新型X波段圆极化介质谐振器天线

Novel X-band circularly polarized dielectric resonator antenna

摘要:

提出了一种工作于X波段的新型圆极化矩形介质谐振器天线。该天线是一块矩形介质谐振器嵌入到介质基板中并通过U型微带线激励。天线的接地面采用缺陷地的结构，可以通过调节该缺陷地对角的大小来产生2个正交模式实现圆极化，有效解决了一些圆极化天线馈电网络复杂的缺点。所设计天线的阻抗带宽为8.88~10.22 GHz。天线的轴比带宽为9.56~9.92 GHz，可应用于卫星广播、航空无线电导航业务和无线电定位。

Abstract:

A novel circularly polarized rectangular dielectric resonator antenna operating at X band is proposed. The antenna is constructed by housing a rectangular dielectric resonator into the dielectric substrate, and is excited by an U shaped microstrip feed line. The ground plane of the antenna adopts Defected Ground Structure(DGS) that can be adjusted by the size of the corners of the defected structure to produce two orthogonal modes and achieve circular polarization, which effectively decreases the complexity of feed networks for some circularly polarized antennas. The simulated impedance bandwidths are 8.88-10.22 GHz and axial ratio bandwidths are 9.56-9.92 GHz, which suit for satellite broadcasting, aeronautical radio navigation service, and radio positioning.