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Aperture Efficiency Study of Square Reflect Array Antennas

¹ Department of Electrical Engineering, Urmia University, Urmia, Iran
² Department of Electrical Engineering, Urmia University, Urmia, Iran
³ Department of Electrical Engineering, Urmia University, Urmia, Iran
⁴ Department of Electrical Engineering, Urmia University, Urmia, Iran

Wireless Engineering and Technology·Volume 09 (2018)·Pages 66–78·Published 13 July 2018·DOI10.4236/wet.2018.93006

Abstract

This paper presents a detailed study of square reflect array (RA) antenna aperture efficiency ( η a ). Effects of quantization-phase and limited phase-range errors on radiation pattern, half-power beam width (HPBW) and η a for different feed locations are investigated. Results show an in-crease in side-lobe levels (SLLs) and a slightly reduction in η a with quantization-phase augmentation or element phase-range reduction, however, the effects on HPBW are negligible. Nevertheless, the degradation in η a 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 η a . It is perceived that the offset-angle plays an important role to determine η a , especially for feed with narrow beam width.

KeywordsAperture EfficiencyLimited Phase-Range ErrorQuantization-Phase ErrorReflect array AntennasSquare Aperture

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Aperture Efficiency Study of Square Reflect Array Antennas

Abstract

References (15)