Gain enhancement of a wideband rectangular ring monopole millimeter-wave antenna using artificial magnetic conductor structure

Ashok Kumar*, Ashok Kumar*, Arjun Kumar

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

In this article, the design and development of an artificial magnetic conductor (AMC)-backed compact wideband rectangular ring monopole antenna with high gain is proposed for millimeter-wave (mmWave) applications. It is constructed through stacking a coplanar waveguide (CPW)-fed rectangular ring patch monopole antenna over a square modified AMC reflector surface of 5 × 5 periodic unit cells. Primarily, the ring monopole antenna of size 1.21λ0 × 1.21λ0 × 0.023λ0 (at 28 GHz) is designed and exhibits wide impedance bandwidth of 30.64% (25.98–35.38 GHz, 9.4 GHz), a peak gain of 4.86 dBi and front-to-back ratio (FBR) up to 5.2 dB. To enhance the radiation performance of the monopole antenna, a periodic lattice of 5 × 5 unit cells modified square AMC surface with a gap of 0.84λ0 is proposed and it functioned as reflector which enhances the peak gain of about ~77% and it contributes FBR up to 15 dB. Measured results of the modified square AMC-backed monopole antenna reveal a wide impedance bandwidth of 31.27% (25.90–35.50 GHz, 9.6 GHz), a peak gain of 8.59 dBi, and stable radiation characteristics.

Original languageEnglish
Article numbere23319
JournalInternational Journal of RF and Microwave Computer-Aided Engineering
Volume32
Issue number10
DOIs
Publication statusPublished - Oct 2022
Externally publishedYes

Keywords

  • artificial magnetic conductor
  • millimeter-wave antenna
  • monopole antenna
  • square ring patch antenna

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