Aperture Efficiency Study of Square Reflect Array Antennas

• 作者: Bahman Mohammadi Changiz Ghobadi Farzad Alizadeh Javad Nourinia
• 来源期刊: 无线工程与技术(英文)
• 学科: 医学
• 关键词: APERTURE Efficiency Limited Phase-Range ERROR Quantization-Phase ERROR Reflect array ANTENNAS SQUARE APERTURE
• 年，卷（期）: 2018,（3）
• 页码范围: 66-78
• 页数: 13页
• 分类号: R73

摘要

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.