Title :
Circularly polarised array antenna with cascade feed network for broadband application in C-band
Author :
Karamzadeh, S. ; Rafii, V. ; Kartal, M. ; Ucan, O.N. ; Virdee, B.S.
Author_Institution :
Dept. of Electr. & Electron. Eng., Istanbul Aydin Univ., Istanbul, Turkey
Abstract :
A new configuration of a circularly polarised square slot antenna (CPSSA) array operating in C-band is presented. The array consists of 2 × 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 × 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.
Keywords :
antenna feeds; broadband antennas; microwave antenna arrays; AR bandwidth; C-band; CPSSA array; VSWR; axial ratio bandwidth; bandwidth 3.4 GHz to 7.8 GHz; broadband application; cascade feed network; circuit stripline coupler; circularly polarised square slot antenna array; delay line; gain 3 dB; voltage standing wave ratio;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2014.1147
