2 - MICROWAVE TECHNOLOGY REQUIREMENTS (Ref: NAS 3-17835) • DC-RF Converters and Filters: Provide substantial data related to technical feasibility, efficiency, safety and radio frequency interference « Materials: Demonstrate cost-effective use of non- metallics forproviding distortion-free waveguides and minimizing impact on open cathode performance • Phase Control Subsystem: Demonstrate phase control steady state accuracy subject to error contributions of DC-RF converters and high power radio frequency envi ronment • Waveguide: Demonstrate capability of mass producing light weight, distortion-free waveguides that can efficiently operate in a harsh thermal environment « Biological: Demonstrate safety at microwave frequency and power densities being considered for SSPS use « Antenna Attitude Control & Power Transfer: Demonstrate the accuracy and life potential of the antenna rotary joint systems -- evaluate options in a systems study e Ionosphere: Measure effects of microwave radiation on ionosphere & determine social impact * Switch Gear: Develop & demonstrate switch gear including protective elements for spaceborne applications o Radio Frequency: Investigate radio frequency interference & allocate band to SSPS that would have minimum impact on other units, particularly radio astronomy • Reliability: Investigate reliability considerations in light of the requirements for millions of Amplitrons billions of diodes as well as other equipment which must operate with essentially unlimited life or else be provided for with.appropriate redundancy and maintenance. • Other Microwave Technology Requirements: The remainding technology requirements that have been identified are indicated elsewhere in NASA CR-134886, Section 11,
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