Resume of Chris Nadovich

1302 Diamond Street, Sellersville, PA 18960 USA
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Chris Nadovich is a systems designer, developer, and project engineer with diverse experience. He works as an independent consultant to undertake various multidisciplinary engineering efforts with an emphasis on RF, Analog, and Digital signal processing.

Nadovich's areas of expertise are:

Skill-Set Key Words

3D A/D APL ATE ATML Adaptive Adaptive-Array Analog Analyzer Antenna Apache Aperture Assembler AUT Board Beamformer BER BSD Broadband Butterworth C C++ CAD Capacitor CASS Cellular Chirp Circuit Clearance CLR Chebyshev Commercial Compact-Range Control Convolution D/A DAC Design Delay DF Dipole DNS DSP Digital ECCM ECM EMC Embedded EMI Feed FET FCC FIR Filter FORTH Fourier FPGA Firmware Gaussian GCC GPS 68HC11 High-Power HFSS HTML HF Horn IIR ISAR ISP Impedance Internet Inductor Instrument Integral ISM IVI JPEG Lab LabView LabWindows Laplace Laser Linux Measurement Microstrip MIMO MPEG MUSIC Mathematica Matching Matlab Metrology Microwave Millimeter-Wave Microcontroller Military Monopulse MySQL Network Neuron NTSC Numerical Op-Amp PC104 PAL PCB PHP Part-15 Perl Positioner Phase Phased-Array Pulse PWB RF Radar RCS Resistor Reactance Reflection Reflector SAR Scalar Sensor Smart-Antenna Software Spread-Spectrum Stripline Surface-Mount Super-Resolution Synthesizer Synthetic Systems TCP/IP Test TeX TMS-320 Theodolite TR-Module UART UHF VHF Verilog Velodrome Video VHDL Verilog VSWR WLAN Wi-Fi Waveguide X-band Xilinx Yagi XML Z-World Z80 2G 3G 8051 6805

BIOGRAPHY

Nadovich received BSEE and MEEE degrees from Rensselaer Polytechnic Institute in 1981 with specialty in network theory and numerical analysis.

After graduation, he worked in industry, serving as lead engineer guiding ground-up development of a number of sophisticated signal processing systems, including SuperResolution Direction Finding systems, Microwave and RF Measurement systems, and specialized Monopulse and SAR radars. This work gave him extensive experience in both hardware and software, including RF/Analog design, test, and measurement from DC to 94 GHz, and real time DSP using high performance digital systems and embedded software.

While working in industry as an engineer, Nadovich was also a competitive bicycle racer. In 1994, Nadovich, united his skills as an engineer with his love for bicycle racing when in he designed the velodrome for the 1996 Olympic Games. The 250 meter track has 42 degree banking in the curves and a proprietary shape designed by Nadovich using a hybrid symbolic/numerical model implemented in Mathematica and based on the theory of the Fresnel integral. The track was temporarily installed at the Stone Mountain Cycling and Archery Venue near Atlanta Georgia for use in the 1996 Olympic games. To date, Nadovich has been the designer of 7 velodromes worldwide.

Buy at Amazon Since then Nadovich has continued his work in RF and Microwave engineering as an independent consultant, along with several Internet related projects for the ISP he owns, JTAN.COM. He has written a book: Synthetic Instruments, Concepts and Applications published by Elsevier in 2004.

These days, Nadovich is Director of Laboratories at Lafayette College in Easton, PA.

RF, ANALOG, AND MICROWAVE SYSTEMS

Graco, Exton, PA, 2005

Consulted on FCC Part 15 Certification issues for an intentional-radiator product.

Orbit/FR, Horsham, PA, 2005

Project Engineer coordinating the installation of new Compact Range equipment, including a multi-band scalar feed carousel, and a multi-segment machined aluminum reflector. Work included survey, installation, laser alignment, and RF field probing the final system.

Schulmerich Bells, Sellersville, PA, 2004

Consulted on FCC Part 15, IC, and EC Certification issues for intentional-radiator products. Designed various antennas for hand held wireless products.

Access Research, St Louis, MO, 2003

Designed a propagation channel simulator matrix for automated testing of multiple RF communications devices.

Lambda Sciences, Villanova, PA, 2002

Designed an L-band multi-channel phase tracking radar receiver.

KVH Industries, Middletown, RI, 2001

Designed a low cost X-band LNA for a commercial phased array application.

Lambda Sciences, Villanova, PA, 2001

Designed a 6 channel X-band receiver for a switched SAR/Chirp instrumentation radar.

Aeroflex-Lintek, Powell, OH, 2000

Designed numerous RF upconverter and downconverter circuits in microstrip as part of an overall redesign of an RF instrumentation system.

Invented and refined a new stimulus architecture for RF Test. Participated in the development of a hardware demonstration for this new Stimulus system.

UNDISCLOSED 1999
Client Details on Request

Evaluated the feasibility of a ground-to-ground short range target tracking system. Developed a prototype system and used that system to measure actual propagation and blockage diffraction effects from UHF to X band.

AEROFLEX LINTEK, Powell, OH, 1997 - 1998

Consulting systems engineer in support of a successful effort to develop and market a next-generation automated test instrument. Was a key software and hardware architect of this system and participated in numerous technical and marketing decisions based on extensive conversations with customers and in collaboration with sales and engineering personnel.

FLAM & RUSSELL, INC, Horsham, PA, 1984 - 1996

R&D Engineer in charge of custom hardware development. Developed a W-Band (94 GHz) radar transceiver for a Compact RCS range, and a 68HC11 based control system for UHF high power amplifiers.

Lead engineer that guided the development of a transportable X-band SAR imaging system and a transportable X-band, monopulse instrumentation radar. Was responsible for coordinating the RF, video, digital, mechanical, and software efforts required to build these radars. And was the primary author of the winning proposals that resulted in this $4+ million dollars of business.

In other programs, he served as systems engineer for a pair of 10 kW UHF helix arrays, positioners, tower, and concrete foundation delivered to NASA for use as a command antenna system. He designed and supervised the construction of the RF hardware for a three-element adaptive antenna array, with custom circuitry including a four-channel, phase coherent receiver system and a broadband, adaptive, analog beamformer. He participated in experiments to investigate the feasibility of MOM or PN junction millimeter wave and infrared mixers. And he made significant contributions to the development of the RCS imaging software sold by Flam & Russell, particularly in the area of image RCS calibration and time domain processing.

ULTRAFAST CORPORATION, Malvern, PA, 1995

Analog design consultant supporting the introduction of a new, enhanced version of an ultrasound system for measuring the torque applied to fasteners. Consulted on transceiver design and the design of matching networks.

FAIRCHILD WESTON, Sarasota, FL, 1986 to 1987

Developed a UHF telemetry data link for use in a remotely piloted vehicle to downlink digitized surveillance video. Work involved design of microstrip and stripline circuitry, including an agile varactor preselector, and custom analog and digital components.

GENERAL ELECTRIC, Utica, NY, 1985 to 1986

Performed trade-off study exploring alternative T/R circuit architectures in a 2-18 GHz active phased array antenna used for airborne RADAR. The T/R circuits were microwave hybrids containing several Gallium Arsinide MMIC's.

ZEGER-ABRAMS, Glenside, PA, 1981 to 1983

Participated in the development, construction, and delivery of interference cancellation hardware to demonstrate the feasibility of HF SIMOP (simultaneous operation) on the P3-C aircraft. The delivered hardware included a high power Adaptive Interference Canceler, an interference insensitive ALC circuit for a 1 KW HF transmitter, and a synchronous discriminator for an automatic antenna coupler.

Contributed to the design and development of a high speed, low distortion, low noise, high power, broadband complex-weight for use in adaptive systems.

Synthesized and mathematically analyzed candidate system designs for adaptive antenna array processors that incorporate time, frequency, or code multiplexing. Compatibility with other ECCM techniques such as spread spectrum modulation was investigated. Wrote technical reports describing important results and promising systems.

DSP AND SOFTWARE ENGINEERING EXPERIENCE

DIGITAL VIDEO ARTS LTD, Dresher, PA, 1995 to 1996

Developed microcode to perform Wavelet based data compression algorithms on NTSC/PAL video using the VCP a high performance SIMD architecture computing element.

CHECKPOINT SYSTEMS, Thorofare, NJ, 1995

Hardware/Software consultant supporting the introduction of a new, cost-reduced version of an electronic security product built with several TMS-320, Neuron, and 80188 microprocessors, various FPGA's and PLD's, and analog/RF circuitry. As part of his work, Nadovich wrote code for each of the embedded processors, including a portable FORTH compiler written in C that was used as a diagnostic scripting facility.

FLAM & RUSSELL, INC, Horsham, PA, 1984 - 1996

Designed a twelve-channel, hybrid analog/digital receiver system for use in super- resolution DF. Each of the twelve, precisely matched receiver channels consisted of custom RF/analog downconversion circuitry followed by real-time digital signal processing implemented in four TMS-320 microprocessors. Designed both the RF and digital hardware and the real-time firmware.

Wrote software implementations of the super-resolution direction finding algorithms Maximum Likelihood and MUSIC for use with the above receiver system. Integrated the DF software into a general antenna array simulator, permitting testing of the algorithm with arrays of arbitrarily located loops and dipoles illuminated by a generalized signal environment.

MECHANICAL DESIGN EXPERIENCE

EDS SUPERDROME, Frisco, TX, 1997 to 1998

Design engineer for another velodrome built using the same innovative techniques applied in Atlanta. In this track, Nadovich improved the concept developed in Atlanta with several key refinements. The 250 meter EDS Superdrome was assembled in only 7 days. It now is being used by the US national team for training and competition.

OLYMPIC VELODROME, Atlanta GA, 1994 to 1996

Co-authored a winning technical proposal for the construction of a 250 meter velodrome for the 1996 Olympics. The track has 42 degree banking in the curves and a proprietary shape designed by Nadovich using a hybrid symbolic/numerical model implemented in Mathematica and AutoCAD and based on the theory of the Fresnel integral. Comprising over 75 tons of structural steel framework, the track was fabricated on a tight schedule at C.H. Landis Company (Souderton, PA) under Nadovich's supervision. It was temporarily installed at the Stone Mountain Cycling and Archery Venue near Atlanta Georgia for use in the 1996 Olympic games.

NETWORK AND SYSTEM ADMINISTRATION EXPERIENCE

JTAN, Sellersville, PA, 1991 to present

Owns and manages an Internet presence provider business JTAN with customers worldwide.

LINEX COMMUNICATION, San Francisco, CA, 1995 to 2000

Administrative consultant for a large an ISP in the San Francisco Bay area. Assists in optimizing daily operation, upgrades, and maintenance of the Web server and email system. Also provided a comprehensive, multi-client, WWW server access statistical analysis package (http://www.jtan.com/stats) written in perl and C that is currently in use by this and other ISPs.

LITTON AMECOM, College Park, MD, 1983 to 1984

Contributed to the proposal of a high capacity, frequency multiplexed, Local Area Network. Participated in an architecture trade-off study that contrasted TDM and FDM technologies.

EDUCATION

RENSSELAER POLYTECHNIC INSTITUTE

Completed Master's Degree (7/81) with specialty in network theory and numerical analysis. Thesis work, an efficient algorithm for the solution of partial differential equations, required extensive programming in APL and FORTRAN, along with detailed mathematical analysis. Another advanced project was the design of a bit-slice processor for high speed numerical convolution. Was Research Assistant; was supported by IBM.