Mitsubishi Denki Kabushiki Kaisha

Kazuyuki Takada

Izumi Mikami

Yoshihiko Konishi

Izuru Naito

Hiroyuki Satou

High-output transmitters are applied to a power generation satellite and a transmission antenna apparatus and a transmission antenna having an array antenna with a small number of element antennas and a reflecting mirror antenna is applied, thereby providing a power generation satellite and a transmission antenna apparatus in a space photovoltaic generation system comprising transmission antennas each having performance equivalent to that of a phased array antenna with a smaller number of transmitters and a smaller number of element antennas than those of a transmission antenna implemented as a phased array antenna.

Power generation satellite and transmission antenna apparatus

A space photovoltaic power generation system including a plurality of power satellites arranged in space, each of which converts electrical energy, into which sunlight has been photoelectric-converted, into a microwave, and transmits the microwave to an electric power base. The space photovoltaic power generation system divides the plurality of power satellites into a number of power satellite groups and adjusts the amount of phase adjustment to be made to a microwave which each of the plurality of power satellites included in each power satellite group will transmit so that a plurality of microwaves from the plurality of power satellites included in each power satellite group are in phase with one another. The beamwidth of the plurality of microwaves can be reduced without increasing the area of the aperture of a transmission antenna of each of the plurality of power satellites. If the plurality of microwaves transmitted from the plurality of power satellites included in each power satellite group interfere with microwaves transmitted from any other power satellite group, the beamwidth is reduced. To avoid the reduction in the beamwidth, each of the plurality of power satellites included in each power satellite group modulates the phase-adjusted microwave so as to generate an incoherent microwave so that the microwave does not interfere with other microwaves transmitted from any other power satellite group.

Space photovoltaic power generation method and system

A space photovoltaic generation system including a plurality of power satellites arranged in space, each of which converts electrical energy, into which sunlight has been photoelectric-converted, into a microwave, and transmits the microwave to an electric power base. The system can thus transmit a microwave of high power to the electric power base. Each of the plurality of power satellites modulates the generated microwave so as to generate an incoherent microwave before transmitting it to the electric power base, thus reducing the power density of the electric power transmitted to the electric power base on the earth and hence a loss in the total amount of energy transmitted to the electrical power base on the earth.

Space photovoltaic power generation system, power satellite, and electric power base

A method of and a system for receiving microwave beams from a plurality of power satellites ( ) in space by way of a receiving antenna ( ). By controlling the directions of a plurality of microwave beams to be transmitted from the plurality of power satellites, the plurality of power satellites ( ) direct the plurality of microwave beams into an aperture surface of the receiving antenna ( ), respectively, so that the plurality of microwave beams can be dispersively received at a number of different positions on the aperture surface of the receiving antenna ( ), so as to level the energy distribution of the microwaves received on the aperture surface of the receiving antenna ( ).

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Tokyo, Japan

Kazuyuki Takada