Microwave radiator utilizing solar energy

• US 4,490,668 A
• Filed: 07/12/1979
• Issued: 12/25/1984
• Est. Priority Date: 07/12/1979
• Status: Expired due to Term

• Current Assignee: Lockheed Martin Corporation (Martin Marietta Corporation)
• Original Assignee: RCA Corporation (General Electric Company)
• Inventors: Sterzer, Fred
• Primary Examiner(s): Hickey, R. J.
• Application Number:
  US06/057,109
• Time in Patent Office: 1,993 Days
• Field of Search: 322/2, 290/1, 290/52, 455/25, 244/158, 244/159, 244/179, 343/708, 343/DIG. 2
• US Class Current: 322/2.00R
• CPC Class Codes: H02M 11/00 Power conversion systems not covered by the preceding groups
• CPC Class Codes: H02M 3/155 using semiconductor devices only
• CPC Class Codes: Y10S 136/292 Space - satellite

Abstract

A space-oriented apparatus for converting solar energy to microwave energy. The microwave energy is used to generate an RF beam for propagation to the earth. The apparatus is formed into an extended planar sandwich-like structure carrying solar cells on one surface facing the sun and microwave devices on the other face for generating the RF beam. The microwave devices are energized by the solar cells, and function to generate the RF energy. The apparatus is useful for converting solar energy to microwave power, and to operate communication satellites and satellites having radar functions.

Claims

1. A space-oriented apparatus for converting solar electromagnetic energy to microwave radiation, said apparatus comprising:

source means for generating microwave radio frequency (RF) signals;

a plurality of energy converting modules formed as an array on a support structure, each module comprising;

a plurality of solar cells arranged in a group to form an array to generate direct current power;

microwave signal amplifying means coupled to said source means and being responsive to said RF signals for amplifying said RF signals;

direct coupling means for energizing, with said direct current power from said group of solar cells, said amplifying means; and

antenna means coupled to said microwave signal amplifying means so that each one of said modules includes a separate one of said microwave signal amplifying means for each of said antenna means each antenna means being responsive to said RF amplified signals to radiate a radio frequency (RF) beam into space,

said apparatus being formed on said support structure in a generally extended plane, one face of said structure carrying said solar cells of each of said modules and the other opposite face of said structure carrying said microwave signal amplifying means and said antenna means, said apparatus when in operating position in space having said antennas disposed to face a desired direction and arranged to propagate said RF beam in said desired direction.

2. In the apparatus recited in claim 1 further including means for controlling the phase of said RF signal so that the direction of propagation of said RF beam from said antenna means is directed in a predetermined direction.

3. In the apparatus of claim 1, said microwave signal amplifying means being arranged in a network comprising transmission lines for dividing power equally to each of said microwave signal amplifying means.

4. In the apparatus recited in claim 3 further including phase shifting means for controlling the phase of each of said RF signals to provide a group of said RF beams from said antennas having the same phase.

5. In the apparatus recited in claim 4 wherein said phase shifting means includes a plurality of phase shifters, each one of said plurality of phase shifters being coupled to a respective one of said microwave amplifying means and further includes a phase control logic means for generating a plurality of control signals, each control signal for controlling a respective one of said phase shifters.

6. In the apparatus of claim 5 further including a plurality of said networks, said RF source signal being coupled to each network, and wherein said phase control means provides a control signal to the respective phase shifters to selectively control the phase of each of said networks.