research overview
- Researcher in the field of RF, microwave and millimeter wave circuits, components and antennas
- Contact Info
Lasser, Gregor
Positions
- Visiting Asst Professor, Electrical, Computer and Energy Engineering (ECEE)
Research Areas
- Antennae
- Antennae and Wave Guides
- Applied Electronics
- Circuits and Systems
- Communication Systems
- Electrical Engineering/Electronics
- Electromagnetic Fields
- Electromagnetic Propagation
- Integrated Circuits
- Microelectronics
- Microwave Theory
- Millimeter Waves
- Monolithic Circuits
- Novel Device Concepts
- Radar
- Satellite Communication
- Solid State Electronics
Research
keywords
- radio frequency, power amplifiers, antennas, supply modulation, envelope tracking, gan, efficiency
Publications
selected publications
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chapter
- Innovations in Antenna Systems for Communications. 383-421. 2016
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conference proceeding
- GaAs MMIC Interferometer for Broadband Interference Suppression. 17-20. 2022
- A 10-W 6-12 GHz GaN MMIC Supply Modulated Power Amplifier. 436-439. 2022
- A 10W 6-12GHz GaN MMIC Supply Modulated Power Amplifier 2022
- A 10W 6-12GHz GaN MMIC Supply Modulated Power Amplifier 2022
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Cryogenic Decade-Passband Superconducting Integrated Diplexer.
IEEE MTT-S International Microwave Symposium digest. IEEE MTT-S International Microwave Symposium.
156-159.
2022
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A S-C- / K-band Reconfigurable GaAs MMIC Power Amplifier for 5G Applications.
IEEE MTT-S International Microwave Symposium digest. IEEE MTT-S International Microwave Symposium.
873-876.
2021
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Top-loaded 60:1 Wideband Direction-Finding Sensor
2019
-
Discrete Supply Modulation of a Three-Stage K-Band PA.
698-701.
2019
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Dual Gate and Drain Supply Modulation of an X-Band PA.
IEEE MTT-S International Microwave Symposium digest. IEEE MTT-S International Microwave Symposium.
979-982.
2019
- Alumina Passives Using the Interconnect Layer of Metal-Embedded Chip Assembly Processing 2018
- A 4-W K-Band 40% PAE Three-Stage MMIC Power Amplifier. 144-147. 2018
- Independent Dynamic Gate Bias for a Two-Stage Amplifier for Amplitude and Phase Linearization 2018
- An Efficient Linearized Octave-Bandwidth Power Amplifier for Carrier Aggregation. IEEE MTT-S International Microwave Symposium digest. IEEE MTT-S International Microwave Symposium. 473-476. 2018
- Enabling Passive Components for High-Power Wideband Millimeter Wave Repeater Applications. 74-76. 2018
- Broadband supply modulation for RF transmitter efficiency enhancement 2018
- Improvement of MAW Spiral Measurements by Filtering Spherical Modes in the Far Field. 204-207. 2017
- Efficiency Enhancement and Linearization of GaN PAs using Reduced-Bandwidth Supply Modulation. 456-459. 2017
- 3-Arm Spiral Antennas for Direction Finding Applications. AP-S International Symposium (Digest) (IEEE Antennas and Propagation Society). 1543-1544. 2017
- A Spiral Antenna for Amplitude-Only Direction Finding. AP-S International Symposium (Digest) (IEEE Antennas and Propagation Society). 927-928. 2017
- Bandwidth-Reduced Supply Modulation of a High-Efficiency X-band GaN MMIC PA for Multiple Wideband Signals. IEEE MTT-S International Microwave Symposium digest. IEEE MTT-S International Microwave Symposium. 1850-1853. 2017
- Discrete-Level Envelope Tracking for Broadband Noise-Like Signals. IEEE MTT-S International Microwave Symposium digest. IEEE MTT-S International Microwave Symposium. 1942-1945. 2017
- Gate Control of a Two-Stage GaN MMIC Amplifier for Amplitude and Phase Linearization 2017
- A Wide-Band Spiral Based Amplitude-Only Azimuth Direction Finding System. AP-S International Symposium (Digest) (IEEE Antennas and Propagation Society). 1823-1824. 2016
- Tuning an Electrically Small On-The-Move HF Half-Loop Antenna. Proceedings of the European Conference on Antennas and Propagation. European Conference on Antennas and Propagation. 2016
- Tuning an Electrically Small On-The-Move HF Half-Loop Antenna. Proceedings of the European Conference on Antennas and Propagation. European Conference on Antennas and Propagation. 2016
- Dual-Band, Low-Frequency Artificial Magnetic Conductor using Lumped Components. 175-177. 2015
- Empirical Path Loss Model Fit from Measurements from a Vehicle-to-Infrastructure Network in Munich at 5.9 GHz. 181-185. 2015
- Self-Interference Noise Limitations of RFID Readers. 145-150. 2015
- Effect of Carbon-Fiber Composites as Ground Plane Material on Antenna Performance. 711-714. 2014
- Near Field Scans of Tyre mounted Dipoles using a separate Phase Reference Antenna. 612-615. 2014
- Vehicular Low-Profile Dual-Band Antenna for Advanced Tyre Monitoring Systems. 1785-1790. 2012
- Increased Detectivity and Operation Temperature in Photonic Crystal Slab Quantum Well Photodetectors 2012
- Gain and Efficiency Measurement of Antennas for an Advanced Tire Monitoring System. AP-S International Symposium (Digest) (IEEE Antennas and Propagation Society). 2010
- Active Carrier Compensation for a Multi-Antenna RFID Reader Frontend. IEEE MTT-S International Microwave Symposium digest. IEEE MTT-S International Microwave Symposium. 2010
- Dual-Band Channel Measurements for an Advanced Tyre Monitoring System 2010
- Channel Model for Tyre Pressure Monitoring Systems (TPMS) 2010
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Broadband Suppression Properties of Active Leaking Carrier Cancellers.
208-212.
2009
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journal article
-
Deliberate Source/Load Mismatch for Linearity and Efficiency of Discrete Supply Modulated GaN PAs.
IEEE Transactions on Microwave Theory and Techniques.
6833-6844.
2024
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The 2025 Power Amplifiers for Radio and Wireless Applications Conference [IEEE Radio & Wireless Week 2025].
IEEE Microwave magazine.
26-26.
2024
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Demonstration of Thermoradiative Power Generation Using Compensated Infrared Rectennas.
ACS Photonics.
3866-3874.
2023
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Gate Pulsing as a Transient Ringing Reduction Method for Multilevel Supply Modulators.
IEEE Transactions on Power Electronics.
9358-9361.
2023
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Linear broadband interference suppression circuit based on GaN monolithic microwave integrated circuits.
IET Circuits, Devices and Systems.
213-224.
2023
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An 800-W Four-Level Supply Modulator for Efficient Envelope Tracking of RF Transmitters.
IEEE journal of emerging and selected topics in power electronics.
3251-3260.
2023
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Nonlinear and Load-Pulling Effects in an Octave-Bandwidth Transmit Array.
IEEE Transactions on Microwave Theory and Techniques.
350-359.
2023
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RF Josephson Arbitrary Waveform Synthesizer With Integrated Superconducting Diplexers.
IEEE Transactions on Applied Superconductivity.
2022
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IMS2022 Student Paper Competition.
IEEE Microwave magazine.
123-123.
2022
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0.01-22-GHz Feedback-Stabilized Single-Supply GaAs Cascode Distributed Amplifiers.
IEEE Microwave and Wireless Components Letters.
1291-1294.
2021
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A Microwave Quantum-Defined Millivolt Source.
IEEE Transactions on Microwave Theory and Techniques.
5404-5416.
2021
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Broadband Small-Aperture High-Gain Ridge Horn Antenna Array Element.
IEEE Antennas and Wireless Propagation Letters.
708-712.
2021
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Analysis of Process Variations in W-Band GaN MMIC PAs Using Nonparametric Statistics.
IEEE Transactions on Microwave Theory and Techniques.
2304-2318.
2021
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Making a Low-Cost Software-Defined UHF RFID Reader.
IEEE Microwave magazine.
25-45.
2021
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Efficiency and linearity enhancement of a two-stage X-band PA through simultaneous gate and drain supply modulation.
IET Microwaves, Antennas and Propagation.
1347-1354.
2020
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Distortion mitigation for 100 and 250 MHz discrete supply modulation of a three-stage K-band MMIC PA.
International Journal of Microwave and Wireless Technologies.
707-715.
2020
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An 18-38-GHz K-/Ka-Band Reconfigurable Chireix Outphasing GaAs MMIC Power Amplifier.
IEEE Transactions on Microwave Theory and Techniques.
3028-3038.
2020
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Electromagnetic-Wave Fun Using Simple Take-Home Experiments [Education Corner].
IEEE Antennas and Propagation Magazine.
100-106.
2020
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A Three-Stage 18.5-24-GHz GaN-on-SiC 4 W 40% Efficient MMIC PA.
IEEE Journal of Solid State Circuits.
2402-2410.
2019
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Metal-Embedded Chip Assembly Processing for Enhanced RF Circuit Performance.
IEEE Transactions on Microwave Theory and Techniques.
3537-3546.
2019
-
Dynamic Dual-Gate Bias Modulation for Linearization of a High-Efficiency Multistage PA.
IEEE Transactions on Microwave Theory and Techniques.
2483-2494.
2019
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Efficient Multisignal 2-4-GHz Power Amplifier With Power Tracking.
IEEE Transactions on Microwave Theory and Techniques.
5652-5663.
2018
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Performance Characterization of Four-Arm MAW Spiral Antennas for Digital Direction-of-Arrival Sensing.
IEEE Transactions on Antennas and Propagation.
2761-2769.
2018
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Wideband Antenna Systems for Millimeter-Wave Amplitude-Only Direction Finding.
IEEE Transactions on Antennas and Propagation.
3122-3129.
2018
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Wide-Band High-Frequency Antennas for Military Vehicles Designing and testing low-profile half-loop, inverted-L, and umbrella NVIS antennas.
IEEE Antennas and Propagation Magazine.
64-74.
2016
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Low-Profile Switched-Beam Antenna Backed by an Artificial Magnetic Conductor for Efficient Close-to-Metal Operation.
IEEE Transactions on Antennas and Propagation.
1307-1316.
2016
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Automatic leaking carrier canceller adjustment techniques.
Eurasip Journal on Embedded Systems.
2013
-
Detectivity enhancement in quantum well infrared photodetectors utilizing a photonic crystal slab resonator.
Optics Express.
5622-5628.
2012
-
Deliberate Source/Load Mismatch for Linearity and Efficiency of Discrete Supply Modulated GaN PAs.
IEEE Transactions on Microwave Theory and Techniques.
6833-6844.
2024
Teaching
courses taught
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ECEN 5014 - Special Topics
Primary Instructor - Spring 2019 / Spring 2020 / Fall 2021
Examines a special topic in Electrical, Computer and Energy Engineering. May be repeated up to 9 total credit hours. -
ECEN 5104 - Passive Microwave Circuits
Primary Instructor - Fall 2020 / Fall 2021
Building on fundamentals taught in a class such as ECEN 3410 (Electromagnetic Waves), this course teaches fundamentals of microwave passive circuit analysis using scattering parameters. Design of impedance matching networks, impedance transformers, couplers, filters, dividers/combiners and other typical circuits used at microwave frequencies are covered. Using an industry-standard CAD tool, design of microstrip circuits is emphasized. Assignments include theoretical and CAD approaches to analysis and design of passive microwave transmission-line circuits.
Background
education and training
- Ph.D., Technical Univ of Vienna (Austria) 2014
- M.S., Technical Univ of Vienna (Austria) 2008
- B.S., Technical Univ of Vienna (Austria) 2007