Novel half-patch based 1-D periodic structure with better control over stop bandwidth

Irfan Shahid, Dushmantha Thalakotuna, Michael Heimlich

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

1 Citation (Scopus)


In this paper, novel half-patch loaded microstrip line based 1-D periodic structure is discussed. An asymmetric patch once sandwiched between microstrip line and ground present Electromagnetic Bandgap (EBG) characteristics with better control over the stop bandwidth. The proposed arrangement consists of a patch with one end grounded through a via and with other end floating under the microstrip line. Dispersion analysis is carried out to investigate the first two propagating modes of the proposed structure and are compared with a conventional full-patch structures. The effect on stop bandwidth caused by the open end location of the patch is explored. A variation of 10% to 45% in the percentage stop bandwidth is observed by a mere change of patch floating end position under the microstrip line. One such configuration as half-patch structure along with its corresponding full-patch version was fabricated and measured in lab. The measurements show that half-patch structure exhibits 33.8% stop bandwidth when compared to conventional full-patch structure that presents 50% bandwidth. The proposed 1-D periodic structures can be used for narrow band applications that require excellent rejection characteristics with sharp roll off rates.

Original languageEnglish
Title of host publicationProceedings of the 2019 IEEE Asia-Pacific Microwave Conference (APMC)
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages3
ISBN (Electronic)9781728135175, 9781728135168
ISBN (Print)9781728135182
Publication statusPublished - 2019
Event2019 Asia-Pacific Microwave Conference - , Singapore
Duration: 10 Dec 201913 Dec 2019


Conference2019 Asia-Pacific Microwave Conference
Abbreviated titleAPMC


  • Electromagnetic Band gap
  • periodic structure
  • bandstop filters
  • microstrip line


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