太赫兹科学与电子信息学报, 2019, 17 (1): 79, 网络出版: 2019-04-07
一种紧凑型宽带高效微波整流电路
A compact and wideband microwave rectifier with high-efficiency
微波无线能量传输 宽带整流电路 谐波抑制 源牵引 高效率 microwave power transmission wideband microwave rectifier harmonic termination source-pull high efficiency
摘要
运用终端短路微带线实现无输入低通滤波器的微波整流电路。该结构串联于整流二极管与地之间,抵消了整流二极管在基频时的容性阻抗,并抑制了谐波电流,因此该整流电路移除了输入低通滤波器和匹配电路,结构和尺寸更加紧凑。理论分析和实验测试表明,本设计在较大输入功率、频率范围内实现了高效整流。实验结果表明,在输入功率12~24 dBm和频率1.48~ 2.02 GHz范围内,整流效率超过70%。当输入功率为21.8 dBm,频率为1.8 GHz时,最高整流效率为83.3%。电路尺寸优于15 mm×20 mm。
Abstract
A novel microwave rectifier with a short-ended eighth-wavelength microstrip transmission line in series with a Schottky diode is presented. The input low-pass filter in conventional rectifiers is removed to improve the conversion efficiency and reduce the size of the rectifier. In the proposed shunt diode topology, a short-ended transmission line is inserted between the diode’s cathode and Ground(GND), which balances the capacitive impedance of the diode at the fundamental frequency. As a result, both the input low-pass filter and the impedance matching circuit are removed. Results show that it can realize high conversion efficiency with a wide input power and frequency range. The measured efficiency keeps above 70% while the input power varies from 12 dBm to 24 dBm, and the frequency bandwidth extends to a range from 1.5 GHz to 2.1 GHz. The maximum rectifying efficiency of 83.3% at 21.8 dBm input power is obtained. The fabricated rectifier has a compact dimension of 15 mm×20 mm.
张磊, 武鹏德, 赵应盛, 刘长军. 一种紧凑型宽带高效微波整流电路[J]. 太赫兹科学与电子信息学报, 2019, 17(1): 79. ZHANG Lei, WU Pengde, ZHAO Yingsheng, LIU Changjun. A compact and wideband microwave rectifier with high-efficiency[J]. Journal of terahertz science and electronic information technology, 2019, 17(1): 79.