Low-profile wide-stop-band circular dielectric patch filter antenna

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By designing a wide stopband circular dielectric patch filter antenna with low profile, the combined structure of dielectric ring and circular dielectric patch is used to achieve the balance of low profile, high stopband and good filtering characteristics, and the problems of large profile and narrow stopband in the prior art are solved.

CN119695507APending Publication Date: 2025-03-25IANGSU COLLEGE OF ENG & TECH

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Patent Information

Application Number: CN202411859728.X
Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner
Filing Date: 2024-12-17
Publication Date: 2025-03-25

Application Information

Patent Timeline

17 Dec 2024

Application

CN202411859728.X

25 Mar 2025

Publication

CN119695507A

IPC: H01Q15/00; H01Q1/36; H01Q1/50

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Application Domain

Radiating elements structural forms Antennas earthing switches association

Technology Topics

Dielectric Microwave

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AI Technical Summary

Technical Problem

The existing dielectric resonator filter antennas have problems such as large profiles and insufficient stopbands, making it difficult to take into account both low profiles and wide stopbands.

Method used

A low-profile wide stopband circular dielectric patch filter antenna is designed. Through the combination of dielectric ring and circular dielectric patch, the structure of rectangular grooves and non-metalized through holes is used to couple the excitation TM mode and suppress the high-order mode to form a high-end radiation zero point and improve frequency selectivity.

Benefits of technology

The low profile, high stopband and good filtering characteristics of the antenna are achieved, and good frequency selectivity and stopband width are provided.

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Abstract

The invention belongs to the field of microwave communication, and provides a low-profile wide-stop-band circular dielectric patch filter antenna, which couples a signal to a top circular dielectric patch through a rectangular groove, and introduces two non-metallized via holes in the middle of the circular dielectric patch to suppress a high-order mode of a dielectric, so that the antenna has a good stop band, and the antenna has a wide stop band. The outer dielectric ring is coupled and excited by the circular dielectric patch, and electric fields of the dielectric ring and the circular dielectric patch counteract each other to generate a high-end radiation zero point, so that the antenna has good frequency selectivity, and meanwhile, the antenna has the characteristics of low profile and high stop band.

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