A novel wideband circularly polarized (CP) horn antenna with a pair of twisted ridges is investigated in this communication. The wide impedance bandwidth is obtained by adapting a pair of exponential-shaped ridges, whereas the wide axial ratio (AR) bandwidth is achieved by twisting the ridges. The impedance matching and AR can be tuned easily and independently, which is an attractive feature of the design. An $X$ -band right-hand circular polarization (RHCP) design was simulated with CST Microwave Studio. Its metal-printed prototype was fabricated to validate the simulation. The measured 15 dB impedance and 3 dB AR bandwidths are 53% (7.43–12.80 GHz) and 65% (7.63–15.00 GHz), respectively, with an overlapping bandwidth of 51% (7.63–12.80 GHz). The measured peak antenna gain is between 8.0 and 10.1 dBic in the operating band.

中文翻译：

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3D打印圆极化扭曲脊喇叭天线

在这种通信中，研究了一种具有一对扭曲脊的新型宽带圆极化（CP）喇叭天线。通过适配一对指数形的脊可获得宽的阻抗带宽，而通过扭转脊可获得宽的轴向比率（AR）带宽。阻抗匹配和AR可以轻松，独立地进行调整，这是该设计的一个吸引人的功能。一个 $ X $ CST Microwave Studio模拟了宽带右旋圆极化（RHCP）设计。制造了金属印刷的原型以验证仿真。测得的15 dB阻抗和3 dB AR带宽分别为53％（7.43–12.80 GHz）和65％（7.63–15.00 GHz），重叠带宽为51％（7.63–12.80 GHz）。在工作频带中，测得的峰值天线增益在8.0至10.1 dBic之间。