ANTENNA BEAMWIDTH AS A FUNCTION OF ANTENNA SIZE (BASED ON HALF-POWER BEAMWIDTH OF PARABOLIC ANTENNAS) 1 100 200 300 500 800 Mc/s 5 Gc/s FREQUENCY FIGURE 3 FREQUENCY DEPENDENCE OF AVAILABLE SIGNAL POWER AS MINIMUM BEAMWIDTH VARIES FOR AN EARTH ANTENNA OF LIMITED PHYSICAL SIZE (One Watt T Free Space 1000 KM Distance - Isotropic Space Antenna) |