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Specific Resonant Properties of Non-Symmetrical Microwave Antennas

机译：非对称微波天线的具体共振特性

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摘要

The aircraft avionics modernization process often requires optimization of the aircraft itself. Scale models of aircraft and their antennas are frequently used to solve this problem. Here we present interesting properties of the resonant antennas, which were discovered serendipitously during the measurement process of some microwave antennas’ models as part of an aircraft modernization project. Aircraft microwave antennas are often designed as non-symmetric flat microwave antennas. Due to their thin, low and longitudinally elongated outer profile, they are also called tail antennas. An analysis of the resonant properties of non-symmetric antennas was performed in the band from 1 GHz to 4 GHz. The length of the antenna models ranged from 2 cm to 7 cm. The width of the antennas, together with the thickness of the strip, was always a constant parameter for one measured set of six antennas. In the measurement and subsequent analysis, attention was focused on the first-series resonant frequency (λ/4) of each antenna. During the evaluation of the resonance parameters, the flat microwave antenna models showed specific resonant properties different from those of conventional cylindrical microwave antennas. This article aims to inform professionals about these unknown specific properties of non-symmetrical antennas. The results of experimental measurements are analyzed theoretically and then visually compared using graphs so that the reader can more easily understand the properties observed. These surprising observations open up some new possibilities for the design, implementation, and use of flat microwave antennas, as found in modern aircraft, automobiles, etc.
机译：飞机航空电子技术现代化过程通常需要优化飞机本身。飞机和天线的规模模型经常用于解决这个问题。在这里，我们呈现了谐振天线的有趣特性，这些属性在一些微波天线模型的测量过程中被发现，作为飞机现代化项目的一部分。飞机微波天线通常设计为非对称平面微波天线。由于它们薄，低且纵向细长的外形，它们也称为尾部天线。在从1GHz到4 GHz的条带中执行对非对称天线的共振特性的分析。天线模型的长度范围为2厘米至7厘米。天线的宽度与条带的厚度一起始终是一个测量的六个天线的恒定参数。在测量和随后的分析中，注意力集中在每个天线的第一系列谐振频率（λ/ 4）上。在评估谐振参数期间，平坦的微波天线模型显示出与传统圆柱形微波天线不同的特定共振特性。本文旨在通知专业人员关于非对称天线的这些未知的特定属性。理论上分析实验测量结果，然后使用曲线图进行视觉比较，使得读者可以更容易地理解观察到的性质。这些令人惊讶的观察开辟了扁平微波天线的设计，实施和使用的一些新的可能性，如现代飞机，汽车等。

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