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首页> 外文期刊>IEEE Transactions on Industrial Electronics >Highly Reconfigurable Dual-Band Coupler With Independently Tunable Operating Frequencies
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Highly Reconfigurable Dual-Band Coupler With Independently Tunable Operating Frequencies

机译：高度可重新配置的双频耦合器，具有独立可调的工作频率

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摘要

To support different standards simultaneously within a wireless communication system, research on dual-/multi-band components has been conducted extensively. However, the operating frequencies of existing works are usually fixed resulting in a low flexibility. To solve this problem, a highly reconfigurable coupler whose two operating frequencies can be controlled independently is proposed for the first time in this paper. Based on the analysis of a basic configuration, the conditions for realizing the desired independent frequency tuning can be obtained. To realize this unique property, varactors loaded coupled line sections are introduced on a conventional branch line coupler. Owing to the symmetrical structure of the proposed coupler, explicit theoretical analysis can be conducted. For demonstration, two reconfigurable couplers are designed, fabricated, and measured. The first coupler can provide frequency tunability from 3.4 to 4.2 GHz at the upper band with the lower band fixed at 2.4 GHz. The other one can not only provide a tunable frequency from 1.3 to 1.6 GHz at the lower band with the higher band fixed at 3.4 GHz, but also give a tunable higher band from 2.9 to 3.4 GHz with the lower band fixed at 1.55 GHz. The measured results agree well with the simulated results, validating the proposed design methodologies.
机译：为了在无线通信系统中同时支持不同的标准，已经对双/多频带组件进行了广泛的研究。但是，现有作品的工作频率通常是固定的，导致灵活性较低。为了解决这个问题，本文首次提出了一种可重配置的耦合器，其两个工作频率可以独立控制。基于对基本配置的分析，可以获得用于实现期望的独立频率调谐的条件。为了实现这种独特的性能，在传统的支线耦合器上引入了装有变容二极管的耦合线段。由于所提出的耦合器的对称结构，可以进行明确的理论分析。为了演示，设计，制造和测量了两个可重新配置的耦合器。第一耦合器可以在较高频段提供3.4至4.2 GHz的频率可调性，而较低频段固定为2.4 GHz。另一个不仅可以在较低的频带上提供1.3至1.6 GHz的可调频率，而较高的频带固定在3.4 GHz，也可以在2.9至3.4 GHz的频带上提供可调的较高频带，而较低的频带固定在1.55 GHz。测量结果与仿真结果吻合良好，验证了所提出的设计方法。

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