Design of miniaturised printed quadrifilar helix antenna with isoflux coverage and wide-angle circular polarisation
Design of miniaturised printed quadrifilar helix antenna with isoflux coverage and wide-angle circular polarisation
复制标题
等通量覆盖广角圆极化小型印刷四线螺旋天线设计
DOI：
10.1049/mia2.12188
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发表时间：
2021
影响因子：
1.7
通讯作者：
Wang Zhongbao
中科院分区：
文献类型：
--
作者：
Liu Hongmei;Luo Bin;Wang Jiahui;Fang Shaojun;Wang Zhongbao
在这项研究中，提出了一种具有等通量覆盖和广角圆极化的小型化印刷四线螺旋天线（PQHA）。它是由一个三级阶梯阻抗螺旋臂和开放式存根组成。每一个三级螺旋臂有不同的螺距和匝数。对于最后一级螺旋臂，采用弯曲线。所提出的PQHA具有宽带宽、等通量辐射、小尺寸和广角圆偏振等特点。此外，为了馈送所提出的PQHA，设计了一个小型化的四馈网络，以提供具有顺序正交相位的等幅信号。为了演示，设计、制造和测量了一个原型。天线整体尺寸为88 × 88 × 132 mm （0.44λ0× 0.44λ0× 0.66λ0）。结果表明，在1.40 ~ 1.62 GHz（14.6%）范围内实现了±60°的等通量辐射，同时保持了大于10 dB的回波损耗和大于200°3‐dB的轴比波束宽度。
In the study, a miniaturised printed quadrifilar helix antenna (PQHA) with isoflux coverage and wide‐angle circular polarisation is presented. It is composed of a three‐stage stepped impedance spiral arm and open stubs. Each of the three‐stage spiral arms has different pitches and number of turns. For the last‐stage spiral arm, meander lines are used. The proposed PQHA features the characteristics of wide bandwidth, isoflux radiation, small size, and wide‐angle circular polarisation. Moreover, in order to feed the proposed PQHA, a miniaturised quad‐feed network is designed to provide equal amplitude signals with sequential orthogonal phases. For demonstration, a prototype is designed, fabricated, and measured. The overall size of the proposed antenna is 88 × 88 × 132 mm (0.44λ0× 0.44λ0× 0.66λ0). The results show that isoflux radiation with a coverage of about ±60° is realised from 1.40 to 1.62 GHz (14.6%) while maintaining more than 10 dB return loss and larger than 200° 3‐dB axial ratio beamwidth.