Circularly polarized broadside beam radiated from a large, low-profile metaloop antenna
Circularly polarized broadside beam radiated from a large, low-profile metaloop antenna
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从大型薄型金属环天线辐射出的圆偏振侧射波束
DOI：
10.1109/tap.2022.3210263
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发表时间：
2023
影响因子：
5.7
通讯作者：
J. Yamauchi
中科院分区：
文献类型：
--
作者：
H. Nakano;T. Abe;J. Yamauchi
环形天线内的区域可以用于插入额外的组件（如安装硬件），如果这不会导致天线特性下降。本文讨论了一种圆极化（CP）元环天线，其环路周长为1，从而在环路内形成大面积，其中（）和（）分别为环路上电流的引导波长和自由空间波长。本文中使用的范围内的传播相位常数的值。研究发现，用于、4和5的元环天线产生的CP宽边波束（轴向波束）的增益带宽分别约为6%、5%和4%。跨gbw的驻波比小于2，轴比小于3db。4、5的辐射效率分别约为48%、69%和83%。当在这些元环天线中插入导电盘（作为附加组件存在的概括）时，天线特性不会下降，直到磁盘和元环非常接近（接近耦合发生）。
The area within a loop antenna can be used for inserting additional components (such as mounting hardware) if this does not cause the antenna characteristics to degrade. This article discusses a circularly polarized (CP) metaloop antenna that has a loop circumference ofwith, thereby creating a large area within the loop, where() and() are the guide wavelength of the current on the loop and the free-space wavelength, respectively. Values for the propagation phase constant within the range ofare used in this article. It is found that metaloop antennas for, 4, and 5 generate a CP broadside beam (axial beam) with gain bandwidths (GBWs) of approximately 6%, 5%, and 4%, respectively. The VSWR across the GBWs is less than two and the axial ratio is less than 3 dB. The radiation efficiencies for, 4, and 5 are approximately 48%, 69%, and 83%, respectively. When a conducting disk (as a generalization for the presence of additional components) is inserted into these metaloop antennas, the antenna characteristics are not degraded until the disk and the metaloop are in close proximity (proximity coupling occurs).