Waveguide switch for routing M-inputs to M of N-outputs

• US 6,380,822 B1
• Filed: 02/08/2000
• Issued: 04/30/2002
• Est. Priority Date: 02/08/2000
• Status: Expired due to Term

• Current Assignee: Hughes Electronics Corporation (Rtx Corporation)
• Original Assignee: Hughes Electronics Corporation (Rtx Corporation)
• Inventors: Lindgren, Gary M.
• Primary Examiner(s): Pascal, Robert
• Assistant Examiner(s): TAKAOKA, DEAN O
• Application Number:
  US09/500,758
• Time in Patent Office: 812 Days
• Field of Search: 333/106, 333/128, 333/256, 333/259, 333/261
• US Class Current: 333/106
• CPC Class Codes: H01P 1/122 Waveguide switches

Abstract

A satellite signal routing system includes a satellite using one or more waveguide switches for routing M-inputs to M of N-outputs. A waveguide switch includes a first waveguide, used as a stationary input coupled to a rotary joint. A joint rotation device, such as a motor, rotates the rotary joint. A rotary waveguide is attached to the rotary joint and also rotates. Two or more second waveguides, used as stationary outputs, are coupled to the rotary waveguide through a non-contacting waveguide. A controller controls the joint rotation device to rotate the rotary joint to align the rotary waveguide with one of the second waveguides.

Claims

1. A waveguide switch comprising:

a first transmission line having a first end and a second end;

a rotary joint having a first side and a second side, said first side rotationally coupled to said second end of said first transmission line;

a joint rotation device coupled to said rotary joint, whereby said joint rotation device rotates said rotary joint;

a rotary transmission line having a first rotary end and a second rotary end, said first rotary end rigidly coupled to said second side of said rotary joint, whereby said rotary transmission line rotates with said rotary joint;

at least two second transmission lines, each of said second transmission lines having a third end and a forth output end, said third end of one of said second transmission lines coupled to said second rotary end of said rotary transmission line through a non-contacting waveguide, said non-contacting waveguide including a waveguide gap, whereby said second rotary end of said rotary transmission line may rotate between said third ends of each of said second transmission lines; and

a controller coupled to said joint rotation device, said controller having control logic operative to control said joint rotation device to rotate said rotary joint to align said rotary transmission line with one of said second transmission lines.

2. The waveguide switch as recited in claim 1, wherein said transmission lines are waveguides.

3. The waveguide switch as recited in claim 1, wherein said transmission lines are coaxial lines.

4. The waveguide switch as recited in claim 1, wherein said transmission lines are planar transmission lines.

5. The waveguide switch as recited in claim 1, wherein said non-contacting waveguide includes a choke joint flange to minimize radiation loss from said waveguide gap.

6. The waveguide switch as recited in claim 1, wherein said non-contacting waveguide includes a choke joint flange to minimize radiation loss from said waveguide gap.

7. The waveguide switch as recited in claim 1, wherein said joint rotation device comprises a motor.

8. The waveguide switch as recited in claim 7, wherein said joint rotation device further comprises an angle measuring device coupled to said motor and said controller, said angle measuring device detecting an angle of said rotary joint.

9. The waveguide switch as recited in claim 8, wherein said angle measuring device comprises an optical encoder.

10. The waveguide switch as recited in claim 1, wherein said first transmission line acts as an input and said two second transmission lines act as outputs.

11. A waveguide switching system, comprising a plurality of waveguide switches formed according to claim 9, whereby M-inputs may be routed to M of N-outputs.

12. The waveguide switch as recited in claim 1, wherein said first transmission line acts as an output and said two second transmission lines act as inputs.

13. A waveguide switching system, comprising a plurality of waveguide switches formed according to claim 12, whereby N-inputs may be routed to N of M-outputs.

14. The waveguide switch as recited in claim 1, wherein said joint rotation device comprises a motor.

15. The waveguide switch as recited in claim 14, wherein said joint rotation device further comprises an optical encoder coupled to said motor and said controller, said optical encoder detecting an angle of said rotary joint.

16. The waveguide switch as recited in claim 1, wherein said first waveguide acts as an input and said two second waveguides act as outputs.

17. A waveguide switching system, comprising a plurality of waveguide switches formed according to claim 16, whereby M-inputs may be routed to M of N-outputs.

18. The waveguide switch as recited in claim 1, wherein said first waveguide acts as an output and said two second waveguides act as inputs.

19. A waveguide switching system, comprising a plurality of waveguide switches formed according to claim 18, whereby N-inputs may be routed to N of M-outputs.

20. A satellite signal routing system, comprising:

a ground station;

a satellite in orbit and in communication with said ground station, said satellite having a waveguide switch comprising;

a first waveguide having a first end and a second end;

a rotary joint having a first side and a second side, said first side rotationally coupled to said second end of said first waveguide;

a joint rotation device coupled to said rotary joint, whereby said joint rotation device rotates said rotary joint;

a rotary waveguide having a first rotary end and a second rotary end, said first rotary end rigidly coupled to said second side of said rotary joint, whereby said rotary waveguide rotates with said rotary joint;

at least two second waveguides, each second of said waveguides having a third end and a forth output end, said third end of one of said second waveguides coupled to said second rotary end of said rotary waveguide through a non-contacting waveguide, said non-contacting waveguide including a waveguide gap, whereby said second rotary end of said rotary waveguide may rotate between said third ends of each of said second waveguides; and

a controller coupled to said joint rotation device, said controller having control logic operative to control said joint rotation device to rotate said rotary joint to align said rotary waveguide with one of said second waveguides.