This study presents a novel design of circularly polarised horn antenna in W-band with wide impedance bandwidth and 3 dB axial ratio (AR) bandwidth. By introducing a pair of grooves on the wall of a horn antenna, this simple and compact structure is capable of generating a circular polarisation (CP) wave without any extra polariser and is expecting a better power-handling capability. The full-wave simulation results show that 36.9% bandwidth from 75.4 to 109.5   GHz can be achieved with S ₁₁ <−21   dB and AR<3   dB, while the directivity is 16.56 ± 1.37 dBic. It is anticipated that the proposed antenna is suitable for wideband mmWave applications.

中文翻译：

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W波段槽壁圆极化号角天线

这项研究提出了一种新颖的W波段圆极化喇叭天线设计，该天线具有宽阻抗带宽和3 dB轴向比率（AR）带宽。通过在喇叭天线的壁上引入一对凹槽，这种简单而紧凑的结构能够产生圆极化（CP）波，而无需任何额外的极化器，并且期望有更好的功率处理能力。全波仿真结果表明，带宽从75.4到109.5达到36.9％   GHz可以通过 小号 ₁₁ <−21   dB和AR <3   dB，而方向性为16.56±1.37 dBic。可以预期，所提出的天线适用于宽带毫米波应用。