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Full-Text Articles in Engineering
Vhf Near Field Antenna Design For Wireless Sensing Applications In Harsh Environments, Nicholas Aiken
Vhf Near Field Antenna Design For Wireless Sensing Applications In Harsh Environments, Nicholas Aiken
Honors College
High temperature sensors that can operate up to 1000 °C or beyond are in high demand for defense, aerospace, energy exploration and power industries. Wired sensors for high temperature operation has low reliability and high installation costs. Wireless communication provides functionality for operation in harsh environments. Wireless communication in harsh environments must be battery-free because semiconductor electronics is unable to operate beyond a few hundred degrees Celsius and there is a very limited number of alternatives for energy storage at extreme temperatures. The University of Maine’s Microwave Acoustics Laboratory (MAL) group has developed Surface Acoustic Wave (SAW) devices which can …
Using Tem Cell Measurements To Estimate The Maximum Radiation From Pcbs With Cables Due To Magnetic Field Coupling, Shaowei Deng, Todd H. Hubing, Daryl G. Beetner
Using Tem Cell Measurements To Estimate The Maximum Radiation From Pcbs With Cables Due To Magnetic Field Coupling, Shaowei Deng, Todd H. Hubing, Daryl G. Beetner
Electrical and Computer Engineering Faculty Research & Creative Works
Common-mode currents can be induced on cables attached to printed circuit boards (PCBs) due to electric and magnetic field coupling. This paper describes a technique for using transverse electromagnetic (TEM) cell measurements to obtain an effective common-mode voltage (or magnetic moment) that quantifies the ability of traces and integrated circuits on PCBs to drive common-mode currents onto cables due to magnetic field coupling. This equivalent common-mode voltage can be used to reduce the complexity of full-wave models that calculate the radiated emissions from a system containing the board. It can also be used without full-wave modeling to provide a …
Considerations For Magnetic-Field Coupling Resulting In Radiated Emi, David M. Hockanson, James L. Drewniak, Richard E. Dubroff, Todd H. Hubing, Thomas Van Doren
Considerations For Magnetic-Field Coupling Resulting In Radiated Emi, David M. Hockanson, James L. Drewniak, Richard E. Dubroff, Todd H. Hubing, Thomas Van Doren
Electrical and Computer Engineering Faculty Research & Creative Works
Parasitic inductance in printed circuit board geometries can worsen the EMI performance and signal integrity of high-speed digital designs. Partial-inductance theory is a powerful tool for analyzing inductance issues in signal integrity. However, partial inductances may not adequately model magnetic flux coupling to EMI antennas because the EMI antennas are typically open loops. Therefore, partial inductances may not always accurately predict radiated EMI from noise sources, unless used in a full-wave analysis such as PEEC. Partial inductances can be used, however, to estimate branch inductances, which can be used to predict EMI. This paper presents a method for decomposing loop …
Stop That Noise, Thomas Van Doren, Todd H. Hubing, Fei Sha, James L. Drewniak, David M. Hockanson
Stop That Noise, Thomas Van Doren, Todd H. Hubing, Fei Sha, James L. Drewniak, David M. Hockanson
Electrical and Computer Engineering Faculty Research & Creative Works
The authors discuss electromagnetic compatibility (EMC) and electromagnetic interference (EMI). After a brief look at the causes of EMI, they describe conductive coupling and electromagnetic radiative coupling. Career opportunities in EMC problem solving are looked at.