Multi-frequency antenna

Abstract

The invention is concerned with the multi-frequency antenna, includes the radial lamella, the ground plate parallel distance with the radial lamella, the resonant cavity and the two conductive chip allocate in between the space of the radial lamella and the ground plate; the radial lamella is in 'Z' shape with the first metal chip and the second metal chip expanding to different direction where the first conductive chip expending downwards from the side of the first metal chip as the feed-in terminal, and the second conductive chip expending downwards from the side of the second metal chip to connect with the ground plate electrically as the grounding terminal, and the first metal chip expending of the side of the first conductive chip connecting with the second metal chip of the side of the second conductive chip.

Description

【Technical field】 [0001] The invention relates to a multi-frequency antenna, in particular to a small flat-panel antenna. 【Background technique】 [0002] In modern electronic equipment, the use of wireless communication technology for wireless transmission of data, sound, images, etc. has been more and more used. Antenna, as a component used to induce electromagnetic waves, is a necessary device for the application of wireless communication technology equipment. The early antennas were mostly installed outside the electronic equipment, mainly monopole or helical antennas, which have the characteristics of relatively simple design and high gain coefficient, but these antennas are large in size and installed outside the electronic equipment, and they also require matching The connecting device makes the structure more complicated, and the antenna has a strong directivity. When using it, it is necessary to change the direction of the antenna from time to time to obtain a bette...

AI Technical Summary

Problems solved by technology

The planar antenna can achieve the required impedance matching by adjusting the position, area and shape of the extension piece 41' to match the frequency. In order to make the signal end work at different frequencies, the antenna is provided with at least two feeding points to obtain different The input impedance makes the antenna structure more complex

And Chinese Taiwan Patent Announcement No. TW 284088 (please refer to Fig. 1 shown in the attached drawing of this patent) discloses a kind of multi-frequency inverted F planar antenna structure, this antenna provides a kind of miniaturized planar antenna, this antenna utilizes a The ground component is connected to the ground terminal to increase the electrical length of the ground to adjust the impedance of the antenna, thereby ensuring that the antenna has sufficient bandwidth, but the increased ground component makes the structure of the antenna not simple enough. On the other hand, the antenna must be attached to Fix it on other insulating structures (please refer to Figure 2 of the patent drawings), and due to the limitation of the internal space of electronic equipment, there is often no suitable space for installing this kind of antenna in some electronic equipment

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