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在对肖特基二极管等效电路模型精确建模的基础上,设计并制作了W波段宽带高灵敏度功率检波器。根据Ga As低势垒肖特基二极管的物理结构,建立了二极管等效电路模型,并通过对W波段检波器试验模块的研制和测试提取了准确的电路模型参数。最后,针对宽带工作要求,根据二极管等效电路模型,优化了射频阻抗匹配网络,使检波器工作频率能够覆盖78~98 GHz。测试结果表明,当输入功率为-30 d Bm时,82 GHz处检波灵敏度达到了7000 m V/m W,78~98 GHz范围内检波灵敏度高于1500 m V/m W,实测正切灵敏度优于-36 d Bm。实测和仿真结果一致,验证了二极管等效电路模型的准确性。
Based on the accurate modeling of Schottky diode equivalent circuit model, a W-band broadband high-sensitivity power detector is designed and fabricated. According to the physical structure of GaAs low-barrier Schottky diode, a diode equivalent circuit model is established, and accurate circuit model parameters are extracted through the development and testing of the W-band detector test module. Finally, according to the requirements of broadband work, according to the diode equivalent circuit model, the RF impedance matching network is optimized so that the operating frequency of the detector can cover 78-98 GHz. The test results show that the detection sensitivity at 82 GHz reaches 7000 mV / m W when the input power is -30 d Bm, and the detection sensitivity is higher than 1500 mV / m W at 78-98 GHz. The measured tangential sensitivity is better than -36 d Bm. The measured results agree well with the simulation results, which verify the accuracy of diode equivalent circuit model.