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Molecular Spectroscopy With a Compact 557-GHz Heterodyne Receiver
/en/research/publications/molecular-spectroscopy-with-a-compact-557-ghz-heterodyne-receiver
We report on a heterodyne terahertz spectrometer based on a fully integrated 557-GHz receiver and a digital fast Fourier transform spectrometer. The receiver consists of a chain of multipliers and…
Tunable Impedance Matching Networks on Printed Ceramics for Output Matching of RF-Power Transistors
/en/research/publications/tunable-impedance-matching-networks-on-printed-ceramics-for-output-matching-of-rf-power-transistors
This work addresses tunable matching networks fabricated on functional thick film layers of Barium-Strontium- Titanate (BST) for RF-power transistors. The deposition of BST layers is performed in a…
Advanced Lumped-Element Trisection Filter for Digital Microwave Power Amplifiers
/en/research/publications/advanced-lumped-element-trisection-filter-for-digital-microwave-power-amplifiers
In this paper, a compact lumped element bandpass reconstruction filter for digital microwave power amplifier applications in the 800 MHz band is presented. The filter, based on the trisection…
A 270 GHz Push-Push Oscillator in InP-DHBT-on-BiCMOS Technology
/en/research/publications/a-270nbspghz-push-push-oscillator-in-inp-dhbt-on-bicmos-technology
A 270-GHz reflection-type push-push oscillator is presented, realized using 0.8µm emitter InP-DHBTs. The InP DHBT-on-BiCMOS offers both InP HBT and BiCMOS technologies but in this case only the InP…
Synthesis and Design of a Dual-Band Dual-Mode Filter in All Inductive Waveguide Technology
/en/research/publications/synthesis-and-design-of-a-dual-band-dual-mode-filter-in-all-inductive-waveguide-technology
This work presents a novel topology for the design and realization of a dualband microwave filter combining for the first time single and dual-mode cavities in all-inductive waveguide technology. The…
Compact High-Power High-Efficiency Microwave Generator With Differential Outputs
/en/research/publications/compact-high-power-high-efficiency-microwave-generator-with-differential-outputs
This paper reports a compact high power oscillator operating from 2.3 GHz to 2.9 GHz. Its two differential outputs deliver up to 57 W of power with an efficiency peaking at 54 %.…
VSWR Testing of RF-Power GaN Transistors
/en/research/publications/vswr-testing-of-rf-power-gan-transistors
A novel procedure for voltage standing wave ratio (VSWR) ruggedness testing of GaN-HEMTs is described. In the test the transistor is exposed to an increasing level of VSWR stress and an extensive set…
GaN HEMT Noise Model Performance under Nonlinear Operation
/en/research/publications/gan-hemt-noise-model-performance-under-nonlinear-operation
This paper investigates the capability of Pospieszalski-type and Pucel-type noise model implementations to predict the truly nonlinear noise behavior of GaN HEMT devices. The bias-dependence of the…
Design of a GaN HEMT Power Amplifier Using Resistive Loaded Harmonic Tuning
/en/research/publications/design-of-a-gan-hemt-power-amplifier-using-resistive-loaded-harmonic-tuning
The proper termination of the 2nd harmonic impedance is the basic task during the design of a harmonically tuned power amplifier. In addition to several approaches of defining fundamental and…
Accurate frequency noise measurement of free-running lasers
/en/research/publications/accurate-frequency-noise-measurement-of-free-running-lasers
We present a simple method to accurately measure the frequency noise power spectrum of lasers. It relies on creating the beat note between two lasers, capturing the corresponding signal in the time…