A Miniaturized Cavity backed Archemedian Spiral Antenna for mm-Wave Applications

M. Saad Khan, Farooq A. Tahir, M. Umar Khan, Hammad M. Cheema, Atif Shamim

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Design of a UWB circularly polarized, cavity-backed Archimedean spiral antenna is presented in this paper. The antenna is designed for 18- 40 GHz frequency range with a binomially tapered parallel-strip to microstrip balun and RF foam absorbent for controlling the backscattering. The peak-measured gain is 4.5 dBi and is greater than 2 dBi for the entire band. The antenna is characterized by greater than 50 degrees 3 dB gain and axial ratio beam-widths which makes it highly suitable for airborne applications. Axial ratio is below 2 dB for the band of interest. The height of the antenna cavity is 19 mm and the diameter is 23 mm giving the antenna a low profile meeting the space requirements of any RF system.
Original languageEnglish (US)
Title of host publication2021 International Applied Computational Electromagnetics Society Symposium (ACES)
ISBN (Print)978-1-6654-3447-8
StatePublished - 2021

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Electrical and Electronic Engineering


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