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Related Concept Videos

Electronic Distance Measuring Instruments01:30

Electronic Distance Measuring Instruments

Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over short distances...

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Related Experiment Video

Updated: Jul 23, 2026

Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
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High-Precision Photonics-Assisted Two-Step Microwave Frequency Measurement Combining Time and Power Mapping Method.

Zhangyi Yang1, Zuoheng Liu1, Yuqing Jiang1

  • 1State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China.

Sensors (Basel, Switzerland)
|October 16, 2024
PubMed
Summary

This study introduces a novel two-step method for photonics-assisted microwave frequency measurement (MFM). It combines frequency-to-time mapping (FTTM) and frequency-to-power mapping (FTPM) for enhanced precision and real-time performance.

Keywords:
frequency measurementfrequency-to-power mappingfrequency-to-time mappingmicrowave photonics

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Area of Science:

  • Photonics and Microwave Engineering
  • Optical Signal Processing

Background:

  • Photonics-assisted microwave frequency measurement (MFM) offers advantages over electronic methods, including wider bandwidth and electromagnetic interference immunity.
  • Existing methods like frequency-to-time mapping (FTTM) and frequency-to-power mapping (FTPM) have limitations in measurement error, range, and signal type compatibility.

Purpose of the Study:

  • To propose a novel two-step MFM method combining FTTM and FTPM.
  • To achieve a balance between real-time performance, measurement precision, and resolution in MFM.
  • To overcome the limitations of existing FTTM and FTPM techniques.

Main Methods:

  • Utilized high-speed optical sweeping and a stimulated Brillouin scattering (SBS) optical filter for the FTTM step.
  • Employed the FTPM principle with additional sampling points for precise measurement after initial FTTM identification.
  • Integrated FTTM and FTPM in a two-step approach for multi-signal identification and high-precision measurement.

Main Results:

  • Demonstrated a system capable of optical sweeping at 20 GHz/μs within the 1-18 GHz range.
  • Achieved a measurement error of less than 10 MHz.
  • Obtained a frequency resolution of 40 MHz.

Conclusions:

  • The proposed two-step MFM method effectively balances real-time performance with high measurement precision and resolution.
  • This hybrid approach enhances the capability for measuring multiple microwave signals compared to standalone FTTM or FTPM.
  • The method shows significant potential for applications in radar and communication systems requiring accurate microwave frequency measurement.