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On the base of a green-eco technology, S-bandhigh power GaN amplifiers have been developed with a microwave power transmission function in the space electronics equipment. High DC-to-RF conversion efficiency of 63 % was achieved in the 20W GaN amplifier operating at 2.25 GHz and its design technique was extended to realize 1 kW SSPA for the space communication. Furthermore, wireless sensor operation and battery charging was also demonstrated by means of microwave power transmission.

COMPACT GAN HIGH POWER AMPLIFIERS FOR SPACE COMMUNICATION, SENSING AND GREEN POWER TRANSMISSION