Terahertz Performance of Integrated Lens Antennas With a Hot-Electron Bolometer
Terahertz Performance of Integrated Lens Antennas With a Hot-Electron Bolometer
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DOI：
10.1109/tmtt.2006.889153
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发表时间：
2007-02
影响因子：
4.3
通讯作者：
A. Semenov;H. Richter;H. Hubers;B. Gunther;A. Smirnov;K. Il'in;M. Siegel;J. Karamarković
中科院分区：
文献类型：
--
作者：
A. Semenov;H. Richter;H. Hubers;B. Gunther;A. Smirnov;K. Il'in;M. Siegel;J. Karamarković
实验研究了对数螺旋、对数周期和双缝平面馈电与热电子测辐射热计耦合的集成透镜天线在1~6 THz频率范围内的辐射耦合效率和定向特性，并与基于矩量法和物理光学光线追踪法的模拟结果进行了比较。对于所有被研究的天线，只有在显式考虑测辐射热计的复阻抗的情况下，耦合效率的谱关系模型才能与傅里叶变换光谱和噪声温度测量获得的实验数据吻合。在高频下，集成天线的辐射方向图表现出比天线模型预测的更高的旁瓣。
Radiation coupling efficiency and directive properties of integrated lens antennas with log-spiral, log-periodic, and double-slot planar feeds coupled to a hot-electron bolometer were experimentally studied at frequencies from 1 to 6 THz and compared with simulations based on the method of moments and physical-optics ray tracing. For all studied antennas, the modeled spectral dependence of the coupling efficiency fits to the experimental data obtained with both Fourier transform spectroscopy and noise temperature measurements only if the complex impedance of the bolometer is explicitly taken into account. At high frequencies, the radiation pattern of integrated antennas exhibits sidelobes, which are higher than those predicted by the antenna model