Hans Hjelmgren

Characterization of Drain-Induced Barrier Lowering in GaN HEMTs Using a Drain Current Injection Technique

Impact of the Channel Thickness on Electron Confinement in MOCVD-Grown High Breakdown Buffer-Free AlGaN/GaN Heterostructures

2023

Tuning composition in graded AlGaN channel HEMTs toward improved linearity for low-noise radio-frequency amplifiers

Compositionally graded channel HEMTs towards improved linearity for low-noise RF amplifiers

Microwave Performance of 'Buffer-Free' GaN-on-SiC High Electron Mobility Transistors

Enhanced Mobility in InAlN/AlN/GaN HEMTs Using a GaN Interlayer

Impact of Channel Thickness on the Large-Signal Performance in InAlGaN/AlN/GaN HEMTs with an AlGaN Back Barrier

2017

Students’ own collective criteria - influence on peer feedback and lab report quality

2017

Undervisa och examinera akademisk hederlighet

Application Relevant Evaluation of Trapping Effects in AlGaN/GaN HEMTs With Fe-Doped Buffer

2015

Evaluation of Thermal Versus Plasma-Assisted ALD Al2O3 as Passivation for InAlN/AlN/GaN HEMTs

Extraction of an Electrothermal Mobility Model for AlGaN/GaN Heterostructures

Electrothermal Access Resistance Model for GaN-Based HEMTs

Characterization of Electro-Thermal Effects in GaN Based HEMTs

Transient Simulation of Microwave SiC MESFETs With Improved Trap Models

Influence of Passivation Oxide Properties on SiC Field-plated Buried Gate MESFETs

Output Power Density and Breakdown Voltage in Field-Plated Buried Gate Microwave SiC MESFETs

Influence of Field Plates and Surface Traps on Microwave Silicon Carbide MESFETs

Optimization of the UTC-PD Epitaxy for Photomixing at 340 GHz

High Power Photonic MW/THz Generation Using UTC-PD

UTC-PD Integration for Submillimetre-wave Generation

Electro-thermal simulations of a microwave 4H-SiC MESFET on high purity semi-insulating substrate

Hydrodynamic Simulations of Unitraveling-Carrier Photodiodes

High Frequency 4H-SiC MOSFETs

Design and Fabrication of 4H-SiC RF MOSFETs

SiC MESFET with a Double Gate Recess

High power-density 4H-SiC RF MOSFETs

Physical Simulations of Pseudomorphic InP HEMTs

An SiC MESFET-based MMIC process

Fabrication and characterization of field-plated buried-gate SiC MESFETs

High Power Density 4H-SiC RF MOSFETs

Fabrication of high power-density SiC MOSFETs

Single barrier varactors for submillimeter wave power generation

Numerical modelling of hot electron transport in a graded heterojunction diode

Numerical modelling of hot electron transport in Schottky-diodes and heterojunction structures

Numerical simulations of the capacitance of forward-biased Schottky-diodes

Numerical Modeling of Hot Electrons in n-GaAs Schottky Barrier Diodes