in the radio main body 1 as shown in FIG. 1(b), the connection terminal 3b at the tip of the antenna element 3 contacts the connection terminal 6, and the antenna element 3 It is connected to the wireless circuit section 4 via the terminal 6. At the same time, the connection terminal 3a at the base of the antenna element 30 comes into contact with the connection terminal 7, and the antenna element 3 is connected to the matching circuit 6 via the connection terminal.

In this way, according to the above embodiment, when the antenna element 3 is housed in the radio main body 1, it is connected to the dedicated matching circuit 6 via the connection terminal 7, so that the antenna element 3 is protected from the influence of the radio circuit section 4, etc. This has the advantage of being able to correct the resulting mismatch, alleviating the decrease in antenna gain, and preventing abnormal operation of internal circuits.

Effects of the Invention As described above, according to the present invention, a rod-shaped antenna element is protruded from the main body of a radio device and supported in a manner that it can be stored, and a matching circuit and a connection terminal exclusively used when the antenna device is stored are provided in the main body of the radio device. When the antenna element is stored in the radio main body, the antenna element is connected to the matching circuit dedicated to the storage via the connection terminal, so that mismatching that occurs when the antenna element is stored in the radio main body is avoided. can be corrected, the decrease in antenna gain can be alleviated, and abnormal operation of internal circuits can be prevented.

[Brief explanation of the drawing]

1(a) and 1(b) show an antenna device according to an embodiment of the present invention, FIG. 1(a) is a partially cutaway schematic diagram of the antenna element in a protruding state, and FIG. 1(b) is a partially cutaway schematic diagram of the antenna 2(a) and 2(b) show a conventional antenna device, and FIG. 2(a) is a partially cutaway schematic view of the antenna element in a protruding state. Figure (b) is a partially cutaway schematic diagram of the antenna element in a stored state. DESCRIPTION OF SYMBOLS 1...Radio device main body, 2...Housing, 3...Antenna element, 4...Radio circuit section, 6...Connection terminal, 6...
Matching circuit dedicated to storing the antenna element, 7...connection terminal. Name of agent: Patent attorney Toshio Nakao and 1 other person-1
〜 恢 −

Claims (1)

[Claims] A rod-shaped antenna element is protruded from the main body of the radio and is supported so as to be retractable, and a matching circuit and a connection terminal dedicated for when the antenna element is stored are provided in the main body of the radio, and when the antenna element is stored in the main body of the radio, this antenna An antenna device characterized in that the element is configured to be connected to the matching circuit dedicated for storage through the connection terminal.