A Compact Wideband Circularly Polarized Antenna Array for C-band Applications
A Compact Wideband Circularly Polarized Antenna Array for C-band Applications
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DOI：
10.1109/lawp.2015.2392387
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发表时间：
2015-01-01
影响因子：
4.2
通讯作者：
Maddio, Stefano
中科院分区：
文献类型：
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作者：
Maddio, Stefano
在这封信中，我们提出了一个紧凑的单层微带天线阵列的应用在C波段。该器件的设计和制造总体积为45 mm x 45 mm x 1.6 mm（在5.75 GHz频率下为0.86 lambda（0）x 0.86 lambda（0）x 0.03 lambda（0）），这是一个适合紧凑型手持设备的尺寸。所提出的阵列是基于一个修改的顺序相位网络，由非均匀弯曲的传输线，馈送一组2 × 2的圆盘贴片元件。建议的网络具有空间填充特性，并安排在未占用的区域之间的元素，最大限度地减少整体尺寸，而不牺牲工作带宽。仿真和测量结果之间的充分协议验证了所提出的设计：一个3 dB的轴比带900 MHz，意味着15.5%，8.25 dB的峰值增益保持在3 dB的1.2 GHz，和一个非常宽的10 dB回波损耗带宽为29%。对于给定的尺寸约束，这种性能是单层无通孔技术无法比拟的。
In this letter, we present a compact single-layer microstrip antenna array for applications in the C-band. The device is designed and fabricated with an overall volume of 45 mm x 45 mm x 1.6 mm, (0.86 lambda(0) x 0.86 lambda(0) x 0.03 lambda(0) at a frequency of 5.75 GHz), a suitable dimension for compact handhelds. The proposed array is based on a modified sequential phase network, composed of nonuniform curved transmission lines, feeding a set of 2 x 2 disc based patch elements. The proposed network has space-filling properties, and is arranged in the unoccupied area between the elements, minimizing the overall dimensions without sacrificing the operating bandwidth. Adequate agreements between the simulated and measured results validate the proposed design: a 3-dB axial ratio band of 900 MHz, meaning 15.5%, a peak gain of 8.25 dB maintained within 3 dB for 1.2 GHz, and a very wide 10-dB return loss bandwidth of 29%. This performance is unmatched for the given dimensional constraint with a single-layer via-less technology.