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IR Frequency Region: Fingerprint Region01:03

IR Frequency Region: Fingerprint Region

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IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the...
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Fully Integrated 24-GHz 1TX-2RX Transceiver for Compact FMCW Radar Applications.

Goo-Han Ko1, Seung-Jin Moon1, Seong-Hoon Kim1

  • 1School of Electrical Engineering, Chung-Ang University, Seoul 06974, Republic of Korea.

Sensors (Basel, Switzerland)
|March 13, 2024
PubMed
Summary
This summary is machine-generated.

This study presents a compact 24-GHz frequency modulated continuous wave (FMCW) radar transceiver, featuring integrated components for enhanced performance in radar applications. The developed system demonstrates efficient power output and high gain, enabling accurate distance and angle measurements.

Keywords:
CMOSFMCW radarFMCW synthesizersensortransceiver

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Area of Science:

  • Electrical Engineering
  • Microwave Engineering
  • Integrated Circuits

Background:

  • Compact Frequency Modulated Continuous Wave (FMCW) radar systems are crucial for various applications, including automotive and industrial sensing.
  • Existing FMCW radar transceivers often face challenges with integration, power consumption, and performance metrics.
  • There is a continuous need for highly integrated, low-power, and high-performance radar transceivers for next-generation sensing solutions.

Purpose of the Study:

  • To present a fully integrated 24-GHz FMCW radar transceiver with one transmitter (TX) and two receivers (RXs).
  • To demonstrate the feasibility of a compact FMCW radar system for target detection and measurement.
  • To achieve high performance in terms of output power, gain, and phase noise within a small form factor.

Main Methods:

  • Design and fabrication of a 24-GHz radar transceiver using 65 nm CMOS technology.
  • Integration of a fractional-N phase-locked loop (PLL) synthesizer and programmable chirp generator.
  • Implementation of a direct conversion I-Q receiver architecture with DC offset cancellation (DCOC) circuits.
  • Characterization of the transmitter (TX) output power and receiver (RX) gain.
  • System-level verification using a prototype FMCW radar with a Yagi antenna.

Main Results:

  • The integrated transceiver achieves a TX output power of 13 dBm with minimal variation (<0.5 dB) across the 24-24.25 GHz band.
  • The RX chain provides a high overall gain of 100 dB.
  • The synthesizer exhibits a phase noise of -80 dBc/Hz at 100 kHz offset.
  • The fabricated transceiver operates at 220 mW from a 1 V supply with a die size of 4.84 mm².
  • Successful demonstration of distance and angle measurement capabilities for targets.

Conclusions:

  • A fully integrated 24-GHz FMCW radar transceiver has been successfully designed and demonstrated.
  • The compact size, low power consumption, and high performance make this transceiver suitable for various compact radar applications.
  • The achieved results validate the potential of the proposed design for advanced radar sensing systems.