A coplanar waveguide fed two arm archimedean spiral slot antenna with improved bandwidth

Research output: Contribution to journalArticlepeer-review


  • O Ahmad Mashaal
  • S K A Rahim
  • A Y Abdulrahman
  • M I Sabran
  • M S A Rani

Colleges, School and Institutes

External organisations

  • Universiti Teknologi Malaysia


A compact wideband circularly polarized (CP) printed antenna design is presented in this communication. The proposed antenna consists of two Archimedean spiral slots, loaded with two chip resistors and fed by a coplanar waveguide (CPW) transmission line. The antenna is situated in one plane and fed without using an external balun or a matching network. The antenna has wideband input impedance bandwidth with circular polarization (CP), and broad beamwidth radiation pattern over 1.6:1 bandwidth. The study has shown that the proposed antenna is capable of improving the CP bandwidth and reducing the overall antenna size.


Original languageEnglish
Article number6338270
Pages (from-to)939-943
JournalIEEE Transactions on Antennas and Propagation
Issue number2
Publication statusPublished - Feb 2013