TY - CHAP A1 - Rudolph, Matthias A1 - Bengtsson, Olof A1 - Bent, G. van der A1 - Heinigen, M. van A1 - Vliet, F. F. van T1 - GaN-HEMT VSWR Ruggedness and Amplifier Protection Y1 - 2010 ER - TY - CHAP A1 - Andrei, Cristina A1 - Dörner, Ralf A1 - Bengtsson, Olof A1 - Chevtchenko, Serguei A. A1 - Heinrich, Wolfgang A1 - Rudolph, Matthias T1 - Highly Linear X-Band GaN-Based Low-Noise Amplifier T2 - Signals, Systems, and Electronics (ISSSE), 2012 International Symposium on , Potsdam Y1 - 2012 UR - http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=6362332 SN - 978-1-4673-4454-8 SN - 978-1-4673-4453-1 PB - IEEE CY - Piscataway, NJ ER - TY - GEN A1 - Schnieder, Frank A1 - Bengtsson, Olof A1 - Schmückle, Franz-Josef A1 - Rudolph, Matthias A1 - Heinrich, Wolfgang T1 - Simulation of RF Power Distribution in a Packaged GaN Power Transistor Using an Electro-Thermal Large-Signal Description T2 - IEEE transactions on microwave theory and techniques Y1 - 2013 U6 - https://doi.org/10.1109/TMTT.2013.2261089 SN - 0018-9480 VL - 61 IS - 7 SP - 2603 EP - 2609 ER - TY - CHAP A1 - Andrei, Cristina A1 - Bengtsson, Olof A1 - Dörner, Ralf A1 - Chevtchenko, Serguei A. A1 - Heinrich, Wolfgang A1 - Rudolph, Matthias T1 - Dynamic behaviour of a Low-Noise Amplifier GaN MMIC under input power overdrive T2 - Proceedings of 45th European Microwave Conference, Paris 2015 Y1 - 2015 U6 - https://doi.org/10.1109/EuMC.2015.7345742 SP - 231 EP - 234 PB - IEEE ER - TY - CHAP A1 - Andrei, Cristina A1 - Bengtsson, Olof A1 - Dörner, Ralf A1 - Chevtchenko, Serguei A. A1 - Rudolph, Matthias T1 - Robust Stacked GaN-Based Low-Noise Amplifier MMIC for Receiver Applications T2 - IEEE MTT-S International Microwave Symposium (IMS), 17-22 May 2015 Y1 - 2015 U6 - https://doi.org/10.1109/MWSYM.2015.7166766 PB - IEEE ER - TY - CHAP A1 - Luo, Peng A1 - Bengtsson, Olof A1 - Rudolph, Matthias T1 - Reliable GaN HEMT Modeling Based on Chalmers Model and Pulsed S-Parameter Measurements T2 - 2016 German Microwave Conference, March 14-16, 2016 Bochum, Germany Y1 - 2016 SN - 978-3-9812668-7-0 U6 - https://doi.org/10.1109/GEMIC.2016.7461650 SP - 441 EP - 444 PB - IEEE CY - Piscataway, NJ ER - TY - CHAP A1 - Luo, Peng A1 - Bengtsson, Olof A1 - Rudolph, Matthias T1 - Novel Approach to Trapping Effect Modeling based on Chalmers Model and Pulsed S-Parameter Measurements T2 - 2016 11th European Microwave Integrated Circuits Conference : 3-4 October 2016, London, UK Y1 - 2016 SN - 978-2-87487-044-6 SN - 978-1-4673-9009-5 U6 - https://doi.org/10.1109/EuMIC.2016.7777514 SP - 157 EP - 160 PB - IEEE CY - Piscataway, NJ ER - TY - CHAP A1 - Luo, Peng A1 - Bengtsson, Olof A1 - Rudolph, Matthias T1 - A Drain Lag Model for GaN HEMT based on Chalmers Model and Pulsed S-Parameter Measurements T2 - IEEE MTT-S International Microwave Symposium (IMS), 4-9 June 2017, Honololu, HI, USA Y1 - 2017 SN - 978-1-5090-6360-4 U6 - https://doi.org/10.1109/MWSYM.2017.8059085 SP - 240 EP - 243 PB - IEEE CY - Piscataway, NJ ER - TY - CHAP A1 - Luo, Peng A1 - Schnieder, Frank A1 - Bengtsson, Olof A1 - Heinrich, Wolfgang A1 - Rudolph, Matthias T1 - Modeling the Virtual Gate Voltage in Dispersive GaN HEMTs T2 - IEEE/MTT-S International Microwave Symposium, 10-15 June 2018, Philadelphia, PA, USA Y1 - 2018 SN - 978-1-5386-5067-7 U6 - https://doi.org/10.1109/MWSYM.2018.8439389 SP - 728 EP - 731 PB - IEEE CY - Piscataway, NJ ER - TY - GEN A1 - Luo, Peng A1 - Schnieder, Frank A1 - Bengtsson, Olof A1 - Vadalà, Valeria A1 - Raffo, Antonio A1 - Heinrich, Wolfgang A1 - Rudolph, Matthias T1 - A streamlined drain-lag model for GaN HEMTs based on pulsed S-parameter measurements T2 - International Journal of Microwave and Wireless Technologies Y1 - 2019 U6 - https://doi.org/10.1017/S1759078719000060 SN - 1759-0787 SN - 1759-0795 VL - 11 IS - 2 SP - 121 EP - 129 ER - TY - GEN A1 - Krause, Sascha A1 - Beleniotis, Petros A1 - Bengtsson, Olof A1 - Rudolph, Matthias A1 - Heinrich, Wolfgang T1 - Characterization of the Impairment and Recovery of GaN-HEMTs in Low-Noise Amplifiers under Input Overdrive T2 - 2021 IEEE MTT-S International Microwave Symposium (IMS), 07-25 June 2021, Atlanta, GA, USA Y1 - 2021 SN - 978-1-6654-0307-8 SN - 978-1-6654-3141-5 U6 - https://doi.org/10.1109/IMS19712.2021.9574839 SN - 2576-7216 SN - 0149-645X SP - 515 EP - 518 ER - TY - GEN A1 - Bassal, Amer A1 - Chevtchenko, Serguei A. A1 - Schnieder, Frank A1 - Flisgen, Thomas A1 - Bengtsson, Olof A1 - Brunner, Frank A1 - Hilt, Oliver T1 - Impact of parasitic conductive interfaces on the DC and RF performance of GaN‐on‐GaN HEMTs T2 - Physica status solidi (A). Applications and materials science N2 - Radio frequency (RF) AlGaN/GaN high‐electron‐mobility transistors (HEMTs) on semi‐insulating GaN substrates showed an unexpectedly low output power of ≤1.7 W mm⁻¹ and a power added efficiency (PAE) of ≤15% for Vds = 20 V at 20 GHz, despite their good DC current densities (>1 A mm⁻¹) and minor trapping effects in pulsed characterization, comparable to GaN‐on‐SiC HEMTs. With theoretical calculations of Pout and PAE, and the detailed analysis of transistors and structures, a 1500 Ω/□ parasitic conductive interface (PCI) between the GaN substrate and the epitaxial layers was identified as a root cause. GaN substrates suffer from environmental Si contamination forming such a PCI. It was first detected by eddy current measurements showing that the insulating GaN:Fe buffer and GaN:Mn substrate did not effectively suppress the PCI. Nevertheless, it was effectively isolated by the GaN:Fe buffer to maintain a good DC performance for GaN‐on‐GaN HEMTs and allowing for a record gm‐max of 535 mS mm⁻¹. The S‐parameters confirmed this and indicated that the PCI causes a feed‐back effect, reducing the k‐point and fmax. Furthermore, loading effects were revealed on the ports of the HEMTs due to the PCI's resistive nature, and coplanar waveguide measurements showed 5 dB mm⁻¹ of propagation loss and severe changes in the characteristic impedance. Y1 - 2025 U6 - https://doi.org/10.1002/pssa.202500406 SP - 1 EP - 10 PB - Wiley CY - Hoboken, NJ ER -