JPH08195618A - Antenna structure of portable electronic equipment - Google Patents

Abstract

PURPOSE: To easily maintain the pitch between loops and the shape of an antenna by using loops as antenna bodies and connecting those loops by a connection substrate where a conductive pattern is formed. CONSTITUTION: The substrate 2d is formed of a glass-epoxy resin material and the conductive pattern 2b which electrically connects adjacent loops is patterned on the top surface of the substrate 2d; and connections are made from the start point 2aa of a connection hole part 2a to a feeding point 2c and from the end point 2ab to the feeding point 2c through a reverse-surface side conductive pattern 2e. Further, an electronic component 9 is mounted on the conductive pattern 2b. A current fed from the feeding point 2ca makes a round of the leftmost loop plate 1 through the start point 2aa and flows to a loop plate 1 of one side through the conductive pattern 2b. Similarly, a current having made one round of the rightmost loop plate 1 returns to the feeding point 2cb through the end point 2ab and the reverse-surface side conductive pattern 2e. In this case, the pitch between the loops 1 of the antenna 10 is determined by the intervals of connection parts 2a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna structure of a portable electronic device having a transmitting / receiving function.

[0002]

2. Description of the Related Art In recent years, the development of small electronic devices utilizing radio waves is remarkable, and by receiving the radio waves, the radio waves are calculated and displayed on the display unit, or similarly, the radio waves are transmitted and received to correct the time. Small electronic devices appeared,
It has been commercialized in many fields. An antenna is indispensable for transmitting and receiving radio waves, and its structure and size affect the transmission and reception performance, so it is convenient for a product such as built-in type, telescopic type, cord type, etc. A method of maintaining sex is adopted.

By the way, as an antenna structure, a loop antenna or the like is used for high frequency radio waves, but changes in performance and characteristics due to the influence of the human body when used near the human body, and especially in the case of small electronic equipment, portability is easy. It is important to consider the structure and size of the antenna that are suitable for Fig. 7 is a new version of wireless engineering I transmission edition published by April 30, 1964 (written by Shintaro Uda, Maruzen Co., Ltd.) 308P Fig. 10.1 (a),
It is a basic block diagram of the loop antenna described in (b). Reference numeral 16 is a conductive wire, and 17 is a feeding point.
The conductive wire 16 is bent into a circular shape or a rectangular shape to form an antenna body, and the end portion of the conductive wire 16 is diffracted to become a feeding point 17. In this case, a two-turn loop antenna is shown.

In order to improve the performance of the loop antenna, there is a method of increasing the opening area of the antenna body or increasing the number of turns of the antenna body, but in the case of portable electronic equipment, the opening area cannot be increased unnecessarily. Therefore, FIG. 8 shows a perspective view of a loop antenna in which the number of turns is increased to 4 turns.
Reference numeral 21 is a conductive wire, and 22 is a feeding point. The conductive wire 21 is bent into a substantially square shape to form an antenna body, and the end of the conductive wire 21 is diffracted to become a feeding point 22.

[0005]

However, when the conductive wire 21 itself is flexible to some extent, the pitch between the loops of the antenna body is preserved as the number of turns increases, and distortion of the shape is prevented to preserve the antenna shape. Becomes difficult.
If the conductive wire 21 itself is strong, it is difficult to shape it. In addition, it is difficult to dispose the electronic component on the conductive wire 21 before and after forming the antenna.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide an antenna structure in which the pitch and shape between loops are stable and electronic parts can be arranged on the antenna body.

[0007]

The structure of the present invention for achieving the above object comprises a loop formed of a conductive plate,
A connection board, an electronic component mounted on the connection board,
It is characterized in that it is configured by a connecting portion with the electronic device body configured on the connection board.

The loop is formed by bending a linear conductor.

Further, the loop is characterized in that a linear conductor is attached to and fixed to an antenna core.

The loop is inserted along a groove inside the case of the electronic device.

[0011]

That is, in the antenna structure according to the present invention, a loop is used as the antenna body, and the loop is connected by the connection board on which the conductive pattern is formed, so that the pitch between the loops in the loop antenna having a plurality of turns is preserved, The antenna shape can be easily saved, and electronic parts can be mounted on the loop.

[0012]

Embodiments of the present invention will be described in detail below with reference to the drawings.
1 is a perspective view showing a completed state of an antenna according to a first embodiment of the present invention, and FIG. 2 is a side view of a loop plate,
FIG. 3 is a top view of the connection board. In the figure, 1 is a loop plate, 1a is a connecting portion, 1b is a loop portion, 1c is a groove, and 1d.
Is a notch. The loop portion 1b is formed in a substantially rectangular shape, and a cutout portion 1d is formed in a part thereof. At both ends of the cutout portion 1d, projecting connecting portions 1a are provided, and on the loop portion 1b side of the connecting portion 1a, grooves 1c for arranging the connecting substrate 2 are formed. The loop plate 1 is formed by etching or pressing a conductive flat plate. The connection portion 1a is inserted into the connection board 2 described later. Although the loop portion 1b has a rectangular shape in this embodiment, it may have a circular shape or another polygonal shape. The cutout portion 1d is located on the long side, but it may be located on the short side.

Reference numeral 2 is a connection board, 2a is a connection hole, and 2a is a connection hole.
Reference numeral b is a conductive pattern, 2c is a feeding point, 2d is a substrate, and 2e is a lower surface side conductive pattern. The board 2d is made of glass epoxy material, and a conductive pattern 2b for conducting adjacent loops is patterned on the upper surface of the board 2d.
Feed point 2c from ab via lower surface side conductive pattern 2e
Connected to Further, the electronic component 9 is mounted on the conductive pattern 2b.

FIG. 1 shows the completed state, and the feeding point 2c.
The electric current supplied from a passes through 2aa and the leftmost loop plate 1
And goes to the loop plate 1 on the right side through the conductive pattern 2b. Similarly, the current that goes around the rightmost pattern 1 passes through the end point 2ab, passes through the lower surface side conductive pattern 2e, and returns to the feeding point 2cb. The conductive pattern 2b also contributes to the antenna function as a part of the loop plate 1. In this embodiment, the current flows clockwise from the left loop to the right loop, but the direction in which the current flows, the order of the loops, etc. can be changed depending on the patterning of the conductive pattern 2b. The electronic component 9 may be mounted anywhere on the connection board 2.

Next, a procedure for assembling the antenna 10 shown in FIG. 1 will be described. Insert the connection part 1a into the connection hole part 2a and solder,
Alternatively, a conductive adhesive is used to fix the conductive pattern 2
It has continuity with b. Antenna 10 depending on the number of loops 1
The number of turns of is determined. In the case of this embodiment, four loops 1 are used. The antenna 1 depends on the distance between the connecting portions 2a.
The pitch between 0 and loop 1 is determined. Further, the connection board 2 can be arranged at a position lower than the upper surface of the loop plate 1 by the groove 1c. Hereinafter, the case of four turns will be described as an example.

In this embodiment, by using the loop plate 1, the shape of the antenna is preserved after the loop plate 1 is connected to the connection board 2. The electronic component 9 in which the pitch between the loops is held by the distance between the connection hole portions 2a
The effect is that it can be placed on top.

FIG. 4 is a perspective view showing a second embodiment of the present invention. The difference from the embodiment of FIG. 1 is that it has an antenna configuration using conductive wires. Reference numeral 3 is a loop wire formed by bending a conductive wire, and forms a 4-turn loop antenna structure as a whole, similar to the antenna using the loop plate 1 described above. The assembling procedure of the second embodiment is the same as that of the first embodiment, so the explanation is omitted. According to this configuration,
Since the loop wire 3 is formed only by bending the conductive wire, there is an effect that the material, wire diameter, and loop shape of the conductive wire can be easily changed.

FIG. 6 is a top view showing a state where the antenna is incorporated in an electronic device. 5 is an electronic device, 6 is a case, 7
Is a loop insertion groove, and 8 is a module. The module 8 is installed in the case 6, and the loop insertion groove 7 provided in the case 6 is installed so that the loop plate 1 of the antenna 10 shown in FIG. Then, the feeding point 2 of the connection board 2
The electronic device 5 is completed by electrically connecting c and the connection part of the module 8. When the electronic device 5 is operated, the power is turned on, radio waves are transmitted and received from the antenna 10, and the arithmetic circuit in the module 8 performs an arithmetic operation to take out various information. Figure 4 shows the built-in antenna
The antenna 11 shown in FIG.
May be incorporated so as to match According to this configuration, there is an effect that the pitch between loops is more firmly stored.

FIG. 5 is a perspective view showing a third embodiment of the present invention. The difference from the embodiment of FIG. 4 is that the antenna structure uses a core. Reference numeral 4 is a core, and 4a is a groove in which the loop wire 3 is housed. The loop wire 3 is fitted on the core 4 and fixed along the groove 4a. By using such a core 4, there is an effect that the bending of the loop wire 3 in advance is unnecessary.

[0020]

As described above, according to the present invention, a loop is used as an antenna body, and the loop is connected by a connection board on which a conductive pattern is formed.
Preservation of the antenna shape and mounting of electronic components on the antenna have become easier.

[Brief description of drawings]

FIG. 1 is a perspective view showing a completed structure of a loop antenna using a loop plate and a connection board according to a first embodiment of the present invention.

FIG. 2 is a side view showing the shape of the loop plate shown in FIG.

FIG. 3 is a top view showing the shape of the connection board shown in FIG.

FIG. 4 is a perspective view showing an assembled state of a loop antenna using a conductive wire loop which is a second embodiment of the present invention.

FIG. 5 is a perspective view showing an assembled state of a loop antenna using a core which is a third embodiment of the present invention.

FIG. 6 is a top view showing an assembled state of the loop antenna using the loop insertion groove in the electronic device case which is an embodiment of the present invention.

FIG. 7 shows a general configuration of a loop antenna.

FIG. 8 is a perspective view showing a 4-turn loop antenna.

[Explanation of symbols]

 1 Loop Board 2 Connection Board 3 Loop Wire 4 Core 5 Electronic Device 6 Case 7 Loop Insertion Groove 8 Module 9 Electronic Component 10 Antenna 11 Antenna 12 Antenna 15 Loop Antenna 16 Conductive Wire 17 Feed Point 20 4 Turn Loop Antenna 21 Conductive Wire 22 Feed point

Claims (5)

[Claims] 1. In an electronic device having a function of transmitting and receiving radio waves to and from the outside, an antenna for transmitting and receiving the radio waves includes a loop body formed of a conductive plate, a connection board,
An antenna structure for a portable electronic device, comprising: a connection portion with the electronic device main body integrally formed with the connection board. 2. The antenna structure for a portable electronic device according to claim 1, wherein an electronic component is mounted on the connection board. 3. The antenna structure for a portable electronic device according to claim 1, wherein the loop body is formed by bending a linear conductor. 4. The antenna structure for a portable electronic device according to claim 1, wherein the loop body has a linear conductor attached to the antenna core. 5. The antenna structure for a portable electronic device according to claim 1, wherein the loop is inserted along a groove inside the case of the electronic device.