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Iterative Design of a Harmonically Tuned Multi-Octave Broadband Power Amplifier
/en/research/publications/iterative-design-of-a-harmonically-tuned-multi-octave-broadband-power-amplifier
This article presents the design approach, realization and measurement results of a highly efficient double octave wideband power amplifier using a GaN-HEMT bare-die. An iterative approach to obtain…
InP-Si BiCMOS Heterointegration Using a Substrate Transfer Process
/en/research/publications/inp-si-bicmos-heterointegration-using-a-substrate-transfer-process-1
Broadband transmitters for radio links in the millimeter band are key building blocks for future wireless communication systems. Such components can be realized by means of an InP-on-BiCMOS…
Reference Plane Transformation of Continuous Mode Terminations for Broadband Power Amplifiers
/en/research/publications/reference-plane-transformation-of-continuous-mode-terminations-for-broadband-power-amplifiers
In this article the behavior of continuous mode amplifiers at different reference planes is discussed using the example of a continuous class-F-1 amplifier mode. The variation of the output…
Potential of Coplanar X-band GaN-MMIC Power Amplifiers
/en/research/publications/potential-of-coplanar-x-band-gan-mmic-power-amplifiers
While the vast majority of GaN X-band PAs is realized as microstrip circuits, this paper reports design, fabrication and measurement of a coplanar version. The amplifier is processed using the FBH…
A 246 GHz Hetero-Integrated Frequency Source in InP-on-BiCMOS Technology
/en/research/publications/a-246-ghz-hetero-integrated-frequency-source-in-inp-on-bicmos-technology
A 246 GHz source in InP-on-BiCMOS technology is presented. It consists of a voltage controlled oscillator (VCO) in BiCMOS technology and a frequency tripler in transferred-substrate InP-HBT…
Crosstalk Corrections for Coplanar-Waveguide Scattering-Parameter Calibrations
/en/research/publications/crosstalk-corrections-for-coplanar-waveguide-scattering-parameter-calibrations
We study crosstalk and crosstalk corrections in coplanar-waveguide vector-network-analyzer calibrations. We show that while crosstalk corrections can improve measurement accuracy, the effectiveness…
Self-Heating in GaN Transistors Designed for High-Power Operation
/en/research/publications/self-heating-in-gan-transistors-designed-for-high-power-operation
DC and transient self-heating effects are investigated in normally off AlGaN/GaN transistors designed for a highpower operation. Electrical and optical methods are combined with thermal simulations;…
Generation of spectrally stable continuous-wave emission and ns pulses with a peak power of 4 W using a distributed Bragg reflector laser and a ridge-waveguide power amplifier
/en/research/publications/generation-of-spectrally-stable-continuous-wave-emission-and-ns-pulses-with-a-peak-power-of-4nbspw-using-a-distributed-bragg-reflector-laser-and-a-ridge-waveguide-power-amplifier
We have developed a diode-laser based master oscillator power amplifier (MOPA) light source which emits high-power spectrally stabilized and nearly-diffraction limited optical pulses in the…
Intra-cavity frequency-doubled Cr:LiCAF laser with 265 mW continuous-wave blue (395-405 nm) output
/en/research/publications/intra-cavity-frequency-doubled-crlicaf-laser-with-265nbspmw-continuous-wave-blue-395-405nbspnm-output
We describe continuous-wave (cw) intracavity frequency-doubling experiments performed with a Cr:LiCAF laser. The Cr:LiCAF crystal is home-grown and had passive losses below 0.15% per cm. The laser is…
Double-heterostructure ridge-waveguide GaAs/AlGaAs phase modulator for 780 nm lasers
/en/research/publications/double-heterostructure-ridge-waveguide-gaasalgaas-phase-modulator-for-780nbspnm-lasers
Results of a GaAs/AlGaAs-based phase modulator designed for an operating wavelength of 780 nm are presented for the first time. The modulator is based on a P-p-i-n-N double heterostructure and…