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Determination of Soil Constituents Using Shifted Excitation Raman Difference Spectroscopy
/en/research/publications/determination-of-soil-constituents-using-shifted-excitation-raman-difference-spectroscopy
Soil analysis to estimate soil fertility parameters is of great importance for precision agriculture but nowadays it still relies mainly on complex and time-consuming laboratory methods. Optical…
Areal Vertical Transmission Line Model Measurement for Drift Region Characterization in Vertical GaN Based Devices
/en/research/publications/areal-vertical-transmission-line-model-measurement-for-drift-region-characterization-in-vertical-gan-based-devices
In this work we present a process control monitoring (PCM) device for electrical characterization of vertical n--GaN drift region layer conduction properties. An areal vertical transmission line…
GaN-HEMT Integrated Switch LNA Module for 5G Mobile Communications
/en/research/publications/gan-hemt-integrated-switch-lna-module-for-5g-mobile-communications
An integration of a two-stage low noise amplifier along with a single pole double throw switch being part of the transceiver front-end using GaN HEMT technology is presented in this paper. The…
A Novel System for Recovery Time Measurements of GaN-Based Low-Noise Amplifiers
/en/research/publications/a-novel-system-for-recovery-time-measurements-of-gan-based-low-noise-amplifiers
A novel setup allowing for recovery time measurement of robust GaN LNA is presented in this paper. The setup is based on an PNA-X vector network analyzer and allows for the characterization of the…
Characteristics of Diode Detectors for Six-Port Radars
/en/research/publications/characteristics-of-diode-detectors-for-six-port-radars
In recent times, six-port radar technology has been implemented for accurate phase measurements due to its low cost and easy implementation. This work focuses on various design aspects of a six-port…
A Compact Wide Coverage 0.7-1.5 GHz MEMS-based Impedance Tuner
/en/research/publications/a-compact-wide-coverage-07-15-ghz-mems-based-impedance-tuner
We propose a lumped element re-configurable impedance tuner with wide impedance coverage within the 0.7 - 1.5 GHz frequency band. The fabricated device is compact and the design is centered…
Formation of voids and their role in the recovery of sputtered AlN during hightemperature annealing
/en/research/publications/formation-of-voids-and-their-role-in-the-recovery-of-sputtered-aln-during-hightemperature-annealing
The structural recovery of AlN grown by reactive sputtering on a sapphire substrate during high-temperature annealing is studied by means of transmission electron microscopy and secondary ion mass…
Comparison of individual and common wavelength-operation for 785 nm Y-branch DBR ridge waveguide diode lasers with adjustable spectral distance
/en/research/publications/comparison-of-individual-and-common-wavelength-operation-for-785-nm-y-branch-dbr-ridge-waveguide-diode-lasers-with-adjustable-spectral-distance
An experimental comparison between individual and common wavelength-operation of a Y-branch distributed Bragg reflector (DBR) ridge waveguide (RW) laser at 785 nm with an electrically adjustable…
Linien: A versatile, user-friendly, open-source FPGA-based tool for frequency stabilization and spectroscopy parameter optimization
/en/research/publications/linien-a-versatile-user-friendly-open-source-fpga-based-tool-for-frequency-stabilization-and-spectroscopy-parameter-optimization
We present a user-friendly and versatile tool for laser frequency stabilization. Its main focus is spectroscopy locking, but the software is suitable for lock-in techniques in general as well as bare…
Micro-integrated high-power narrow-linewidth external-cavity tapered diode laser at 762 nm for daylight imaging
/en/research/publications/micro-integrated-high-power-narrow-linewidth-external-cavity-tapered-diode-laser-at-762-nm-for-daylight-imaging
Solar radiation is a challenge for laser-based daylight imaging since it decreases the signal-to-noise ratio (SNR) of the imaging. Here we demonstrate a micro-integrated external-cavity tapered diode…