David J. Pinion, PE

email: pinion (at) hatdaw (dot) com

Active Registration:
Professional Electrical Engineer, WA, OR, CA, HI

Education: BS Electrical Engineering, University of Maryland
Masters in Engineering, Johns Hopkins University

IEEE Communications Society

Mr. Pinion is a partner and senior engineer of Hatfield & Dawson. He has over 24 years of extensive experience in all aspects of telecommunications engineering, radio frequency (RF) engineering, and electromagnetics. Projects he has overseen or participated in include design, government agency application and approval, specifications, construction supervision, testing, measurements and operation review of communications and radio systems projects for broadcast, closed circuit video and data, industrial and government land mobile and microwave systems, LF navigation and communications, VHF and UHF video, voice and data systems, and industrial uses. He has worked on over 100 projects worldwide for private broadcasting companies, telecommunications common carriers, industrial communications users, educational institutions, cities, counties, states, cable television systems, and the United States and foreign governments.

Mr. Pinion specializes in antenna design, electromagnetic modeling, and RF propagation analysis. He is recognized as a pioneer in the development of the most widely used PC-based electromagnetics modeling software, NEC2. In 1989 he successfully ported a bug-free version of NEC2 from mainframe to PC environment. Since then he has developed many more PC-based programs for commercial and in-house use. Those programs are used in the design and testing of critical land-mobile systems for public safety, medical emergency, and airport applications, as well as intersystem electromagnetic compatibility at multiple use communications sites.

Representative Projects

  • Analysis and preparation of reports concerning the operation and performance of telecommunications facilities and industrial radio frequency devices.
  • Measurement and field inspection of facilities for propagation and verification of computer and manual prediction methods.
  • Field inspection of radio communications facilities for compatibility between radio transmission systems.
  • Analysis, development of amelioration, and field testing relative to radio frequency interference.
  • Inspection of radio transmission facilities, recommendation of capital budgets, and evaluation of quality and performance of radio and television systems.
  • Development of software for propagation prediction, antenna calculation, non-ionizing radiation prediction, and use of digitized terrain and land cover characteristics.
  • Preparation of facility applications for FCC approval, and for land-use approval by local government agencies.