A Compact Beam-Scanning Leaky-Wave Antenna With Improved Performance
A Compact Beam-Scanning Leaky-Wave Antenna With Improved Performance
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DOI：
10.1109/lawp.2018.2817478
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发表时间：
2018-03
影响因子：
4.2
通讯作者：
Shujaat Ali Khan Tanoli;Mohammad Ismail Khan;Qaiser Fraz;Xiaodong Yang;Syed Aziz Shah
中科院分区：
文献类型：
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作者：
Shujaat Ali Khan Tanoli;Mohammad Ismail Khan;Qaiser Fraz;Xiaodong Yang;Syed Aziz Shah
本文提出了一种小型化微带漏波天线(MLWA)，降低了副瓣电平，提高了线性扫频能力。引入对称八木单元，通过辐射MLWA物理端的剩余功率来降低旁瓣电平，并使辐射面(XZ面)对称。缺陷地平面用于优化类八木元件的工作。测试结果表明，在4.8 GHz频段，旁瓣抑制约16d B。为了进一步降低旁瓣电平，提高扫频能力，增加增益，天线的泄漏部分被逐渐变小，并引入了两个尺寸相等的缝隙。与传统MLWAs相比，频率束扫描得到了78°的总波束扫描(从侧面[12°]到尾火[90°])。对制作的样机进行了测量，结果与模拟结果吻合较好。
A compact microstrip leaky-wave antenna (MLWA) with reduced sidelobe level and increased linear frequency-scanning capability is proposed in this letter. Symmetric Yagi-like elements are introduced, which reduce the sidelobe level by radiating the remaining power at the physical end of MLWA, and make the radiation plane (xz plane) symmetric. Defected ground plane is used to optimize the working of Yagi-like elements. Measured results show that the sidelobe is suppressed about 16 dB at 4.8 GHz. To further reduce the sidelobe level, improve frequency-scanning capability, and increase the gain, the leaky section of the antenna is tapered, and two slots of equal dimensions are introduced. The frequency beam scanning is improved compared with the conventional MLWAs by achieving a total beam scan of 78° (from broadside [12°] to endfire [90°]). The measurements performed on the fabricated prototype exhibit good agreement with simulations.