RF performance of ultra-wide bandgap HEMTs

Rajan Singh, T. R. Lenka, D. Panda, R. T. Velpula, B. Jain, H. Q.T. Bui, H. P.T. Nguyen

Research output: Chapter in Book/Report/Conference proceedingChapter


In the current scenario of high-speed electronics technology, many application areas-broadband Internet access, fifth-generation (4G/5G) mobile systems, and cutting-edge military applications-are realizing very-fast to reality. To cater these ever-increasing demands, radio-frequency (RF) and microwave power amplifiers are in prime-attention, and will be constantly evaluated on price versus performance metrics. Ultra-wide bandgap (UWBG) high electron mobility transistors (HEMTs) are promising candidates for switching power applications owing to very-high breakdown strength of the material. And higher values of energy band gap (Eg) and electron mobility enabled low on-resistance (RON) guarantees superior power handling capability. UWBG HEMTs having two-dimensional electron gas (2DEG) channel with high carrier concentration and high electron mobility are fast gaining space in high frequency and power switching applications. Also, these UWBG materials having large optical phonon energy, Eop ~92 meV (GaN), ~45 meV (Β-Ga2O3) make them most suitable semiconductor materials for the imminent terahertz (THz, 1012 Hz) frequency applications: THz imaging and spectroscopy. In this paper, we present latest technological developments of the gallium nitride (GaN)- and beta-phase of gallium oxide (Β-Ga2O3)-based HEMTs, with careful and quantitative investigation of their suitability toward radio frequency (RF), high power device applications, and THz emerging applications.

Original languageEnglish (US)
Title of host publicationEmerging Trends in Terahertz Solid-State Physics and Devices
Subtitle of host publicationSources, Detectors, Advanced Materials, and Light-matter Interactions
PublisherSpringer Singapore
Number of pages15
ISBN (Electronic)9789811532351
ISBN (Print)9789811532344
StatePublished - Jan 1 2020

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy
  • General Engineering
  • General Biochemistry, Genetics and Molecular Biology


  • Gallium nitride
  • Gallium oxide
  • HEMT
  • High electron mobility transistor
  • RF performance
  • Spectroscopy Bandwidth
  • Terahertz Imaging
  • Ultra-wideband gap


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