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A 37-40 GHz 6-Bits Switched-Filter Phase Shifter Using 150 nm GaN HEMT.

Jae-Hyeok Song1, Eun-Gyu Lee1, Jae-Eun Lee1

  • 1Department of Electronics Engineering, Chungnam National University, Daejeon 34134, Republic of Korea.

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|October 27, 2023
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Summary
This summary is machine-generated.

A novel 6-bit phase shifter was developed for 5G applications, achieving a full 360° phase range with low loss and minimal phase error. This GaN HEMT device is ready for high-power RF integration.

Keywords:
5G NR (n260)GaN HEMTSTPST-type filterphase shifter

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Area of Science:

  • Electrical Engineering
  • Materials Science
  • Telecommunications

Background:

  • 5G New Radio (NR) technology requires advanced RF components for efficient signal manipulation.
  • High-frequency operation, particularly in the n260 band (37-40 GHz), presents significant design challenges for phase shifters.
  • Gallium Nitride High Electron Mobility Transistor (GaN HEMT) processes offer advantages for high-power and high-frequency applications.

Purpose of the Study:

  • To design and fabricate a 6-bit phase shifter for the 5G n260 band.
  • To achieve a wide phase range (360°) with high accuracy and low insertion loss.
  • To ensure compatibility with high-power Radio Frequency (RF) circuits.

Main Methods:

  • Utilized a 150 nm GaN HEMT fabrication process.
  • Implemented a switched-filter phase shifter architecture.
  • Serially connected six single-bit phase shifters with individual phase shifts from 180° down to 5.625°.

Main Results:

  • The fabricated phase shifter operates effectively within the 37-40 GHz frequency range.
  • Achieved a total phase shift range of 360°.
  • Demonstrated a minimum insertion loss of 5 dB.
  • Exhibited a Root Mean Square (RMS) phase error below 5.36°.

Conclusions:

  • The developed 6-bit GaN HEMT phase shifter meets the stringent requirements for 5G n260 band applications.
  • The device offers excellent phase control and performance metrics suitable for integration into high-power RF systems.
  • This work contributes to the advancement of RF front-end modules for next-generation wireless communication.