Example: air traffic controller
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BASIC PROPAGATION AND ANTENNAS - W3JJJ -- History
w3jjj.comAM 5 – 303 – Antenna Theory and Propagation 1-2 Ver. 1.0 1 INTRODUCTION An antenna is a device for radiating or intercepting electromagnetic wave energy. Virtually every transmitter and every receiver must have an antenna, and all antennas operate in accordance with