A microstrip filtering patch antenna with asymmetric gain response

Research output: Chapter in Book/Report/Conference proceedingConference contribution


  • Yun Wu
  • Jinhao Dai
  • Liang Sun
  • Yunlong Lu
  • Jifu Huang

Colleges, School and Institutes

External organisations

  • Chinese Academy of Sciences


This paper presents a novel structure of a compact microstrip filtering patch antenna with asymmetric gain response. A rectangle patch antenna is excited by open-loop resonators through apertures in the co-grounded plane. This coupled patch not only produces three reflection zeros to increase the bandwidth of the antenna, but also generates a radiation null at one side of the band edge to improve selectivity. The design and simulation process follow the design method of a third-order cascade trisection (CT) bandpass filter. This integration approach eliminates the 50 Ohm interfaces between the cascaded filter and antenna while achieving an enhanced frequency selectivity. Measured results of the fabricated circuits show a good agreement with the simulation results.

Bibliographic note

Funding Information: ACKNOWLEDGMENT This work was supported by UK EPSRC under Contract EP/M013529/1, and National Nature Science Foundation of China under Grant 61971415&61601456. Publisher Copyright: © 2021 EuMA.


Original languageEnglish
Title of host publication2020 50th European Microwave Conference, EuMC 2020
Publication statusPublished - 2 Feb 2021
Event50th European Microwave Conference, EuMC 2020 - Utrecht, Netherlands
Duration: 12 Jan 202114 Jan 2021

Publication series

NameEuropean Conference on Microwave


Conference50th European Microwave Conference, EuMC 2020


  • asymmetric gain response, band-pass filters, coupling, filtering antenna