一种高效的大功率宽带整流电路

A high efficiency high power wideband rectifier circuit

摘要:

提出了一种由π型匹配枝节、整流二极管、直通滤波器组成的高效大功率宽带整流电路。采用2只HSMS-282P肖特基二极管桥设计单级倍压整流电路，使电路在整流效率不下降的情况下提升输入的功率容量；采用π型匹配枝节实现阻抗匹配，使电路具有宽频特性，同时其并联短路枝节可以作为输入滤波器，实现小型化和整流效率的提高。直通滤波器用于抑制基频和二极管非线性产生的高次谐波，以提高整流效率。实测结果表示：在2.05~2.6 GHz带宽内整流效率大于60%；在2.45 GHz工作频率和35 dBm输入功率下，整流电路在330 Ω负载上获得70%的整流效率。该整流电路具有整流效率高、功率容量大、频带宽的特性，可为工程人员设计大功率微波整流电路提供设计指导。

Abstract:

A rectifier circuit composed of matching branches, rectifier diodes and DC-pass filters is presented, which is characterized by high efficiency, large power capacity and broadband. Two HSMS-282P Schottky diode bridges are utilized to design a single-stage voltage doubling rectifier circuit, which increases the input power capacity without decreasing the efficiency. The π type matching branch is adopted to realize the impedance matching, making circuit bear the characteristics of broadband. The short circuits in parallel can be used as the input filter, achieving miniaturization and improvement of the rectification efficiency. The DC-pass filter is employed to suppress the fundamental frequency and higher harmonics to improve the rectification efficiency. The measured results show that the rectification efficiency is greater than 60% within the bandwidth of 2.05~2.6 GHz. Working in the 2.45 GHz frequency and 35 dBm power input, the rectifier circuit in 330 Ω load wins 70% of the rectifier efficiency. The rectifier circuit has the characteristics of high rectification efficiency, large power capacity and wide frequency band, which can provide design guidance for designing high power microwave rectifier circuit.