不同变容器模型对天线可调性的影响

2017 International Conference on High Performance Computing & Simulation (HPCS) Pub Date : 2017-07-01 DOI:10.1109/HPCS.2017.50

M. Madi, K. Kabalan, M. Al‐Husseini

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引用次数: 3

摘要

本文解释了为什么天线可以通过跨槽安装变容二极管来实现有限的频率可调性。原因是大多数变容管都有一个与变容并联的电阻。电阻主要作为短路，因此变容管在低频~ 2 GHz时失去其容性行为。在较高的频率下，变容管保持其电容效应。对变容管的各种配置进行了仿真和计算，研究了电容、电阻和串联电感对变容管可调性和容阻抗的影响。模拟中使用雪松形天线[1]，因为它具有放置变容管的多种可能性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Effect of Different Varactor Models on Antenna Tunability

This paper explains why antennas can achieve limited frequency tunability by mounting varactor diodes across slots. The reason is that majority of varactors have a resistance in parallel to the variable capacitor. Resistance mainly acts as a short and thereby the varactor loses its capacitive behavior at low frequencies ∼ 2 GHz. At higher frequencies, the varactor retains its capacitive effect. Simulations and calculations are done for various configurations of the varactor to investigate the effect of capacitance, resistance and series inductance on tunability and on the capacitive impedance of the varactor. A cedar shape antenna [1] is used in simulations, as it possesses many possibilities for placing the varactors.

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2017 International Conference on High Performance Computing & Simulation (HPCS)

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