0.34 THz肖特基二极管高速OOK信号直接检波器

为了满足340 GHz高速OOK无线通信的需求，完成了340 GHz零偏置波导检波器的设计、加工和测试。首先，在高频电磁仿真软件HFSS中对准垂直结构二极管（QVD）进行建模仿真，并结合二极管的非线性模型确定二极管的阻抗；随后设计了输入波导-微带转换以及低通滤波器等无源结构，并同时对二极管进行阻抗匹配；最后进行了检波器的加工和测试。测试结果表明该检波器的电压灵敏度在334 GHz时最佳，最大值为2 210 V/W，并且在315 GHz~357 GHz频率范围内的典型值为1 400 V/W，其对应的等效噪声功率典型值为5 pW Hz-0.5。最后，还利用该检波器进行了340 GHz频段的高速OOK信号接收实验，结果表明，该检波器能够近乎无误地检测10 Gbps的OOK信号，并且在OOK信号速率为15 Gbps时，检波器解调得到的误码率为3.1510-7，证明了该检波器的高速信号检测能力能够满足高速OOK无线通信系统的需求。

0.34 THz high speed on-off keying (OOK) signal direct detector based on Schottky diode

To meet the requirement of high speed OOK wireless communication, a 340 GHz waveguide zero-bias detector was designed, fabricated and measured. Firstly, high frequency electromagnetic software HFSS was adopted to establish the accurate model of the quasi vertical diode (QVD) according to its physical structure, from which impedance of the diode could be extracted with the nonlinear equivalent model of the diode. Then, passive circuits such as waveguide to microstrip transition structure and lowpass filter (LPF) were designed, which also had the function of impedance match. Finally, the designed detector had been fabricated and measured. The measured results show that the detector has a peak responsivity of 2 210 V/W at 334 GHz and a typical responsivity of 1 400 V/W over the frequency range from 315 to 357 GHz,with a typical noise equivalent power of 5 pWHz-0.5. At last, the proposed detector was selected to carrier out the 340 GHz high speed OOK signal demodulation experiment. And results show a bit error rate (BER) below 10-12 at 10 Gb/s and a bit error rate (BER) of 3.1510-7 at data rate up to 15 Gb/s at room temperature, which proves that the detector can well meet the requirement of high data rate OOK communication system.