A5015295494- Microwave Engineering and Waveguides
- Radio Frequency Integrated Circuit Design
- Particle accelerators and beam dynamics
- Antenna Design and Analysis
- Acoustic Wave Resonator Technologies
- Gyrotron and Vacuum Electronics Research
- Photonic and Optical Devices
- Advanced Antenna and Metasurface Technologies
- Structural Analysis and Optimization
- Particle Accelerators and Free-Electron Lasers
- Advanced MEMS and NEMS Technologies
- Millimeter-Wave Propagation and Modeling
- Microwave and Dielectric Measurement Techniques
- Superconducting Materials and Applications
- Mechanical Behavior of Composites
- Advanced Power Amplifier Design
- Aeroelasticity and Vibration Control
- Composite Structure Analysis and Optimization
- Neutrino Physics Research
- Electromagnetic Compatibility and Noise Suppression
- Antenna Design and Optimization
- GaN-based semiconductor devices and materials
- Particle physics theoretical and experimental studies
- Structural Load-Bearing Analysis
- Energy Harvesting in Wireless Networks
Uppsala University
2016-2025
UCLouvain
2006-2014
IMEC
2010-2011
The University of Texas at Arlington
2010-2011
Imec the Netherlands
2011
University College London
2010
Georgia Institute of Technology
1997-2006
Abstract A design study, named $${\text {ESS}}\nu {\text {SB}}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mtext>ESS</mml:mtext><mml:mi>ν</mml:mi><mml:mtext>SB</mml:mtext></mml:mrow></mml:math> for European Spallation Source neutrino Super Beam, has been carried out during the years 2018–2022 of how 5 MW proton linear accelerator under construction in Lund, Sweden, can be used to produce world’s most intense long-baseline beam. The high beam intensity will allow...
A bstract Neutrino oscillation experiments provide a unique window in exploring several new physics scenarios beyond the standard three flavour. One such scenario is quantum decoherence neutrino which tends to destroy interference pattern of neutrinos reaching far detector from source. In this work, we study context ESSnuSB experiment. We consider energy-independent parameter and derive analytical expressions for P μe μμ probabilities vacuum. have computed capability put bounds on parameters...
In this paper, we study scalar mediator induced nonstandard interactions (SNSIs) in the context of ESSnuSB experiment. particular, capability to put bounds on SNSI parameters and also impact SNSIs measurement leptonic <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>C</a:mi><a:mi>P</a:mi></a:math> phase <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:msub><c:mi>δ</c:mi><c:mrow><c:mi>C</c:mi><c:mi>P</c:mi></c:mrow></c:msub></c:math>....
Different types of bondwire interconnect for differential chip-to-antenna and single-ended chip-to-chip interfaces are investigated. Two compensation structures various lengths interconnects designed experimentally evaluated using dedicated transmit receive radar modules operating across a 110–156 GHz band. Measurement results demonstrate that fractional bandwidth 7.5% minimum insertion loss 0.2 dB can be achieved as long 0.8 mm. Design measurement an extremely wideband low-loss features 1.5...
Today, the majority of wagon failures on railroad systems are because poor maintenance ball bearings, which causes emergent stops and delays. The existing stationary detectors, lack in predicting cause troubles scheduling maintenance. During fall 2011, a trial was performed by applying wireless sensor network (WSN) aboard train with objective to demonstrate proof concept for monitoring temperature bearings wagon. This investigates several key aspects when networks such as radio wave...
The feasibility and very good performance of a kilowatt-level power amplifier in single-ended architecture, intended for energy systems are demonstrated. prototype is designed at 352 MHz the ESS LINAC delivers 1250 W with 71% efficiency pulsed operation duty cycle 5%, 3.5 ms pulse 14 Hz repetition.
Highly integrated multilayered printed circuit board-based patch antenna arrays are proposed in this study for 60 GHz wireless communications. Electromagnetic coupling between two stacked patches is used to achieve the broadband performance. Different structures of single element antennas, two-element and four-element presented. The compact show < −10 dB impedance bandwidth 13 14.6% with 12 dBi peak gain. have 3 gain 9 13%. A column, sub-array design 4 × 16 array. This array delivers 20.8...
Bondwire interconnects for differential chip-to-antenna interfaces are investigated. Two different compensation structures interconnect lengths designed and evaluated using dedicated transmit receive BiCMOS modules operating across a 110 to 156 GHz band. Measurement results demonstrate that 9 bandwidth minimum insertion loss of 0.2 dB can be achieved as long 0.8 mm, showing the well established wire-bonding techniques still an attractive solution even beyond 100 GHz. Reproducibility proposed...
Different lengths of WR3 (220–330 GHz) and WR10 (75–110 waveguides are fabricated through direct metal laser sintering (DMLS). The losses in these measured modelled using the Huray surface roughness model. around 0.3 dB/mm 0.05 dB/mm. equation model is accounting relatively good for attenuation waveguide but deviates more waveguide. compared to finite element simulations assuming an approximate structure similar resulting one from DMLS process.
A compact single-stage 8-1 Gysel Combiner in planar technology for operation with 352-MHz pulses peak output power of 10 kW has been designed, manufactured, and tested. The module 0.2-dB insertion loss when operated at nominal power, the return all ports is 20 dB or better. was using 3.3-ms 14-Hz repetition rate without any signs degradation, thermal heating, arcing. new design makes use inclusions weakly coupled lines common point section combiner. It possible to adjust port imbalances...
Abstract This paper outlines an experimental demonstration of envelope tracking (ET) technique applied to a kilowatt-level single-ended solid-state power amplifier (SSPA), aimed at enhancing the charging efficiency superconducting radio frequency (SRF) cavities by reducing reflection while maintaining high degree efficiency. The is particularly designed for pulsed operation European Spallation Source (ESS) nominal 352 MHz, with 5% duty cycle and pulse width 3.5 ms. study introduces optimal...
Abstract This paper introduces an innovative conceptual design of a 400 kW solid-state power amplifier (SSPA) station and presents preliminary measurements for the key components. Recent advancements benefits technology have made prospect replacing vacuum tubes increasingly appealing. Historically, significant challenge was limited output capacity individual transistors, necessitating integration numerous units to generate high-power microwave signals in range hundreds kilowatts. However,...
This paper presents the design and characterization of a Substrate Integrated Waveguide (SIW) filter, with large bandwidth 7 GHz, designed to cover unlicensed frequency band, 57-64 GHz. The seven-pole Chebyshev is integrated in Low-Temperature Co-fired Ceramic (LTCC). It characterized by measured 11.8% around central 59.1 low passband insertion loss 2.4 dB high stop band lower higher respectively 50 30 dB. filter has compact size 9450 × 2100 200 μm <sup...
The FREIA laboratory is a Facility for REsearch Instrumentation and Accelerator Development at Uppsala University, Sweden, constructed recently to develop test accelerator components. Initially it will the RF system spoke cavities of ESS linac prototype nominal power. For this purpose we installed helium liquefaction plant soon recieve versatile horizontal cryostat two 352 MHz power stations, one based on tetrodes other solid state technology. Beyond these developments house neutron...
In this paper, a novel differential microstrip patch antenna (DMPA) is designed and used to feed lens for short range F-band MIMO radars. The DMPA fed differentially by pair of coupled lines. connected via impedance matching network the output modules, eliminating way need balun in RF frontend. simulated gain about 8 dBi bandwidth (S11 <; -10 dB) between 125-137 GHz. Preliminary experimental measurements are shown using Transmit/Receive modules 0.13 μm SiGe:C BiCMOS technology, hybrid...
In this paper we present a 28 GHz antenna in package (AiP) design for 5G applications. The array is placed the fan-out region of eWLB (enhanced Wafer Level Ball Grid Array) package. Separate arrays are used TX and RX, which on one two re-distribution layers (RDL) inside heatsink required chip operation also as horn to improve performance. 4-element dipole has impedance bandwidth almost 6 (24 GHz-30 GHz) gives maximum gain 9.5 dBi. Beam-steering ± 35 deg achieved azimuthal plane (H-plane) by...
Transmit and Receive (TX/RX) F-band radar modules are presented. Both implemented in a state of the art SiGe:C BiCMOS featuring high-speed HBTs with f <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">T</sub> /f xmlns:xlink="http://www.w3.org/1999/xlink">max</sub> 300/500 GHz. The TX is based on frequency octupler that consists cascade three Gilbert cells, covering upper from 120-140 GHz providing differential output power up to 6 dBm, highest...
Background More than 2 million cases of skin cancer are diagnosed annually in the United States, which makes it most common form that country. Early detection usually results less extensive treatment and better outcome for patient. Millimeter wave silicon micromachined waveguide probe is foreseen as an aid diagnosis, currently based on visual inspection followed by biopsy, where macroscopical picture raises suspicion malignancy. Aims Demonstration discrimination potential tissues different...