Printed Leaky-Wave Antenna with Aperture Control using Width-Modulated Microstrip Lines and TM Surface-Wave Feeding by SIW Technology

Maksim Kuznetcov, Victoria Gomez-Guillamon Buendia, Zain Shafiq, Ladislau Matekovits, Dimitris E. Anagnostou, Symon Podilchak

Research output: Contribution to journalArticlepeer-review

Abstract

The article presents a width-modulated microstrip line leaky-wave antenna (LWA) with substrate integrated waveguide and microstrip feeding. In particular, the planar antenna system consists of an integrated surface-wave launcher and three identical rows of quasi-periodic width-modulated microstrip lines for TM leaky-wave excitation which produces a tailored binomial-like aperture distribution on the guiding surface. The behavior of the antenna when changing the width-modulated lines for different aperture distributions is also analysed and presented. The measured LWA demonstrates a fan beam pattern in the far-field with realized gain values greater than 10 dBi and with a beam direction of about -20° from broadside at 23 GHz. Also, far-field measurements and near-field data indicate that the half-power beamwidth is below 10° and the position of the main beam maximum is relatively stable; i.e. ranging from about -23° to -15° between 23 to 24 GHz. The measured prototype is also well matched over these frequencies and |S11| < -20 dB at 23.5 GHz.
Original languageEnglish
JournalIEEE Antennas and Wireless Propagation Letters
DOIs
Publication statusPublished - 24 Jul 2019

Keywords

  • microstrip antennas
  • Antenna measurements
  • aperture antennas
  • surface waves
  • microstrip components

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