tion and space power needs that cannot now be satisfied by the conventional technologies now in use. The technology has now reached a high level of maturity and represents an available and possible invaluable resource for immediate and future use. ACKNOWLEDGEMENTS The status of the technology and applications of beamed power transmission at 2.45 GHz as described in this paper has resulted in large part from the many studies and technology developments supported by NASA, either directly or through the Jet Propulsion Laboratory, the early support given by the Air Force and the early and continuing support of the Raytheon Company. REFERENCES [1] Fisher, Arthur (1988) Beam-Power Plane, Popular Science, Jan. pp. 62-66. [2] Brown, W.C. (1988) All Electronic Propulsion—Key to Future Space Ship Design, Paper AIAA 88-3170 at AIAA/ASME/SAE/ASEE Joint Propulsion Conference, 11-13 July, Boston, MA. [3] Brown, W.C. (1965) Experimental Airborne Microwave Supported Platform, Tech. Rep. RADC-TR-65-188, Contract AF30 (602) 3481, Dec. [4] Brown, W.C. (1969) Experiments Involving a Microwave Beam to Power and Position a Helicopter, IEEE Trans. Aerospace Electronic Systems, Vol. AES-5, No. 5, Sept., pp. 692-702. [5] Brown, W.C. (1968) Experimental System for Automatically Positioning a Microwave Supported Platform, Tech. Rep. RADC-TR-68-273, Contract AF 30 (602) 4310, Oct. [6] Dickinson, R.M. & Brown, W.C. (1975) Radiated Microwave Power Transmission System Efficiency Measurements, Tech. Memo 33-727, Jet Propulsion Lab., Cal. Inst. Technol., 15 March. [7] Brown, W.C. (1977) Electronic and Mechanical Improvement of the Receiving Terminal of a Free-Space Microwave Power Transmission System, Raytheon Contractor Rept. PT-4964, NASA CR-135194, Aug. [8] NASA (1975) Microwave Power Transmission System Studies, Raytheon Contractor Rep. ER 75-4368, NASA CR-134886, Dec. [9] Dickinson, R.M. (1975) Evaluation of a Microwave High-Power Reception- Conversion Array for Wireless Power Transmission, Tech. Memo 33-741, Jet Propulsion Lab., Cal. Inst. Technol., 1 Sept. [10] NASA (1975) Reception-Conversion Subsystem (RXCV) Transmission System, Raytheon Final Rep. Microwave Power, ER75-4386, JPL Contract 953968 NASA Contract NAS7-100, Sept. [11] Brown, W.C. (1960) Microwave Beamed Power Technology Improvement, Final Rep., JPL Contract 955104, Raytheon Rep. PT-5163, 15 May. [12] Glaser, P.E. (1968) Power From the Sun; Its Future, Science, Vol. 162, pp. 957-961, 22 Nov. [13] DOE/NASA (1980) Final Proc. Solar Power Satellite Program Rev. DOE/NASA Satellite Power System Concept Develop. Evaluation Program, Conf. 800491, July. [14] Brown, W.C. (1981) Satellite Power System (SPS) Magnetron Tube Assessment Study, NASA Contractor Rep. 3383, Contract NAS8-33157, Feb.
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