Circularly polarised array antenna with cascade feed network for broadband application in C-band

Karamzadeh S., RAFII V., Kartal M., Ucan O. N. , Virdee B. S.

ELECTRONICS LETTERS, vol.50, no.17, pp.1184-1185, 2014 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 50 Issue: 17
  • Publication Date: 2014
  • Doi Number: 10.1049/el.2014.1147
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1184-1185
  • Istanbul Technical University Affiliated: Yes


A new configuration of a circularly polarised square slot antenna (CPSSA) array operating in C-band is presented. The array consists of 2 x 2 CPSSA elements and is fed by a novel feeding network consisting of the circuit stripline couplers and delay lines. The proposed feeding technique is applied to the 2 x 2 antenna array to increase the axial ratio (AR) bandwidth. The measured impedance bandwidth for a voltage standing wave ratio (VSWR) <2 is around 78.5% (3.4-7.8 GHz), the 3 dB AR bandwidth is about 35.7% (4.6-6.6 GHz) and the antenna has an average 14.2 dBic gain over the 3 dB AR bandwidth. The measured results corroborate well with the simulated results.