Novel Structure and the Characteristics of a Microwave Circular Polarization Antenna
Novel Structure and the Characteristics of a Microwave Circular Polarization Antenna
复制标题
微波圆极化天线的新颖结构及特点
DOI：
--
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
A. Fukasawa
中科院分区：
文献类型：
--
作者：
Y. Takizawa;A. Fukasawa
给出了X波段圆极化天线的一种新结构。这种天线是由一个馈电元件和一个电抗元件在一个宽接地板上组成的平面天线。进给元件由沿x轴在两侧线性切割的圆盘制成。谐振频率分别为沿x轴和y轴的fh和fl。退化是通过将共振频率移位到对应于沿x轴和y轴的共振长度的fh>；f1来实现的。通过定义馈电点的位置，为具有电流Il和Ih的圆极化提供π/2相位差。电抗元件由比馈电元件小的圆盘制成。这种元件扩展了共振的带宽fh-f1，从而带来了圆偏振的有效带宽的扩展。在10 GHz频段实现了带宽为0.7 GHz的圆极化平面天线，在5~15 GHz范围内无杂散辐射。
This paper gives a novel structure of circular polarization antenna at the X-band. This antenna is made as plane antenna composed of a feed- and a reactance-elements on a wide ground plate. The feed element is made by a circular disc cut linearly at the both sides along x-axis. The resonant frequencies are fH and fL along x- and y- axes respectively. Degeneration is achieved by shifting the resonant frequencies to be fH > fL which correspond to resonant lengths along x- and y- axes. By defining the position of the feeding point, π/2 phase difference is provided for circular polarization with the current iL and iH. The reactance element is made of a circular disk smaller than the feed element. This element expands the bandwidth fH - fL of resonances, which brings expansion of effective band width of circular polarization. A circular polarization plane antenna with 0.7 GHz bandwidth was realized at 10GHz without spurious radiation between 5 ~ 15GHz.