System and method of measuring the frequency of a radio frequency signal

US11656259B1 · kind B1 · utility

Assignee

• NORTH UNIVERSITY OF CHINA · CN

Inventors

• Jun Liu · Shanghai, CN
• Zongmin Ma · Taiyuan, CN
• Jun Tang · Beijing, CN
• Yunbo Shi · Taiyuan, CN
• Hao Guo · Taiyuan, CN
• Zhonghao Li · Taiyuan, CN
• Xiaocheng Wang · Shandong, CN
• Junzhi ZHAO · Taiyuan, CN
• Doudou Zheng · Taiyuan, CN
• Qimeng Wang · Taiyuan, CN

Key dates

• Filing date: Mar 14, 2022
• Grant date: May 23, 2023
• Expiry date: Mar 14, 2042

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R29/0871
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A frequency measurement system and method of a radio frequency (RF) signal. The frequency measurement system includes: a magnetic field source module, a light source module, an excitation module, a complementary metal-oxide-semiconductor (CMOS) camera, and a signal processing module; the excitation module is disposed in the magnetic field; the excitation module is disposed on an output light path of the light source module; the CMOS camera is disposed on an output light path of the excitation module; and the CMOS camera is connected to the signal processing module; the light source module is configured to emit a laser; the CMOS camera is configured to capture an excitation image when the laser enters the excitation module to which a to-be-tested RF signal is applied; and the signal processing module is configured to determine a frequency of the to-be-tested RF signal according to the excitation image.