A Circularly Polarized SIW Slot Antenna Based on High-Order Dual-Mode Cavity
A Circularly Polarized SIW Slot Antenna Based on High-Order Dual-Mode Cavity
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DOI：
10.1109/lawp.2020.2972115
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发表时间：
2020-03
影响因子：
4.2
通讯作者：
Tian Liang;Zhan Wang;Yuandan Dong
中科院分区：
文献类型：
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作者：
Tian Liang;Zhan Wang;Yuandan Dong
本文提出并研究了一种采用TE202模式（HTM）和本征TE202模式（ETM）的新型圆极化（CP）缝隙基板集成波导（SIW）腔天线。该天线专为ku波段卫星无线链路应用而设计。它利用两种不同且正交的TE202模式（ETM和HTM），在表面蚀刻槽形成左手CP辐射。它是由同轴探头直接馈电与低轮廓。阐述了其工作机理和设计方法。分析了TE202两种高阶模的电流分布。使用短引脚和槽来产生所需的CP辐射。为了验证该方法的可行性，采用传统的印刷电路板工艺对天线进行了仿真和制作。它的测量-10 dB阻抗带宽为4.2%，3 dB轴比（AR）带宽为1.6%。工作频带的峰值增益超过7dbic。天线尺寸为0.92λ0 × 0.90λ0，其中λ0为12.24 GHz的自由空间波长。仿真结果与实测结果吻合较好。
In this letter, a novel circularly polarized (CP) slotted substrate integrated waveguide (SIW) cavity antenna using a hybrid TE202 mode (HTM) and the eigen TE202 mode (ETM) is proposed and studied. The antenna is designed for Ku-band satellite wireless link applications. It utilizes two different and orthogonal TE202 modes (ETM and HTM) with slots etched on the surface to form left-hand CP radiation. It is directly fed by a coaxial probe with a low profile. The working mechanism and the design approach are elaborated. The current distribution for the two TE202 high-order modes is analyzed. Shorting pins and slots are applied to generate the required CP radiation. To verify the feasibility, the antenna is simulated and fabricated using the conventional printed circuit board (PCB) process. It has a measured –10 dB impedance bandwidth of 4.2% and a 3 dB axial ratio (AR) bandwidth of 1.6%. The peak gain is over 7 dBic in the operation band. The antenna has a size of 0.92λ0 × 0.90λ0, where λ0 is the free-space wavelength at 12.24 GHz. Good agreement between the simulation and measurement results is observed.