Wideband Circularly Polarized Cavity-Backed Asymmetric Crossed Bowtie Dipole Antenna
Wideband Circularly Polarized Cavity-Backed Asymmetric Crossed Bowtie Dipole Antenna
复制标题
DOI：
10.1109/lawp.2015.2445939
复制
发表时间：
2016-01-01
影响因子：
4.2
通讯作者：
Park, Ikmo
中科院分区：
文献类型：
--
作者：
Tran, Huy Hung;Park, Ikmo
设计了一种用于宽带无线应用的单馈源、背腔式圆极化(CP)天线。该天线由不对称的交叉弓形振子组成，在阻抗和3分贝轴比(AR)带宽方面实现了宽带特性。采用双空位四分之一印制环进行CP辐射，并与槽模辐射相结合，显著提高了CP的工作带宽。对总尺寸为0.88A lambda(0)，x 0.88 lambda(0)x 0.23 lambda(0)，2.4 GHz的优化天线样机的测试表明，该天线的阻抗带宽约为57%，3dBAR带宽约为51%。此外，在整个工作带宽范围内，获得了宽带平均增益为9.6dBic的单向CP辐射方向图。
A single-feed, cavity-backed, circularly polarized (CP) antenna is designed for wideband wireless applications. The antenna is made up of asymmetric crossed bowtie dipoles and achieves broadband characteristics in terms of impedance and 3-dB axial-ratio (AR) bandwidths. A double vacant-quarter printed ring with orthogonal asymmetric bowties is employed for CP radiation and then combined with slot-mode radiation to significantly enhance the CP operation bandwidth. Measurements of an optimized antenna prototype with an overall size of 0.88A lambda(0), x 0.88 lambda(0) x 0.23 lambda(0),, at 2.4 GHz show that it can yield an impedance bandwidth of approximately 57% and a 3-dB AR bandwidth of approximately 51%. In addition, a unidirectional CP radiation pattern with a high broadside average gain of 9.6 dBic was achieved across the operating bandwidth.