Broadband frequency and angular response of a sinusoidal bull's eye antenna

被引：9
作者：
Beaskoetxea, U. [1 ]
Navarro-Cia, M. [2 ]
Beruete, M. [1 ]
机构：
[1] Univ Publ Navarra, Antennas Grp TERALAB, Campus Arrosadia, Pamplona 31006, Spain
[2] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England
来源：
JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2016年 / 49卷 / 26期
关键词：
bull's eye; corrugated surface; leaky-wave horn antenna; millimeter waves; sinusoidal profile; TRANSMISSION; LIGHT;
D O I：
10.1088/0022-3727/49/26/265103
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A thorough experimental study of the frequency and beaming angle response of a metallic leaky-wave bull's eye antenna working at 77 GHz with a sinusoidally corrugated profile is presented. The beam scanning property of these antennas as frequency is varied is experimentally demonstrated and corroborated through theoretical and numerical results. From the experimental results the dispersion diagram of the n = -1 and n = -2 space harmonics is extracted, and the operation at different frequency regimes is identified and discussed. In order to show the contribution of each half of the antenna, numerical examples of the near-field behavior are also displayed. Overall, experimental results are in good qualitative and quantitative agreement with theoretical and numerical calculations. Finally, an analysis of the beamwidth as a function of frequency is performed, showing that it can achieve values below 1.5 degrees in a fractional bandwidth of 4% around the operation frequency, which is an interesting frequency-stable broadside radiation.
引用
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页数：6
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