Investigating the effect OF IRR coating on in vehicle cellular performance through EM simulation

2017 ◽  
Author(s):  
E. Kowalczuk ◽  
P. Phillips
Keyword(s):  
Em Simulation

scholarly journals Three Phase Resolution Transmitarray Element for Electronically Reconfigurable Transmitarrays

2019 ◽  
Vol 2019 (2) ◽  
pp. 106-113
Author(s):  
Nguyễn Minh Thiện ◽  
Nguyễn Hữu Minh ◽  
Nguyễn Bình Dương
Keyword(s):  
Phase Change ◽  
Phase State ◽  
Main Beam ◽  
System A ◽  
Full Wave ◽  
Three Phase ◽  
Phase Resolution ◽  
Waveguide System ◽  
Em Simulation ◽  
And Performance

Electrical beam scanning is a feature enabling an antenna array to electrically control its main beam toward a desired direction. In this paper, a three-phase state element for electronically reconfigurable transmitarrays is presented. The element is made up of C-patches and modified ring slots loaded rectangular gaps. By controlling the bias state of four p-i-n diodes, three phase states are obtained. The dimension of the element is optimized by using full-wave EM simulation and performance of the element is validated by both simulation and an experimental waveguide system. A transmitarrayconsistingof12×12elementshasbeensimulated to validate the steering capabilities. Experimental results indicate the element has good characteristics and excellent phase change capabilities.

Frequency Bandwidth Adjustment by Precision Post-Processing for a 0.78–0.95 THz Band SIS Mixer

2015 ◽  
Vol 643 ◽  
pp. 157-163
Author(s):  
Akihira Miyachi ◽  
Takafumi Kojima ◽  
Yasunori Fujii ◽  
Masanori Takeda ◽  
Yoshinori Uzawa ◽  
...  
Keyword(s):  
Mass Production ◽  
Noise Temperature ◽  
Back Side ◽  
Frequency Bandwidth ◽  
Post Processing ◽  
Sis Mixer ◽  
Optimal Method ◽  
High Frequencies ◽  
Em Simulation ◽  
The Relationship

In this study, we demonstrate a method for adjusting the frequency bandwidth of a Superconductor-insulator-superconductor (SIS) mixer device by controlling its thickness after microfabrication. We estimate the relationship between SIS mixer device thickness and frequency bandwidth using electromagnetic (EM) simulation. We propose an optimal method for the precision polishing of the back side of the device. We evaluate the noise temperature and measure the frequency bandwidth of SIS mixer devices with different thicknesses. This study presents the adjustment of the frequency bandwidth of a device through controlling its thickness after microfabrication. This technique may improve the yield of SIS mixer device mass production and support the construction of receivers for ultra-high frequencies such as Atacama Large Millimeter/Submillimeter Array (ALMA) Band 10.

scholarly journals EM simulation assisted parameter extraction for transferred-substrate InP HBT modeling

2018 ◽  
Vol 10 (5-6) ◽  
pp. 700-708 ◽  
Author(s):  
Tom K. Johansen ◽  
Ralf Doerner ◽  
Nils Weimann ◽  
Maruf Hossain ◽  
Viktor Krozer ◽  
...  
Keyword(s):  
Extraction Procedure ◽  
Three Dimensional ◽  
Parameter Extraction ◽  
Calibration Procedure ◽  
Small Signal ◽  
Signal Model ◽  
Active Device ◽  
Signal Prediction ◽  
Small Signal Model ◽  
Em Simulation

AbstractIn this paper, an electromagnetic (EM) simulation assisted parameter extraction procedure is demonstrated for accurate modeling of down-scaled transferred-substrate InP HBTs. The external parasitic network associated with via transitions and device electrodes is carefully extracted from calibrated three-dimensional EM simulations up to 325 GHz. Following an on-wafer multi-line Through-Reflect-Line calibration procedure, the external parasitic network is de-embedded from the transistor measurements and the active device parameters are extracted in a reliable way. The small-signal model structure augmented with the distributed parasitic network provides accurate small-signal prediction up to 220 GHz.

scholarly journals LO13: Development of a national, standardized simulation case template

CJEM ◽  
2020 ◽  
Vol 22 (S1) ◽  
pp. S11-S11 ◽  
Author(s):  
J. Baylis ◽  
C. Heyd ◽  
B. Thoma ◽  
A. Hall ◽  
T. Chaplin ◽  
...  
Keyword(s):  
Thematic Analysis ◽  
Nominal Group Technique ◽  
Assessment Tools ◽  
Nominal Group ◽  
Free Text ◽  
Major Barrier ◽  
Canadian Medical School ◽  
Starting Point ◽  
Simulation Based ◽  
Em Simulation

Innovation Concept: A major barrier to the development of a national simulation case repository and multi-site simulation research is the lack of a standardized national case template. This issue was recently identified as a priority research topic for Canadian simulation based education (SBE) research in emergency medicine (EM). We partnered with the EM Simulation Education Researchers Collaborative (EM-SERC) to develop a national simulation template. Methods: The EM Sim Cases template was chosen as a starting point for the consensus process. We generated feedback on the template using a three-phase modified nominal group technique. Members of the EM-SERC mailing list were consulted, which included 20 EM simulation educators from every Canadian medical school except Northern Ontario School of Medicine and Memorial University. When comments conflicted, the sentiment with more comments in favour was incorporated. Curriculum, Tool or Material: In phase one we sought free-text feedback on the EM Sim Cases template via email. We received 65 comments from 11 respondents. An inductive thematic analysis identified four major themes (formatting, objectives, debriefing, and assessment tools). In phase two we sought free-text feedback on the revised template via email. A second thematic analysis on 40 comments from 12 respondents identified three broad themes (formatting, objectives, and debriefing). In phase three we sought feedback on the penultimate template via focus groups with simulation educators and technologists at multiple Canadian universities. This phase generated 98 specific comments which were grouped according to the section of the template being discussed and used to develop the final template (posted on emsimcases.com). Conclusion: We describe a national consensus-building process which resulted in a simulation case template endorsed by simulation educators from across Canada. This template has the potential to: 1. Reduce the replication of effort across sites by facilitating the sharing of simulation cases. 2. Enable national collaboration on the development of both simulation cases and curricula. 3. Facilitate multi centre simulation-based research by removing confounders related to the local adoption of an unfamiliar case template. This could improve the rigour and validity of these studies by reducing inter-site variability. 4. Increase the validity of any simulation scenarios developed for use in national high-stakes assessment.

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