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Stephen L. | Elance
 
176985602337900
Last Sign-in: Apr 18, 2015

Stephen L.

RF, Wireless & System Engineer
   United States
  |   Waltham, MA

Overview

Minimum Hourly Rate $90

Radio frequency, wireless & system design solutions for high reliability electronics

Strong analytic and problem solving skills in support of creative thinking allow product tradeoffs evaluated against selection criteria, strengths, and weaknesses resulting in risk managed solutions for high reliability products.

Key performance metrics include providing detailed reports; product and electrical requirements; system thinking; providing competitive differentiators; capturing and generating intellectual property; meeting time and schedule...

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Portfolio

AutoAlert Help Button and Communicator System design, in home prorogation studies,...
RF system design, low pwr ISM 15.249 radios; quad band GSM, WiFi, and GPS enabled...
Undertook LSAR (L-band synthetic aperture radar) T/R module feasibility study to show...
An analysis was completed on the choice of power FET's for an 8GHz 5 stage, 5W power...
Design through to proto-flight of VHF, UHF, L_Band and MIC narrow band amplifiers;...
Development within Military Communications Div on Scimitar VHF manpack radio...
Whilst not the RF module, this illustartes the type of construction used for the...
Developed method to in measure small values of jitter (< 4ps) for the alignement of...
Feasibility through to production including RF hardware and layout.
Overcame production yield and design constraints on the TBS202 Base Station. Design and...
Determined gain stability of ACE+ transmitter and receiver (radiometer) architecture...
http://www.sat.ltu.se/projects/occultation/acep.php
Globalstar satellite communications system payphone/subscriber unit - feasibility study...
Inmarsat 4 Synchronous Clock Thick/Thin film hybrid ADS layout and momentum simulation...
Design of UHF(420-470MHz) synthesiser and VCO for a personal radio. The work included...
Responsible for all aspects of GSM side of a dual mode dual band mobile phone...
The bottom section of the picture shows multi layer PCB and screening arrangement for...

Skills (10)

Tested
Wireless
RF
Research
RF solutions for location based systems
development
FCC requirement and frequency selection
Geofencing Stratergies
New product development
Technology Road Mapping

Service Description

RF, microwave, wirless, hardware, R&D;
Transceiver, basestation, handset & wearables;
System & subsystem integration;
Analog, digital, power supply & interface design
System analysis, proporgation studies & link budgets,
Fixed and portable antenna design; NFC;
Selection and application of RF regulatory requirements;
Production of requirements/test specification;
Linear and non linear ADS circuit modeling, Momentum layout, and CST
Commercial, medical, military and aerospace projects.


SUMMARY Location capable wrist worn wearable within FDA 60601 environment. Includes cellular radio, WiFi, and GPS solution compliant to AT&T OTA 13340;

Personal emergency help button with integrated GSM/WiFi/GPS;

Microwave Integrated Circuits (MIC) and Ceramic Hybrids to aerospace standards using microstrip and stripline techniques - UHF/L/X band;

Satallite Up/Down converters, and T/R module design to aerospace design rules;

RFIC management, problem solving, specification & trade offs for synthesier/Mixers;

Simens Dual mode GSM/IS136 mobile phone receiver design;

Globalstar satellite communications FAU - feasibility and LNA/receiver design;

High yield low cost design; Surface mount techniques and multi layer RF Boards;

Police personal mobile radio (PMR) VHF/UHF; Military frequency agile manpack radio VHF; VHF/UHF Synthesiser design for analogue FM & digital MSK/GMSK;

Military Manpack Radio - Frequency agile tuners, front ends, LNA's, VCO's, mixers, IF amplifiers, SAW filters,...

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Education

Portsmouth University
MSc in Information Systems
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Overview  |  Job History  |  Portfolio  |  Resume/C.V.

Keywords

RF
radio frequency
wireless
microwave
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sledingham
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Stephen L. | Elance

Stephen L.