Robert Zavrel W7SX
Call Sign: W7SX
Bob published the first block diagram of an SDR receiver in 1988, invented the 8-circle antenna array, has published over 100 papers and articles in both professional and amateur publications, and has 7 patents. He has achieved DXCC Honor roll (mixed and CW) and 5BWAZ (200). He is currently a volunteer technical advisor to the ARRL, ARRL Life Member, author of Antenna Physics, an Introduction (ARRL) and Senior Member of the IEEE. Bob has an BS in Physics from the university of Oregon.