A5042791862- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Particle Accelerators and Free-Electron Lasers
- Microwave Engineering and Waveguides
- Gyrotron and Vacuum Electronics Research
- Antenna Design and Optimization
- Radio Frequency Integrated Circuit Design
- Nanomaterials and Printing Technologies
- Physics of Superconductivity and Magnetism
- Cold Atom Physics and Bose-Einstein Condensates
- GaN-based semiconductor devices and materials
- Advanced Power Amplifier Design
- Antenna Design and Analysis
- Electromagnetic Simulation and Numerical Methods
- Advanced Data Storage Technologies
- Magnetic confinement fusion research
- Semiconductor Quantum Structures and Devices
- Advancements in PLL and VCO Technologies
- Millimeter-Wave Propagation and Modeling
- Precipitation Measurement and Analysis
- Lightning and Electromagnetic Phenomena
- Optical Coatings and Gratings
- Advanced Surface Polishing Techniques
- Radio Astronomy Observations and Technology
- CCD and CMOS Imaging Sensors
Michigan State University
2012-2025
Niowave (United States)
2009
National Superconducting Cyclotron Laboratory
2009
We show that the present approaches for solution of Maxwell’s equations in complex geometries have limitations can be overcome through use C(1)-continuous Hermite interpolation polynomials. Our approach calculating fields using finite element method yields better accuracy by several orders magnitude than comparable applications edge-based vector method. note is widely used pixelated solutions and ill-defined at nodes. a smooth representation within across elements well defined directions...
This paper uses field theory to derive the exact dispersion relation of space charge waves in a two-dimensional electron gas (2DEG) located dielectric or dissimilar waveguide. It is found that 2DEG can be modeled accurately using free-electron sheet model, which further confirmed by almost identical polarizability and with zero drift velocity. Transitions among well-known dispersion, beam mode vacuum electronics, Gould–Trivelpiece plasma physics are demonstrated varying density direct...
An 18–50 GHz mixer-first receiver implemented in 45-nm SOI CMOS is presented. The employs a differential quadrature coupler to split received signal into I/Q and provide broadband input match, two-phase double balanced passive mixer downconvert the signal, low-power inverter based LO driver with series resonance peaking flatten gain across frequency baseband LNA 2 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">nd</sup> order Sallen-Key low pass...
Raytheon Technologies teamed with Michigan State and Teledyne Scientific present a 16-element scalable AESA building block consisting of high efficiency InP HBT power amplifiers (PAs), low noise figure InGaAs HEMT Low Noise Amplifiers (LNA) integrated T/R switches, high-density tile interposer containing the TA1 Digital Tile, wideband antenna to meet MIDAS TA2 program goals. The architectural, device, assembly technology choices are presented Phase 1 results.
A self-structuring antenna (SSA) has been developed to enable scalable and rapidly upgradable phased array systems over broad tunable bandwidths. The SSAs are of a patch design, utilizing shorting pins distributed throughout the face control current distribution through switch activation. This paper describes SSA concept, design approach for this application, presents measured results two prototype designs.
We report here high-reflectivity multilayer DBR mirrors in 200-240 nm spectral region. YSZ (yttria-stabilized zirconia), HfO2 and SiO2 films were all prepared by direct RF magnetron sputtering. The film annealing conditions systematically varied to obtain layers with minimal optical absorption. Combining these results, high reflectivity YSZ/SiO2 HfO2/SiO2 DBRs designed realized reflectance greater than 99.9%.
Raytheon Technologies teamed with Michigan State University and Teledyne Scientific present a zero-IF, mixed-signal, 32-channel millimeter-wave CMOS transceiver design developed under the DARPA/MTO MIDAS program. The architectural choices, overview, measured results from two generations of ASIC development are presented. As part 3D T/R module, element-level digital beamforming provided by this will allow multiple simultaneous beams over wide field regard.
This paper contributes to fully additively manufactured packaged solutions for the integration of millimeter wave devices. We demonstrate viability building multiple dielectric layers achieve interconnects with greater heights. Being able use vertical space allows system be distributed over which more compact systems in horizontal space. Encased printed transmission lines minimal losses increased compactness future structures. Both iterations were designed 30 GHz and worst case saw a loss...