Surface mounting antenna, and mobile communication device using such antnena

A mobile communication device and surface-mounted technology, which is applied to antenna supports/mounting devices, antennas, resonant antennas, etc., and can solve the problems of lack of adjustment means for antennas, difficulty in miniaturizing antennas, and large area of ​​dielectric substrates.

Inactive Publication Date: 2002-12-04
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Therefore, this kind of antenna does not have adjustment means, and there are relatively large performance differences between products due to different manufacturing methods.
[0008] Also, the surface mount antenna described in JP-A-11-74721 has a structure in which a radiation electrode and a ground electrode are provided on the same main surface of a dielectric substrate, and no special measures are taken to reduce the occupied area of ​​these two electrodes. , the result is that the area of ​​the dielectric substrate is too large, and it is difficult to realize the miniaturization of the antenna
[0009] In this way, the existing surface-mounted antennas have the technical problems of being unable to simultaneously meet the requirements of miniaturization, reduction of characteristic differences between products, and improvement of production efficiency and reliability.

Method used

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  • Surface mounting antenna, and mobile communication device using such antnena
  • Surface mounting antenna, and mobile communication device using such antnena
  • Surface mounting antenna, and mobile communication device using such antnena

Examples

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Effect test

Embodiment 1

[0033] 1, 2, 3 and 4 are respectively a perspective view, a top view, a plan view and a side view of the surface-mounted antenna according to Embodiment 1 of the present invention.

[0034] The main structural elements and electrical characteristics of this embodiment will be described one by one below.

[0035] 1. Substrate

[0036] (a)ε r

[0037] In Figures 1, 2, 3 and 4, the substrate 1 is made of a dielectric material whose relative permittivity ε r It is best to be greater than 4 and less than 150 (more ideally greater than 18 and less than 130). If ε r is less than 4, the size of the substrate 1 is too large, and the antenna cannot be miniaturized, and if ε r If it is greater than 150, the operating frequency band of the antenna is too narrow, and a slight difference or defect in the composition will lead to deviation from the specified frequency band. Not only cannot the desired characteristics be obtained, but also the difference in characteristics will become la...

Embodiment 2

[0089] Fig. 7 is a perspective view of a surface mount antenna according to Embodiment 2 of the present invention.

[0090] From the side surface 1c of the substrate 1 to the main surface 1b, as shown in FIG. The feeding electrode 4a is formed on each of the two surfaces along the main surface and the two surfaces along the side surface of the upper part). With such a structure, the signal input to the feeding electrode 4a is electromagnetically coupled with the radiation electrode 2 at its edge end, and is radiated as an antenna. At this time, since the feeding electrode 4a has the step 6, it is located relatively inside compared with the outer contour of the substrate 1, forming a more suitable and stable electrode configuration, which can feed power to the radiation electrode 2, and can obtain a stable Antenna characteristics.

[0091] In addition, when the antenna of this embodiment is mounted on a printed circuit board, the soldering portion of the feeding electrode is ...

Embodiment 3

[0093] Fig. 8 is a perspective view of a surface mount antenna according to Embodiment 3 of the present invention. As shown in FIG. 8 , the same stepped portions 6 a , 6 b , 6 c , 6 d , and 6 e as those of the stepped portion 6 ( FIG. 7 ) formed in Example 2 are formed across the side surfaces 1 c , 1 d and the main surface 1 b. Then, the fixed electrodes 3a, 3b, 3c, 3d, and 3e are provided on the stepped surfaces 3a', 3b', 3c', 3d', and 3e' of the stepped portions 6a, 6b, 6c, 6d, and 6e.

[0094] In the surface-mounted antenna configured in this way, the welding part of the electrode exists inside the antenna outline compared with Example 2. Therefore, when the antenna is mounted on a printed circuit board, the substrate is more resistant to bending and flexing, and can Improve antenna reliability. In addition, the size of the land pattern formed on the printed circuit board on which the antenna of this embodiment is mounted can be limited within the external dimensions of t...

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PUM

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Abstract

The invention discloses a surface mount antenna and a mobile communication device using the antenna. The radiation electrode is provided on the first main surface of the substrate. The ground electrode is provided on the second main surface of the substrate. The first feeding electrode is provided on at least a part of the side surface and the second main surface of the substrate. The second feeding electrode is formed on the inner wall surface of the hole provided in parallel to the first and second main surfaces. The first feeding electrode and the ground electrode are kept in a non-contact state. The first feeding electrode is electrically connected to the second feeding electrode. A mobile communication device using such a surface-mounted antenna can be miniaturized, has little variation in performance, and has high production efficiency and reliability.

Description

technical field [0001] The present invention relates to a surface-mounted antenna used in a positioning device and the like, and more particularly to a surface-mounted antenna mounted on a portable terminal device and the like, and a mobile communication device using the antenna. Background technique [0002] A system that attaches a positioning device to a portable terminal device such as a mobile phone and transmits its current position information to a specific party has begun to be put into practical use. For example, when the carrier of the portable terminal device encounters an emergency (traffic accident, etc.), he can quickly respond to the situation by transmitting the current position information to a predetermined place (rescue center, etc.) by operating the terminal device. [0003] Antennas used in such portable terminal devices are limited in size, and surface-mounted antennas are often used. For example, the surface mount antenna described in Japanese Patent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q13/08H01Q1/24H01Q1/38H01Q9/04H01Q21/28H01Q21/30
CPCH01Q1/243H01Q1/38H01Q9/0407H01Q21/28H01Q21/30
Inventor 後藤和秀尾中良雄吉之元淳崎田主实佐佐木胜美椎叶健吾
Owner PANASONIC CORP
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