Low Profile Dual Polarized Monopulse Antenna Excited by A Single-Layer Substrate Integrated Waveguide Enabled Comparator

Jing Ya Deng, Lin Qian Luo, Wei Lin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

A low profile and compact two-dimensional (2-D) dual-polarized monopulse antenna excited by a single-layer substrate integrated waveguide (SIW) enabled comparator is reported. As the beamforming feed network, the SIW based comparator consists of four hybrid rings that provide excitations with proper amplitudes and phases to four cavity backed slot antennas (CBSA). Thanks to the compactly cascaded design of the four hybrid rings, the monopulse array can provide two sum beams and two 2-D difference beams with different polarizations when each input port is individually excited. To prove the concept, a prototype is designed, fabricated and measured at K band. The measured results exhibit the developed antenna is operating at 22.4 GHz for all four ports. The realized gain values of the dual-polarized sum beams are 11.19 dBi for vertical polarization and 11.52 dBi for horizontal polarization, respectively, and the values of the difference beams in xoz-plane and yoz-plane are 9.81 dBi and 9.65 dBi, respectively. The null-depth of the difference beam is -24.65 dB. Noticeably, the profile of the final prototype is only 0.13 λ0 that makes it ideal candidate for wireless applications require low profile 2-D monopulse antennas.

Original languageEnglish
Article number10330040
Pages (from-to)1-5
Number of pages5
JournalIEEE Antennas and Wireless Propagation Letters
DOIs
Publication statusPublished - Nov 2023

Keywords

  • Antenna feeds
  • Antennas
  • cavity backed slot antenna
  • coupling slot
  • dual-polarization
  • hybrid ring
  • Microstrip
  • Microstrip antennas
  • monopulse antenna
  • Scattering parameters
  • Slot antennas
  • substrate integrated waveguide (SIW)
  • Substrates

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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