Reconfigurable 1.5–2.5-GHz phase shifter with 360o relative phase-shift range and reduced insertion-loss variation
Reconfigurable 1.5–2.5-GHz phase shifter with 360o relative phase-shift range and reduced insertion-loss variation
复制标题
可重新配置 1.5–2.5-GHz 移相器，具有 360o 相对相移范围并减少插入损耗变化
DOI：
10.1109/mwsym.2017.8058728
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Chia
中科院分区：
文献类型：
--
作者：
Pei;Chia
本文提出了一种基于变容二极管的反射式移相器，它允许360 °的相对相移范围和减少插入损耗的变化在整个频率调谐范围。特别地，设计了一种新颖且紧凑的可重构90 °耦合器，理论上，它能够在每个调谐状态下实现完美的回波损耗和隔离。因此，当该3 dB耦合器端接两个反射负载时，移相器可以在宽范围的中心频率下工作。此外，提出了一种可调变换网络，以最佳地减少插入损耗的变化范围内的360度连续相移的任何工作频率。实验结果表明，在1.5- 2.5GHz的频率范围内，该移相器可实现360 °的相对相移范围，回波损耗大于16.5dB，插入损耗变化小于3.8dB。
This paper proposes a varactor-based reflection-type phase shifter that allows for 360o relative phase-shift range and reduced insertion-loss variation over the entire frequency tuning range. In particular, a novel and compact reconfigurable 90o coupler is devised and it is, theoretically, able to achieve perfect return loss and isolation at each tuning state. Thus, when this 3-dB coupler is terminated with two reflective loads, the phase shifter can operate at a wide range of center frequencies. Moreover, a tunable transformation network is proposed to optimally reduce the insertion-loss variation within the 360o continuous phase-shift range for any operational frequency. Experimental results show that the fabricated phase shifter, in a frequency range of 1.5–2.5 GHz, can realize 360o relative phase-shift range with greater than 16.5 dB in return loss and less than 3.8 dB in insertion-loss variation.