Foldable F-inverted and annular combined multi-frequency-range communication antenna

Abstract

The invention discloses a foldable F-inverted and annular combined multi-frequency-range communication antenna. The antenna comprises an antenna body which is at least one conductor subcircuit and is provided with a grounding point and a feeding point; on the antenna body, a first branch and a second branch are formed based on the feeding point as an initial end, and a third branch is formed based on the grounding point as an initial end; and the second branch is connected with the tail end of the third branch to form a semi-close first gap, the first branch and the second branch form a semi-close second gap, the joint part of the second branch and the third branch and the tail end of the first branch form a third gap, and the antenna body is also provided with a fourth branch which is generated on the initial end of the third branch. The antenna has the advantages of simple structure, good electrical energy and the like.

Description

[technical field] [0001] The invention relates to the field of communication, in particular to the field of antennas for mobile communication terminals. [technical background] [0002] Traditional PIFA and monopole antennas often obtain high-frequency bandwidth by adding a short-circuit coupling parasitic when dealing with multi-band applications. In a large number of engineering applications, some unfavorable factors about the short-circuit parasitic mode have been found, which restricts the further application of this form of antenna in the multi-band and increasingly complex and diverse design and function environment. [0003] 1. Short-circuit parasitic needs to leave a certain gap from the excitation antenna, which increases the occupied area of ​​the antenna. In the case of ultra-thin models, complex IDs, and many functional devices, the occupation of short-circuit parasitic often increases the difficulty of design [0004] 2. The directivity of the short-circuit para...

AI Technical Summary

Problems solved by technology

In a large number of engineering applications, some unfavorable factors about the short-circuit parasitic mode have been found, which restricts the further application of this form of antenna in the multi-band and increasingly complex and diverse design and function environment.

[0003] 1. Short-circuit parasitic needs to leave a certain gap from the excitation antenna, which increases the occupied area of ​​the antenna. In the case of ultra-thin models, complex IDs, and many functional devices, the occupation of short-circuit parasitic often increases the difficulty of design

[0004] 2. The directivity of the short-circuit parasitic itself, the field type is self-coupling, and the sensitivity to the surrounding metallic components is high. The actual generated radiation pattern is often distorted, and the probability of blind spots is relatively high. In the high-frequency 3G (W2100 ) application, there are hidden dangers such as unstable data flow and dropped calls during mobile data transmission

[0007] 2) Flexible printed circuit board etching (FPC): Since the etching accuracy of flexible printed circuit boards is generally higher than that of metal shrapnel stamping, the gap can be further reduced, and the line width of short-circuit coupling parasitic can be further reduced, which brings certain advantages to the design. Convenience, but as the gap is further narrowed and the coupling progression increases, this growth puts forward greater requirements for assembly. Except for a few large international companies that use machine placement, most mobile phone manufacturers still use manual placement way to assemble

The gap is stretched and deformed when it encounters bending, and it will warp when the surface design of the curved surface and curved surface is unreasonable. There will also be deformation, warping and other conditions, which bring great hidden dangers to the stability of high-frequency performance

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