A 275 GHz Active Vector-Sum Phase Shifter
A 275 GHz Active Vector-Sum Phase Shifter
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275 GHz 有源矢量和移相器
DOI：
10.1109/lmwc.2014.2382655
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发表时间：
2015
影响因子：
3
通讯作者：
M. Kim
中科院分区：
文献类型：
--
作者：
C. Quan;S. Heo;M. Urteaga;M. Kim
介绍了在240 ~ 310 GHz频率范围内实现360°相位控制的太赫兹矢量和移相器。由于移相器中采用的可变增益放大器的阻抗失配决定了偏移相位的平坦度，因此引入了一种新的宽带VGA设计，其输入和输出阻抗不受直流偏置的影响。对采用0.25 μ mInPHBT工艺制作的移相器的测试结果表明，在8种基本直流偏置状态下，相移增量为45°，平均均方根偏移相位误差为3.6°，插入损耗为-1 ~-13dB。
Terahertz vector-sum phase shifters capable of 360° phase control over the frequency range of 240 to 310 GHz are presented. Because the impedance mismatch of the variable-gain amplifiers employed in the phase shifter determines the flatness of the offset phases, a new broadband VGA design with its input and output impedances unaffected by dc bias is introduced. The measured results on the phase shifter fabricated using 0.25 μm InP HBT technology show incremental phase shifts of 45° with an average RMS offset phase error of 3.6° and insertion loss of -1 to -13 dB for eight basis dc bias states.