A hat‐fed reflector antenna with large radius of ring‐shaped phase center (RSPC) is reported in this article. First, a new phase efficiency calculation model (PECM) based on new phase reference point is presented, which can accurately calculate the phase efficiency of a hat‐fed with arbitrary radius of RSPC. Second, based on the invented PECM, the hat‐fed can be optimized by using cosimulation method of HFSS and MATLAB, high aperture efficiencies are achieved in the whole band. To prove the validity of the new PECM, a hat‐fed reflector antenna with large radius of RSPC is designed, manufactured, and measured. The measured results are in good agreement with the simulations. The results show that the developed hat‐fed reflector antenna has achieved a VSWR of less than 1.18, the peak realized gain of 43.5 dBi and an aperture efficiency of higher than 67.4% in the entire band from 12.25 to 14.5 GHz.

中文翻译：

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新的相位效率计算模型，用于优化具有任意半径的环形相位中心的带帽反射镜天线

本文报道了带有大半径环形相位中心（RSPC）的带帽反射器天线。首先，提出了一种基于新相位参考点的新相位效率计算模型（PECM），该模型可以精确计算具有任意半径RSPC的帽子进给的相位效率。其次，基于本发明的PECM，可以通过使用HFSS和MATLAB的联合仿真方法对帽子进料进行优化，从而在整个频段上实现高光圈效率。为了证明新型PECM的有效性，设计，制造和测量了具有大半径RSPC的带帽反射器天线。测量结果与仿真结果吻合良好。结果表明，开发的带帽反射镜天线的VSWR小于1.18，峰值实现增益为43。