TITLE:
Aperture Efficiency Study of Square Reflect Array Antennas
AUTHORS:
Javad Nourinia, Changiz Ghobadi, Bahman Mohammadi, Farzad Alizadeh
KEYWORDS:
Aperture Efficiency, Limited Phase-Range Error, Quantization-Phase Error, Reflect array Antennas, Square Aperture
JOURNAL NAME:
Wireless Engineering and Technology,
Vol.9 No.3,
July
20,
2018
ABSTRACT: This paper presents a detailed study of square reflect array (RA) antenna aperture efficiency (ηa). Effects of quantization-phase and limited phase-range errors on radiation pattern, half-power beam width (HPBW) and ηa for different feed locations are investigated. Results show an in-crease in side-lobe levels (SLLs) and a slightly reduction in ηa with quantization-phase augmentation or element phase-range reduction, however, the effects on HPBW are negligible. Nevertheless, the degradation in ηa is negligible when the quantization-phase is lower than 30° or phase-range is more than 300°. Parametric studies have been carried out to provide design guidelines to maximize ηa. It is perceived that the offset-angle plays an important role to determine ηa, especially for feed with narrow beam width.