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Compact Rectifiers With Ultra-wide Input Power Range Based on Nonlinear Impedance Characteristics of Schottky Diodes
IEEE Transactions on Power Electronics ( IF 6.7 ) Pub Date : 2020-12-21 , DOI: 10.1109/tpel.2020.3046083
Zhongqi He , Jing Lan , Changjun Liu

Two high-efficiency radio-frequency (RF) rectifiers with extended input power range are proposed by taking the advantage of nonlinear impedance characteristics of diodes. Each rectifier consists of two subrectifiers that operates at high- and low-power levels, respectively. A nonlinear power division strategy is applied to the input power level without any power dividers or couplers. A λ /8 transmission line is introduced to compensate the imaginary part of diode impedance. A λ /4 transmission line is applied to reverse the diode impedance variation with respect to the input power. Two rectifiers operating at 2.45 GHz are fabricated and measured. Rectifier I shows a RF-dc power conversion efficiency exceeding 50% over an input power range of 23.3 dB (from 6.5 to 29.8 dBm), with maximum efficiency 74.5% at 27 dBm input power. Rectifier II shows an input power range exceeding 50% over 31 dB (−1 to 30 dBm) with maximum efficiency of 68.5% at 28 dBm.

中文翻译:

基于肖特基二极管非线性阻抗特性的超宽输入功率范围紧凑型整流器

利用二极管的非线性阻抗特性,提出了两种扩展了输入功率范围的高效射频整流器。每个整流器由两个分别在高功率和低功率级别下运行的子整流器组成。非线性功率分配策略应用于输入功率电平,而无需任何功率分配器或耦合器。一种λ 引入了/ 8传输线以补偿二极管阻抗的虚部。一种λ 施加了/ 4条传输线以使二极管阻抗相对于输入功率的变化反向。制作并测量了两个工作在2.45 GHz的整流器。整流器I显示在23.3 dB(从6.5到29.8 dBm)的输入功率范围内,RF-dc功率转换效率超过50%,在27 dBm输入功率下的最大效率为74.5%。整流器II的输入功率范围超过31 dB(-1至30 dBm)超过50%,在28 dBm时的最大效率为68.5%。
更新日期:2020-12-21
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