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Wideband circularly polarized antenna with metallic walls for L-band applications
Circuit World ( IF 0.9 ) Pub Date : 2021-07-13 , DOI: 10.1108/cw-10-2020-0271
Mohammad Pourbagher 1 , Changiz Ghobadi 1 , Javad Nourinia 1 , Rahim Naderali 2
Affiliation  

Purpose

To achieve right-hand circular polarization (RHCP), a 3-dB Wilkinson power divider with a λ/4 phase shifter is used. The crossed-dipoles are placed at almost λ/4 elevation on the ground plane and connected to two coaxial cables. Experiments show that the impedance bandwidth of 49.40% (913.7–1,513.1 MHz) and axial ratio bandwidth (ARBW) of 22.88% (1,145.8–1,441.8 MHz) are achieved.

Design/methodology/approach

In this study, a wideband crossed-dipole antenna with circularly polarized (CP) radiation for L-band satellite and radar applications is presented. The proposed CP antenna comprises two orthogonally placed printed dipoles, a quadrature coupler and a box-shaped ground plane.

Findings

Furthermore, by fixing the box-shaped ground plane under the radiators, 5.13 dBic RHCP peak gain at 1,300 MHz and maximum half-power beamwidth (HPBW) of 84.5° at 1,170 MHz are realized for the antenna.

Originality/value

Eight metallic walls are connected to four corners of the substrate to stabilize the radiation properties in this study. Results show that the ARBW and front-to-back ratio are improved and the maximum HPBW around 127° across the operating frequency band is achieved. The proposed CP antenna is a good candidate for Global Positioning System (GPS) L2 (1.227 GHz), GPS L5 (1.176 GHz) and air route surveillance radar system at 1,215–1,390 MHz frequency band.



中文翻译:

用于 L 波段应用的带金属壁的宽带圆极化天线

目的

为实现右旋圆极化 (RHCP),使用了带有 λ/4 移相器的 3 dB 威尔金森功率分配器。交叉偶极子放置在接地平面上几乎 λ/4 仰角处,并连接到两根同轴电缆。实验表明,实现了 49.40% (913.7–1,513.1 MHz) 的阻抗带宽和 22.88% (1,145.8–1,441.8 MHz) 的轴比带宽 (ARBW)。

设计/方法/途径

在这项研究中,提出了一种用于 L 波段卫星和雷达应用的具有圆极化 (CP) 辐射的宽带交叉偶极子天线。所提出的 CP 天线包括两个正交放置的印刷偶极子、一个正交耦合器和一个盒形接地平面。

发现

此外,通过在辐射器下方固定盒形地平面,天线在 1,300 MHz 时实现了 5.13 dBic RHCP 峰值增益和 1,170 MHz 时 84.5° 的最大半功率波束宽度 (HPBW)。

原创性/价值

八个金属壁连接到基板的四个角,以稳定本研究中的辐射特性。结果表明,ARBW 和前后比得到改善,并且在整个工作频带内实现了约 127° 的最大 HPBW。拟议的 CP 天线是全球定位系统 (GPS) L2 (1.227 GHz)、GPS L5 (1.176 GHz) 和 1,215–1,390 MHz 频段的航路监视雷达系统的理想选择。

更新日期:2021-07-13
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