A Ka-band indium-antimonide junction circulator
A Ka-band indium-antimonide junction circulator
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Ka波段铟锑结环行器
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
L. Davis
中科院分区：
文献类型：
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作者：
C. K. Yong;R. Sloan;L. Davis
下面的基本理论的简要概述，实验结果首次显示在半导体结结构中的环行器动作。一个轴向磁化的锑化铟盘固定在一个三端口鳍线结构，并冷却到沸腾的氮气的温度，77 K提供循环通过K/spl α/-带。对于0.73 T的直流磁偏置，在28至40 GHz范围内记录15 dB隔离，或至少35%的分数带宽。在测试夹具端口处，从WG 22参考平面开始的典型插入损耗小于1.5 dB。预计将继续在40 GHz以上工作，但尚未测量。测量表明，即使有效传播常数是虚数，环流也是明显的，尽管当这是一个真实的量时，理论上的一致性更好。这种新的装置使毫米波宽带循环成为可能，并证实了目前的模型的基础上德鲁德-齐纳近似。一个理论的例子，然后给出了一个设计工作到140 GHz，产生110%的分数带宽。
Following a brief overview of the underlying theory, experimental results are presented for the first time showing circulator action in a semiconductor junction structure. An axially magnetized indium-antimonide disc fixed in a three-port finline structure and cooled to the temperature of boiling nitrogen, 77 K gives circulation across K/spl alpha/-band. For a dc magnetic bias of 0.73 T, a 15-dB isolation is recorded from 28 to 40 GHz, or a fractional bandwidth of at least 35%. Typical insertion loss is less than 1.5 dB from the WG22 reference plane at the test fixture ports. Continued operation above 40 GHz is predicted, but has not yet been measured. Measurement suggests that circulation is evident even where the effective propagation constant is imaginary, although better theoretical agreement is achieved when this is a real quantity. This new device makes millimeter-wave broad-band circulation a possibility and confirms the current model based upon the Drude-Zener approximation. A theoretical example is then given for a design operating to 140 GHz, yielding a fractional bandwidth of 110%.