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提出一种新型的工作在毫米波段的平面矩形槽圆极化天线。该平面矩形槽天线由四个两两相对的平面矩形槽天线组成,并通过刻在地板上的正交十字耦合缝隙激励这个两对矩形槽实现圆极化,同时,在天线辐射槽周围通过四排围成方形的接地柱抑制平面天线的表面波,从而实现平面矩形槽天线在毫米波段的高效率工作。本文中天线的设计和分析由CST微波工作室软件仿真得到。通过对圆极化实现原理的研究和参数分析及优化,最终得到的平面矩形槽天线的圆极化中心频率为24.13GHz,轴比带宽为280MHz,反射损耗在此频带内优于-20dB,天线增益为8.1 dBi。
A new type of planar rectangular slot circularly polarized antenna working in millimeter waveband is proposed. The planar rectangular slot antenna consists of four two square planar rectangular slot antennas and is circularly polarized through two orthogonal cross coupling slots on the floor to excite the two circular slots. At the same time, Circumcised into a square grounding posts suppress planar antenna surface waves, so as to achieve a planar rectangular slot antenna in the millimeter-wave band of high efficiency. The design and analysis of the antenna in this paper is simulated by CST Microwave Studio software. Through the research on the principle of circular polarization and parameter analysis and optimization, the resulting circular center rectangular waveguide antenna has a circular polarization center frequency of 24.13 GHz, an axial ratio bandwidth of 280 MHz and a reflection loss of better than -20 dB in this frequency band. Antenna Gain of 8.1 dBi.