Satellite communications and sensors

Ground station architectures for communications systems and sensors.

Principal RF Systems Engineer. Derived subsystem requirements and wrote interface control documents for Ground Based Missile Warning Radar and deep space tracking programs (large phased arrays).• Analyzed Phased Array Radar system design, modernization, integration and test.• Performed requirements analysis and development for hardware and software components.• Transmitter, Receiver, amplifier and RF distribution modeling and design using ADS, SPICE and Microwave Office.

• Led proposal efforts for new business development including technical volume and allocating tasks and labor hours• COMINT requirements derivation and system architecture design including RF distribution for DF and copy• Cascade analysis of RF distribution including NF, dynamic range, G/T, RIP, sensitivity, IIP3 and gain• Modeling and simulation of DF antennas on aircraft using FEKO software package • Antenna design and EMI mitigation for a man portable DF system. Resolved co-site issues with vehicle and man-pack configurations. Wrote CONOPS, BDTM, System Subsystem Specification and antenna trade study.

Derived subsystem requirements and wrote interface control documents for a $40 million classified SIGINT processing system. Planned and assigned program tasks and budget. Supervised 4 engineers.ELINT, COMINT and PROFORMA requirements derivation and system architecture designAssigned verification methods to requirements in RVTMWrote technical volume of RFP response2002-2007

Designed system architecture for high altitude (68,000') reconnaissance platform. Wrote system requirements for all subsystems and platform integration. Planned and assigned program tasks and budget. Supervised 4 engineers.Designed Command & Control architectureIdentified operational limitations and constraints including Size, Weight & PowerWrote heating/cooling trade for high altitude payload baysCalculated link budgets for SATCOM and Line of Sight apertures (including SATCOM FCC 2 degree spacing)Airship vs. Fixed wing Unmanned Aerial Vehicle trade studyEMI/EMC analysis of apertures on platformCDMA & FDMA target signal interception and data processingWrote system requirements, Interface Control Documents (ICD), test plans and demonstration procedures for Embraer reconnaissance aircraft at Lockheed. Co-wrote proposal to win 3 billion dollar program.Wrote Narrowband Communications System (LOS & SATCOM) requirements and ICDsDesigned multi-level security mission ICS (Interphone Communications System) Wrote Integration & Test of Communications System including RVTM and FAA certificationAuthored narrowband radio missionization trade studyAuthored white paper on UHF SATCOM transition from UFO to MUOS satellitesWrote requirements for airframe and airplane systems integration including avionics package (RTCA/DO-160 cert.

Product Test & Qualification Lab. Tested CATV plant equipment (5 MHz - 1 GHz) including fiber optic nodes, optical transmitters, optical receivers, EDFA's, DWDM optical multiplexers and demultiplexers, RF amplifiers, taps, connectors, cable and tools. Expertise in multiple cable plant architecture design and test. Tests include: optical isolation, optical coupling, optical crosstalk, Noise Power Ratio, downstream performance (CNR, CSO & CTB), group delay, insertion loss, return loss, gain return loss, surge, environmental, BER, hum mod, QAM, QPSK modulation and video testing. Authored hundreds of detailed test methods, test plans and test reports on equipment failures. 75% of products tested had at least one major performance failure.Saved the company millions of dollars in cable plant upgrade costs by identifying inferior equipment before a purchasing decision was made by VP of Engineering & CTO and reported back to vendors so that they could improve their product accordingly.Tested cable telephony equipment including customer premise and headend devices.System design and test for satellite uplink/downlink earth stations and microwave system for video. Evaluated designs from several vendors and supervised installation of two 13 meter 18 GHz DBS antennas. Selection and negotiation process saved the company $2 million.Rain fade analysis and C++ program for Ku band satellite earth station antennas to determine the appropriate downlink dish size for the geographic rain region to attain 99.999% reliability. The company had 400-500 headends so several million dollars were saved by purchasing the minimum required size.Ku and C-Band Ground station system uplink and downlink design for commercial satellites. VSAT design and analysis.Fiber optic system design and test of SONET equipment. Microwave link design at common carrier frequencies. Fault alarm monitoring and control of microwave sites.

Designed and tested low observable (stealth) technologies for jet engines on a variety of aircraft. Ambient and high temperature dielectric measurements in waveguide, coax, stripline and free space (using NRL arch). Supervised three technicians and directed testing.Designed, built and managed $800K radar certification system for measuring 3-dimensional RCS (radar cross section) images of jet engines from 2-18 GHz. Anechoic chamber design 2-18 GHz.

Designed and tested RF & microwave measurement systems.Swept frequency RADAR design and development from 100 MHz to 60 GHz.Designed, operated and maintained several network analyzer-based measurement systems and anechoic chambers. Wrote software code to control various test equipment and to perform measurements.Responsible for design and development of microwave hardware for these unique measurement systems and repaired them to the component level.Designed, built and tested a 37-element circular waveguide phased array antenna including the stripline feed network with circular polarization for satellite applications.

Designed, developed, tested and built analog & digital printed circuit cards and antennas. Designed, built and tested a cavity-backed antenna for operation at 2.4 GHz with a variety of dielectric loading and feed schemes for optimal bandwidth.Designed, developed and tested analog and digital printed circuit cards for a high speed digitizing receiver/recorder.