Developing basic configuration of triangle array antenna for circularly polarized-Synthetic Aperture Radar sensor application
Developing basic configuration of triangle array antenna for circularly polarized-Synthetic Aperture Radar sensor application
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DOI：
10.1109/icramet.2017.8253157
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发表时间：
2017-10
期刊：
影响因子：
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通讯作者：
M. Purnomo;A. Kitagawa
中科院分区：
文献类型：
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作者：
M. Purnomo;A. Kitagawa
雷达技术、合成孔径雷达（SAR）和无人机（UAV）的发展要求通信设备和基础设施具有多种平台和高质量的图像。本文给出了圆极化合成孔径雷达（CP-SAR）传感器嵌入小型无人机或无人机空域的三角阵列天线基本结构，该天线结构紧凑、体积小、结构简单。为了快速计算出贴片天线上的未知电流，在数值分析中采用矩量法（MoM）。三角形阵列天线的研制由四个简单的等边三角形贴片组成，每个贴片加截断角，谐振频率为f = 1.25 GHz。采用接近耦合、微扰段、单次馈电等方法从辐射贴片产生圆极化波。公司馈线设计是通过组合一些t型结来实现的，将电流从输入端口分配到辐射片并到达2×2片。该天线在谐振频率下的增益和轴比（Ar）分别为11.02 dBic和2.47 dB。此外，在仰角平面上出现的两束光束具有相似的值，即平均波束宽度为10 dbic时，增益和3 dB-Ar分别约为20°和70°。
The development of radar technology, Synthetic Aperture Radar (SAR) and Unmanned Aerial Vehicle (UAV) requires the communication facilities and infrastructures that have variety of platforms and high quality of image. In this paper, we obtain the basic configuration of triangle array antenna using corporate feeding-line for Circularly Polarized- Synthetic Aperture Radar (CP-SAR) sensor embedded on small UAV or drone airspace with compact, small, and simple configuration. The Method of Moments (MoM) is chosen in the numerical analysis for fast calculation of the unknown current on the patch antenna. The developing of triangle array antenna is consist of four patches of simple equilateral triangle patch with adding truncated corner of each patch and resonant frequency at f = 1.25 GHz. Proximity couple, perturbation segment, single feeding method are applied to generate the circular polarization wave from radiating patch. The corporate feeding-line design is implemented by combining some T-junctions to distribute the current from input port to radiating patch and to reach 2×2 patches. The performance results of this antenna, especially for gain and axial ratio (Ar) at the resonant frequency are 11.02 dBic and 2.47 dB, respectively. Furthermore, the two-beams appeared at boresight in elevation plane have similar values each other i.e. for average beamwidth of 10 dBic-gain and the 3 dB-Ar are about 20° and 70°, respectively.