Table 2.2 Microwave Power Transmission Subsystem Parameters • Frequency = 2.45 GHz • Wavelength = 12.2 cm • Output Power to Power Grid = 5 GW • Transmit Array Size = I km in diameter, 13.4 x 10^ kg mass • Power Radiated from Transmit Array = 6.85 GW • MPTS Efficiency = 61.1 percent • Phase Control System: An active retrodirective array with a pilot beam reference for providing phase conjugation. This system includes: Phase Lock Loop Around Each Tube for Phase Stability and Noise Suppression Double Sideband, Suppressed Carrier Modulation (Two-Pilot Frequencies) Coding of Pilot Beam for Security and Pilot Discrimination Ground Safety Control System (Ground Sensors for Interpreting Beam Shape) Power Density Levels Center of Transmit Antenna = 22 kW/m^ = 2.2 W/cm^ 7 2 Edge of Transmit Antenna = 2.4 kW/m = 240 mW/cm 2 Center of Rectenna = 23 mW/cm 2 Edge of Rectenna = I mW/cm Rectenna Size = 10.0 km x 12.4 km Beam Diameter = 2.8 x IO-Z| rad Pointing Held to + 2.8 x 10”^ raa
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