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肖特基二极管技术为常温下毫米波信号的检测提供了有效的解决方案。它具有极低的寄生电容和级联电阻,可用于该频段的倍频器、混频器和检波器当中。相比于Galey Cell和热辐射测定器(Bolometer),基于肖特基二极管的直接检波技术具有低噪声、高反应率和常温使用的特点。本文介绍了一种基于波导结构的零偏置肖特基二极管检波器,采用E面探针传输波导基模电磁波,通过阻抗匹配实现微带线到二极管的耦合。测试结果表明,在-30 d Bm输入功率下:电压反应率的峰值可达8 900 V/W;在75 GHz~105 GHz的频率范围内,电压反应率在1 000 V/W以上。
Schottky diode technology for the detection of millimeter-wave signals at room temperature provides an effective solution. It has very low parasitic capacitance and cascode resistance, which can be used in the frequency multiplier, mixer and detector. Compared to the Galey Cell and Bolometer, the Schottky diode-based direct detection technology offers low noise, high response rates, and room temperature use. In this paper, a zero offset Schottky diode detector based on waveguide structure is introduced. E - plane probe is used to transmit waveguide fundamental electromagnetic wave and the microstrip line to diode is coupled through impedance matching. The test results show that at a -30 d Bm input power, the peak voltage response can reach 8 900 V / W and the voltage response can be above 1000 V / W over a 75 GHz to 105 GHz frequency range.