PIFA (Planar Inverted F-shaped Antenna) based on multiple resonance modes

Abstract

The invention provides a PIFA (Planar Inverted F-shaped Antenna) based on multiple resonance modes, which comprises a dielectric substrate, a grounding plane, a radiation patch, a short-circuit metalsheet and a feed unit, wherein the radiation patch is provided with a rectangular groove at the zero current position in a mode A so as to excite a mode B, and the resonant frequency of the mode B isreduced under the premise of keeping the resonant frequency of the mode A basically unchanged by increasing the length of the rectangular groove so as to achieve the purpose of expanding the bandwidthof the antenna. Meanwhile, the resonant frequency of a mode C is increased under the premise of basically not influencing the resonant frequencies of the mode A and the mode B by reducing the lengthof the radiation patch so as to further expand the bandwidth of the antenna. In addition, the top of a feed probe is provided with a rectangular metal sheet to realize the capacitive coupling feed, and impedance matching is achieved by adjusting the length and the width of the rectangular metal sheet. According to the invention, the bandwidth of the antenna is effectively expanded by combining thethree resonant modes A, B, C. The PIFA is compact in structure, has broadband characteristics and is applicable to transmitting and receiving equipment of a wireless communication system.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a PIFA (Planar Inverted F-shaped Antenna, Planar Inverted F-shaped Antenna) based on a multi-resonance mode. Background technique [0002] The rapid development of modern wireless communication technology puts forward higher and higher requirements for terminal equipment. Many systems require an antenna with a large operating bandwidth and a simple structure that can be easily integrated with wireless communication devices. The microstrip patch antenna has the advantages of small shape, low cost, and easy manufacture, and has been extensively researched and developed in recent years. [0003] The microstrip antenna has the following advantages: first, the profile is low, that is, the size of the antenna is small, and it is easy to integrate on the printed circuit board (Printed Circuit Board, PCB); second, the performance of the microstrip antenna is very ...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a PIFA based on multi-resonant modes, which solves the problem that the existing PIFA impedance bandwidth is too narrow, and the existing antenna bandwidth extension technology cannot effectively solve the problem of narrow impedance bandwidth of the microstrip antenna. The method of slotting the patch and changing the aspect ratio of the radiation patch realizes the multi-resonance mode of the antenna, thereby increasing the impedance bandwidth of the antenna

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