Surface wave distribution over Electromagnetic Bandgap (EBG) and EBG reflective shield for patch antenna

Kazuoki Matsugatani, Makoto Tanaka, Shinji Fukui, Won Ho Kim, Moonil Kim

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Surface wave distribution over electromagnetic bandgap (EBG) plate is measured and suppression of surface wave propagation over the EBG is investigated. We used a micro current probe that detects H-field strength of the propagating transverse magnetic (TM) microwave up to 6 GHz. By scanning with the probe over the EBG, we visualized surface wave distribution at various frequencies. This visualized map shows that the EBG plate suppresses the surface wave propagation within the bandgap frequency. We utilized this effect for the antenna reflective shield. By combining the EBG with a microstrip patch antenna, this EBG works as a reflective shield and the front-to-backward radiation ratio of antenna is increased. In this experiment, we fabricated three types of shield board; mushroom type of EBG that has hexagonal textured patches connected with via-holes, textured surface without via-holes, and plane metal. By comparing the surface wave distributions and beam patterns of antenna with various shields, we found that the visualized map of TM surface wave gives us direct and intuitive information and helpful tips in designing the EBG reflective shield for patch antenna.

Original languageEnglish
Pages (from-to)2341-2348
Number of pages8
JournalIEICE Transactions on Electronics
VolumeE88-C
Issue number12
DOIs
Publication statusPublished - 2005 Dec

Keywords

  • Antenna
  • EBG
  • Microwave
  • Surface wave

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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