Matthew Ramberg

Experience

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  Physics Department, University of Wisconsin - La Crosse

  May 2005 - Apr 2006

  Undergraduate Research Assistant

  As a lab assistant, I: helped calibrated an optically-pumped molecular laser (OPML) system; searched for far-infrared emissions from optically-pumped CH2DOH; and measured wavelengths and offsets for both previously-observed and newly-discovered emissions. The resulting work was published in Applied Physics B, and I presented on the research at undergraduate research fair. I also assisted and supervised peers in calibrating CO2 lasers, making cavity scans, and measuring emission wavelengths.

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  ITS Department, University of Wisconsin - La Crosse

  Sept 2005 - May 2006

  Computer Lab Consultant

  As a Computer Lab Consultant, I assisted students and faculty with computer-related questions and concerns. I opened, closed, and maintained lab areas, and supervised computer lab use. During this time I was exposed to and learned new software through assisting students/faculty in troubleshooting problems.

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  FedEx Express

  Jul 2006 - Sept 2006

  Package Handler

  The primary task of this position was to download and sort packages from freight trucks according to delivery dates at the Minneapolis-St. Paul airport location. After three weeks I was placed in charge of organizing and downloading semi-truck trailers. Before leaving for school-related reasons, I assisted in training my replacement.

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  Netherland, Sewell & Associates

  Jul 2008 - Jul 2011

  Senior Petroleum Analyst

  As part of the Petrophysics team, I Interpreted well logs and core data in order to provide statistics for in-place and reserve estimates. Throughout my time at NSAI, I applied mathematics, physics, general engineering principles, and even programming knowledge to develop, build on, and justify models for interpretation. I developed or built upon my understanding of geology, petrophysics, chemistry and petroleum engineering. During this time, I analyzed fields of many types: from exploratory drilling projects to proved resources, onshore to deep water, and in various clastic and carbonate formations. As part of my experience, I studied oil and gas reservoirs all over the world, especially North and South America, and Southeast Asia. My work focused on capillary pressure modeling, tight gas sands in Wyoming, and oil-bearing, fractured limestones in the Gulf of Mexico. Show less

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  Qorvo, Inc. (formerly TriQuint Semiconductor)

  Jan 2013 - Oct 2019

  Senior Applications Engineer

  Supported customers, designers and marketing of GaN high power amplifiers for the base station market. Designed Doherty amplifier PCBs in ADS, and heat sinks in SolidWorks and AutoCAD. Circuits designed around both plastic overmold and air cavity ceramic packaging. Tested module, driver and Doherty evaluation boards using pulsed and modulated (LTE and WCDMA) signals. Performed single- and multi-carrier DPD testing on multiple platforms, including Xilinx and National Instruments/NanoSemi systems both for customers and internal design verification. Provided troubleshooting and feedback for top tier customers, including special one-off testing using network analyzers, function generators, signal/spectrum analyzers, and creating multi-carrier waveforms on signal generators. Performed and supported load pull testing on passive, VNA-assisted, and active systems--on both Focus and Maury setups. Helped setup a DPD load pull test bench. Created data sheets for product launches, which included generating figures, calculating thermal resistances, product limits, mechanical specifications, material compliance, and general quality control. Trained other engineers, including field and entry level team members in Doherty design and DPD testing. Design and testing space typically fell between 1.8 and 3.8 GHz, and anywhere from 3 W massive MIMO modules to greater than 40 W average power Doherty circuits.Prior to the merger with RFMD, I was a Product Applications Engineer for TriQuint Semiconductor, and an RF Applications Engineering Intern (contracted through Volt). Show less

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  Sumitomo Electric Device Innovations USA, Inc.

  Oct 2019 - Oct 2023

  RF Design Engineer

  Researched, purchased, set up and maintained a high-power bench for RF testing. Through this, I gained a deeper knowledge of a variety of test equipment, including Rohde & Schwarz signal generators, spectrum analyzers and oscilloscopes; and Keysight DC supplies and power meters (among other equipment). All of which were linked through GPIB and ethernet connections, and controlled using custom LabVIEW software. In addition to this, I led and assisted with design and testing of GaN high power amplifiers for base stations--from drivers of 5 W (at antenna) massive MIMO systems to 100 W average power Doherty circuits. PCB designs were done in AWR/Microwave Office, and frequencies range typically from UHF to C-band (0.6 - 4.0 GHz). Testing included pulsed CW and LTE-modulated power sweeps, video bandwidth, AM/PM, and 5G NR DPD testing. Test fixtures included single-stage evaluation boards, to BTS radio heads including full lineups of driver, Doherty, circulators, etc. The primary purpose of this position was to provide direct technical support and designs to RF and systems engineers, and assist with the interface between the customer and Sumitomo device designers. Show less

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  Collins Aerospace

  Oct 2023 - now

  Senior Product Component Engineer

  Assist design engineers with adding components from approved vendors to parts database for engineering and production level projects. Responsible for BOM reviews during design and re-design stages, maximizing preferred part selection, and minimizing obsolescence for the MiS SBU.