(7) Power converters - 50 kw klystrons (8) Phase control - An active, retrodirective array with a phasing system using transmission lines combined with a subarray-to- subarray phase transfer scheme. (9) Antenna radiators - slotted waveguides (10) DC power distribution system - lateral configuration; 40 KV (11) Antenna mechanical alignment requirements - + 3 arc minutes for a 2% loss in effective antenna gain (12) Rectenna dimensions - 10 km X 13 km (for a 36° latitude) (13) Rectenna collection efficiency - 88% using the specified error budget (14) Ground facility dimensions - 17 km by 23 km (for the .05 mw/cm2 power density limit taken as the example) (15) Power density at center of rectenna - 22 mw/cm^ (16) Power density at edge of rectenna - .9 mw/cm^ (17) Power density at edge of ground facility - .05 mw/cm2 (18) Rectenna cost - $1.29 X 10$ (19) Transmit array cost - $2,146 X 10$ (20) Transmit array weight - 7.38 X 10$ kg (21) Total microwave system efficiency (nominal) 63% (from DC output at rotary joint in transmit array to collected DC output of rectenna).
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