Loulit Tefera

Engineer in the USA. Currently working towards P.Eng. to be an engineer in Canada.

Spectrum Radio Frequency Engineer - Consultant; SME at Parymon Corp. (2024-03 – 2026-02)

Consultant providing expertise in spectrum sharing studies and ITU-R compliance assessment.

• Wrote MATLAB scripts to support the development of software for spectrum sharing studies:
• Modeled multiple antenna patterns
• Modeled clutter loss
• Read USGS terrain elevation data between two locations and incorporated existing software modeling interference loss
• Calculated power received due to sea surface scattering between a terrestrial transmitter and a satellite
• Assessed ITU-R (International Telecommunication Union - Radiocommunication Sector) WRC-27 Agenda Items of all Working Groups and compiled potential risks to NOAA's systems
• Extracted systems' documentation from text files to a Microsoft Excel workbook using Python

Research Assistant - Ultrafast Optics and Optical Fiber Communications Laboratory; Principal Investigator at Purdue University (2025-02 – 2025-12)

Part-time research assistant working on ultrafast optics and optical fiber communications projects.

• Generated second harmonic photons using a PPLN waveguide after testing different PPLN chips at different temperatures and frequencies
• Constructed an optical testbed, then used the alignment stages to couple into an AlGaAs chip
• Wrote a MATLAB script to simulate second harmonic generation and filtering, and to calculate the Schmidt number
• Reconnected and tested an autocorrelator that was built in-house
• Checked on the team's laboratory safety training completion

Radio Frequency Engineer at eSimplicity, Inc. (2021-02 – 2023-05)

Full-time RF Engineer focused on radiocommunication systems simulation and compatibility studies.

• Simulated radiocommunication systems on Visualyse for sharing compatibility studies between the radiolocation service and radio astronomy, aeronautical radionavigation, and Fixed Satellite Service (FSS)
• Verified the link budget analysis manually and wrote a report describing separation distances needed to avoid harmful interference to Air Force systems
• Attended and monitored ITU-R Working Parties on remote sensing systems (7C), land mobile service (5A), HF systems (5C), and IMT systems (5D)
• Generated multiple models of antenna patterns using MATLAB for my team's and my studies
• Drew drive routes and calculated link budgets to determine the best locations to transmit a signal to measure clutter loss using USGS NLCD data, Google Earth, Google Maps, and QGIS
• Supervised two university-level interns, trained them to complete their tasks successfully, and taught them the basics of RF Engineering and MATLAB

Electrical Engineer at ERT, Inc. (2019-04 – 2020-03)

Full-time Electrical Engineer working on Radio Frequency Interference Monitoring System testing and evaluation.

• Participated in and presented the results of the first system capability test on the Radio Frequency Interference Monitoring System (RFIMS)
• Analyzed data from all tests and supported the search for the location of an interfering signal
• Identified and recommended areas of improvement in Factory Acceptance Test (FAT) and Site Acceptance Test (SAT) test cases
• Mapped requirements to use cases for Test and Evaluation Master Plan (TEMP)
• Participated in and helped create the Engineering Review Board (ERB) for the RFIMS

Projects in RF Circuit Design, Active and Passive Components at Purdue University (2025-08 – 2025-12)

Projects completed in a graduate course on RF Circuit Design at Purdue University.

• Designed a low noise amplifier and associated matching networks, then simulated the analog circuit and layout on Keysight ADS
• Designed both ideal and non-ideal microstrip Chebyshev filters, then simulated the analog circuit, layout, and performed an EM co-simulation on Keysight ADS
• Designed the analog circuit of a receiver chain and simulated it on Keysight ADS
• Designed the analog circuit of a matching network for an antenna and a load impedance and simulated it on Keysight ADS

B.S. in Electrical Engineering – University of Maryland, College Park (2017-12)