NOTICE OF JOB OPENING
MULTIPLE POSITIONS
Electrical Engineer (Bioinformatics Researcher): Job Duties: Assist in developing methodologies, computational models & relevant programming modules to assess wireless communication channel characteristics for wearables, implants & ingestible electronics. Create appropriate computational models necessary to conduct the study of the target applications. Develop computational models, methodologies, & Matlab codes.
Specifically:
- Determine methodologies to generate 3D computational models of the human lungs including the impact of fluid accumulation in patients with pulmonary edema. This sequence of models will be used to investigate impact of the electrical properties of the lungs tissue on the wireless channel between two wearable antennas. The models shall include a parameter indicating the amount of accumulated fluid.
- Determine a sequence of simulation scenarios including the lungs computational model & customized wearable antennas for MedRadio frequency band (401-406 MHz). After determining the best locations for the antennas, the sequence of scenarios includes lungs with varying degrees of fluid.
- Perform various simulations using ANSYS HFSS to verify wearable antenna matching with the human body & obtain the channel frequency response (i.e., forward coefficient parameter S21).
- Determine methodologies for existence of creeping waves around the human torso, & its possible impact on the line-of-sight signal passing through the lungs. This could involve studying pointing vector data to determine the directions of RF energy flow.
- Develop Matlab codes to analyze S21 data dependence on the parameter representing fluid accumulation in the lungs. The code shall also obtain the impulse response of the wireless channel using inverse Fourier transform to study the dependence of time response to fluid accumulation.
- Provide a detailed report including all technical findings i.e., computational model construction, antenna characteristics, simulation scenarios, S21 graphs versus frequency & time responses for various fluid accumulation percentage.
- Determine methodologies to generate 3D computational models of liquid phantom environment including the dielectric property of the liquids used preferably for the frequency range of 10 to 100 MHz. This model will be used to investigate the feasibility of electric field communication for implants & or ingestible electronics. The computational model shall include transmitting & receiving electrodes.
- Use liquid phantom model, to perform various simulations with ANSYS HFSS (electromagnetic solver) to obtain the channel frequency response (i.e., forward coefficient parameter S21) & electric field intensity for various distances between transmitter & receiver electrodes. Create Simulations to study the impact of the implant electrode orientation.
- Determine the values of FEM-based parasitic parameters of the electrodes that best match a sequence of identical physical experiments with liquid phantom. Assist in finding a methodology that identifies the values of the parasitic parameters.
- Use the whole human body model to perform simulations with ANSYS HFSS (electromagnetic solver) to obtain the channel frequency response (i.e., forward coefficient parameter S21) & electric field intensity for various distances between transmitter & receiver electrodes. Create simulations to study impact of implant electrode orientation.
- Develop Matlab code to analyze S21 dependence on distance between transmitter & receiver electrodes. Compare results with those obtained through liquid phantom & explain & evaluate discrepancies. Generate 3D vector field of electric field intensity inside & over the surface of the human body model to obtain a better understanding of the signal path inside the body.
- Provide a detailed report including all technical findings i.e. liquid phantom computational model construction, electrodes characteristics, simulation scenarios, S21 graphs versus frequency, & possible impact or electrode orientations.
Requirements: Bachelor’s or equivalent in Electrical Engineering, information Technology, or related and 2 years of experience in/with: 1) wireless communications in body area networks (familiarity with IEEE802.15.6); 2) computational human body models, Electric Field Communication, modeling biological tissues and liquid phantoms; and 3) ANSYS HFSS software package. Additionally, all candidates must possess working knowledge of MATLAB programming environment and modular and efficient programming experience. Position is based out of 1100 Bonifant St., Ste 310, Silver Spring MD 20910 and may require relocation to various unanticipated locations throughout the United States. Min. Rate of Pay: $59,613.00/year. Qualified applicants please submit resume to recruitment@dakota-consulting.com or HR Manager, Dakota Consulting, Inc., 1110 Bonifant Street, Suite 310, Silver Spring, MD 20910.
