稳健性(进化)
光学
微波食品加热
频率调制
频域
计算机科学
包络检波器
光探测
时频分析
无线电频率
物理
电子工程
雷达
电信
放大器
光电探测器
带宽(计算)
生物化学
计算机视觉
基因
工程类
化学
作者
Guodong Wang,Qingqing Meng,Yong Jun Li,Xuan Li,Yixiao Zhou,Zihang Zhu,Congrui Gao,Li He,Shanghong Zhao
出处
期刊:Optics Letters
[The Optical Society]
日期:2023-01-26
卷期号:48 (5): 1172-1172
被引量:14
摘要
A multiple microwave frequency measurement approach based on frequency-to-time mapping (FTTM) is reported. The FTTM is constructed by optical sideband sweeping and electric-domain intermediate frequency envelope monitoring. Two optimized operations are implemented. First, the use of balanced photodetection cancels out the beat components generated by the signals under test (SUT) themselves, so as to exclude frequency misjudgment. Second, a reference signal is introduced to map the SUT frequency to a relative time difference instead of an absolute time value, avoiding the measuring bias caused by time synchronization. As a result, the proposed scheme with improved robustness could be attractive for future practical applications. An experiment is performed. Microwave frequency measurement from 16 to 26 GHz is demonstrated, with an average error of 7.53 MHz.
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