Douglas Hawk
Tagline
Design of RF/Wireless/Analog/Digital/Video Electronics
Contact
-
Phone+17147453163 (Work)
Technical Expertise
Special Skills
Technical Specialties
RF, Wireless, Analog, Digital, Video Systems: Analysis and Design from DC to 20Ghz. Systems Design: Generate System and Subsystem Block Diagrams and Specifications from customer requirements, provide analysis of System Spectrum, Gain, Dynamic Range, Timing, etc. RF Receivers, Downconverters, Demodulators, Modulators, Upconverters, Transmitters. Complete Wireless RF systems analysis: Gain, NF, SNR, SFDR, P1dB, Intermod Products, IP3, CSO, CTB, BER, Range, Fading. Wireless, Spread Spectrum, and Digital Comms Systems: QAM, BPSK, QPSK, FSK, Chirp, DSSS, 802.11, Zigbee, Ethernet, USB, T1. Phase/Amplitude and Vector I/Q modulation/demodulation of all types. PLL and High Speed DDS Synthesizers/Multipliers from Mhz to Ghz. Highly stable XO/VCXO, 1-160Mhz, overtone or fundamental, LVPECL output. Passive filter design: LPF, HPF, BPF, Notch Filter, Diplexer: Chebyschev, Butterworth, Bessel, Elliptic, Cauer; Lumped Element or Coplanar Waveguide/Microstrip/Stripline designs. EMI reduction: Calculation of radiated fields, reduced EMI via appropriate PC Board and Shield designs. TEMPEST compliance design: High isolation, low detectabilty design. Analog Designs: Op-Amp/Transistor Low Noise, High Frequency, High Power: Fixed/Variable Gain Amplifiers, Active/Passive Filters, Rectifiers, Multipliers, ADC/DAC, Instrumentation Amps, H-Bridge Motor Drivers, LiIon/NiMH/NiCd Battery Charging/Management, DC-DC Converters (Buck, Boost, SEPIC). High Speed CPLD/FPGA design for general logic and Communications/DSP applications: High speed Digital FIR Filter, Wide Range DDS designs including I/Q phase/delay adjustable outputs, synchronous logic. Microcontroller/Memory design. Ethernet, USB, T1 link design. Video Modulators/Demodulators, Encoders/Decoders, NTSC/S-Video, HDTV systems. Guidance for RF/Analog Low noise, High Frequency/Power PCB layout.
Additional Specialties
RF/Wireless System/Mathematical analysis using AWR Microwave Office, Ansoft Designer/HFSS, PSpice, Mathcad, Matlab: Comms Link analysis, Antenna Radiation patterns, Spectrum analysis, PLL switching/stability, Analog and AGC loop characteristics, Filter/Diplexer Design and simulation, Coplanar Waveguide/Microstrip/Stripline element design. Other CAD programs for design and simulation: APLAC, Sonnet, SYSCALC, EWSpice, Circuitmaker, ELEKTA. Schematic Capture on ORCAD including Net and Parts Lists, EDIF outputs. CPLD and FPGA design using Quartus II (Altera), Quickworks (Quicklogic), and ISE (Xilinx). PC Board Layout available using PADs, Allegro.
Interests
Experience
Chairman of the Board/President/CEO
Frequency Science, Inc.
Education
University of Michigan-Ann Arbor
Bachelor of Science
Engineering
, 1983