The state of the art advanced developments of series-resonant high-frequency inverter using static induction transistors/power modules

2002 ◽  
Author(s):  
H. Ogiwara ◽  
S. Nagai ◽  
M. Nakaoka ◽  
S. Hamada
Keyword(s):  
High Frequency ◽  
State Of The Art ◽  
The State ◽  
Static Induction Transistors ◽  
Power Modules ◽  
Series Resonant ◽  
Static Induction ◽  
Frequency Inverter

scholarly journals Switchable DBR Filters Using Semiconductor Distributed Doped Areas (ScDDAs)

Electronics ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 2021
Author(s):  
Rozenn Allanic ◽  
Denis Le Berre ◽  
Cédric Quendo ◽  
David Chouteau ◽  
Virginie Grimal ◽  
...  
Keyword(s):  
High Frequency ◽  
Degrees Of Freedom ◽  
State Of The Art ◽  
Active Surface ◽  
The State ◽  
Semiconductor Substrate ◽  
Great Flexibility ◽  
Active Elements ◽  
Insertion Losses ◽  
Good Agreement

This paper presents a novel way to switch dual-behavior resonator (DBR) filters without any additional active surface-mount components. By using a semiconductor substrate, we were able to simultaneously co-design the filters and semiconductor distributed doped areas (ScDDAs) with integrated N+PP+ junctions as active elements. These ScDDAs act as electrical vias in the substrate, which makes it possible to have an open-circuited resonator in the OFF state and a short-circuited resonator in the ON state, and, consequently, to control the transmission zeroes of the filters. This method offers degrees of freedom as the dimensions and positions of these doped areas can be chosen to obtain the best performances. In this study, four filters were simulated and fabricated to spotlight different possibilities for the dimensions and positions of the ScDDA to control the low- or high-frequency transmission zero of the filters. The simulations were in very good agreement with the measured results. All the filters present insertion losses lower than 2 dB in the OFF and ON states, a great flexibility in the frequency choice, and good agility compared with the state of the art.

A Novel Strategy for the Identification of Radiation Force Models

2014 ◽  
Author(s):  
Roman M. Janssen ◽  
Henk Jansen ◽  
Jan-Willem van Wingerden
Keyword(s):  
Asymptotic Behavior ◽  
Frequency Domain ◽  
High Frequency ◽  
State Of The Art ◽  
Radiation Force ◽  
The State ◽  
Test Cases ◽  
Subspace Identification ◽  
Domain Identification

A novel frequency domain identification (FDI) strategy for the identification of radiation force models from frequency domain hydrodynamic data is proposed. First, a subspace identification method is augmented with a convex constraint that guarantees a stable solution. Then, in a second convex optimization problem, constraints on low- and high frequency asymptotic behavior and passivity are enforced. This novel method, constrained frequency domain subspace identification (CFDSI), is validated by comparing both SISO and MIMO CFDSI results with the state-of-the-art FDI toolbox, which is part of the Marine Systems Simulator MATLAB toolbox. In two test cases, it is shown that the novel algorithm can successfully identify a model with either a SISO or MIMO structure, where stability, passivity and the desired low- and high-frequency asymptotic behavior are guaranteed. For the two test cases presented, the quality of the CFDSI models matches the quality of the state-of-the-art FDI models.

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