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Broadband filter antenna

A filter antenna and broadband technology, applied in the field of broadband filter antenna, can solve the problems of large size, low efficiency, narrow working bandwidth, etc., and achieve the effect of improving out-of-band suppression, realizing filtering performance, and improving frequency selectivity on both sides

Active Publication Date: 2018-12-21
NANTONG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the existing design technology, there are either problems of large size and low efficiency, or problems of narrow operating bandwidth

Method used

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Embodiment Construction

[0024] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The drawings show typical embodiments of the invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0025] The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the present in...

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Abstract

Broadband filter antenna, includes five layers from top to bottom, The first layer structure comprises a top layer patch structure, the second layer structure comprises a bottom layer patch structure,the third layer structure comprises two folding resonators, the fourth layer structure comprises a large metal formation with a pair of vias, and the fifth layer structure comprises a feeding structure. The invention solves the problem of large plane size and realizes the filtering performance of the antenna. Three reflective zeros are generated by stacked multi-patch resonator to widen the bandwidth of the antenna. The odd mode of the resonator produces the low-end radiation zero, and the coupling between the top and bottom patch structures produces the high-end radiation zero, so as to improve the frequency selectivity of both sides of the working band. By adjusting the impedance ratio of the first part and the second part of the folding resonator, the low-end radiation zero can be adjusted while maintaining the bandwidth. The out-of-band mode is suppressed by using the short-circuit branch loaded on the feeder to improve the out-of-band suppression at the high end of the antenna frequency.

Description

Technical field [0001] The present invention relates to the field of communication, in particular to a broadband filter antenna. Background technique [0002] With the rapid development of wireless communication technology, the requirements for antenna integration and miniaturization are increasing, and antennas that integrate multiple functions have become a development trend. In most wireless communication systems, a band-pass filter is always followed by the receiving antenna and the two are cascaded. Therefore, integrating the two to form a filter antenna can effectively reduce the number of components and reduce the impact of the filter. Loss, to improve the matching of the edge of the passband, and improve the overall efficiency. [0003] For filter antennas, many design techniques have been reported. For example, an impedance converter can be used to cascade the antenna and the filter to achieve the integration of filtering and antenna functions; or the antenna can be used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/38H01Q1/48H01Q1/50H01Q13/10H01Q13/08
CPCH01Q1/38H01Q1/48H01Q1/50H01Q13/08H01Q13/10
Inventor 施金张诚曹青华张威徐凯陈建新杨汶汶
Owner NANTONG UNIVERSITY
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