首页> 外文会议>28th AIAA international communications satellite systems conference 2010 >Frequency Scalable, Low Profile, Broadband Quad Fed Patch Element/Array
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Frequency Scalable, Low Profile, Broadband Quad Fed Patch Element/Array

机译:频率可扩展,薄型,宽带四路馈电补丁单元/阵列

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摘要

A novel low profile quad fed square patch element design offering excellent circular polarization performance with simple fabrication techniques for SATCOM applications is presented. The proposed patch element forms the building block for low profile broadband arrays and is frequency scalable to most SATCOM bands. Patch element arrays are easily customized for gain, bandwidth, beam pattern, and polarization requirements. Patch elements are inherently linearly polarized which results in a 3 dB signal loss for circularly polarized waves. Several techniques to produce circular polarization from a patch element have been in practice for over 40 years, but are axial ratio bandwidth limited for broadband applications. The square patch element described in this paper represents a robust design configuration that utilizes a 50 ohm quadrature (0°, 90°, 180°, 270°) network to feed the patch four corners using commercial grade 90° hybrids and 180° dividers, in a small form factor, with excellent circular polarization (< 2 dB axial ratio) over a much broader band than previously reported. The quad fed patch element is then applied to various array configurations for broadband and multi-band SATCOM applications.
机译:提出了一种新颖的薄型四边形方形馈电方形贴片元件设计,该产品具有出色的圆极化性能,并采用简单的制造技术来满足SATCOM应用的需求。所提出的贴片元件构成了低调宽带阵列的基础,并且在频率上可扩展到大多数SATCOM频段。贴片元件阵列易于定制,以满足增益,带宽,光束方向图和偏振要求。贴片元件固有地是线性极化的,这导致圆极化波的信号损失为3 dB。从贴片元件产生圆偏振的几种技术已在实践中使用了40多年,但是轴向比率带宽在宽带应用中受到限制。本文所述的方形贴片元件代表了一种稳健的设计配置,它利用50欧姆正交(0°,90°,180°,270°)网络使用商业级90°混合器和180°分压器为贴片提供四个角,以小巧的外形,在比以前报道的要宽得多的频带上具有出色的圆极化(<2 dB轴向比)。然后将四元馈送的贴片元件应用于宽带和多频带SATCOM应用的各种阵列配置。

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