Active transmit array with multiple parallel receive/transmit paths per element
An antenna including an array of N-port receive antennas; an array of M-port transmit antennas; and a plurality of cells for coupling the receive antennas to the transmit antennas, each cell having plural amplifiers coupled between the receive antenna and the transmit antenna thereof. The amplifiers may be replaced with injection-locked oscillators. In the best mode, an arrangement is included for distributing signals between the ports of the receive antenna and the amplifiers and between the amplifiers and the transmit antenna. This arrangement may be a manifold such as a network of power combiners and dividers.
1. An antenna comprising:
an array of N-port receive antennas;
an array of M-port transmit antennas; and
a plurality of cells for coupling said receive antennas to said transmit antennas, each cell having plural amplifiers coupled between the receive antenna and the transmit antenna thereof via first and second manifolds, each manifold having a power divider and/or a power combiner.
2. The invention of claim 1 further including means for maintaining said cells in a predetermined relative orientation.
3. The invention of claim 1 wherein said first manifold includes means for distributing signals between said ports of said receive antenna and said amplifiers.
4. The invention of claim 3 wherein said first manifold is a network utilizing power combiners and/or dividers.
5. The invention of claim 4 wherein said network utilizes Wilkinson power combiners and dividers.
6. The invention of claim 5 wherein said second manifold includes means for distributing signals between said amplifiers and said ports of said transmit antenna.
7. The invention of claim 6 wherein said second manifold is a network utilizing power combiners and/or dividers.
8. The invention of claim 7 wherein said network utilizes Wilkinson power combiners and dividers.
9. The invention of claim 1 wherein said receive antenna is a patch antenna.
10. The invention of claim 1 wherein said receive antenna is a multiple port antenna.
11. The invention of claim 10 wherein said receive antenna is an eight-port antenna.
12. The invention of claim 1 wherein said transmit antenna is a patch antenna.
13. The invention of claim 1 wherein said transmit antenna is multiple-port antenna.
14. The invention of claim 13 wherein said transmit antenna is an eight-port antenna.
15. The invention of claim 1 including means for receiving a signal at a first frequency and transmitting a signal at a second frequency.
16. The invention of claim 1 including means for receiving a signal with a first polarization and transmitting a signal with a second polarization.
17. The invention of claim 1 wherein said transmit antenna and said receive antenna of at least one of said cells point in different directions.
18. The invention of claim 1 wherein said transmit antenna and said receive antenna of at least one of said cells are spatially separated.
19. The invention of claim 1 wherein the shape of said transmit antenna differs from the shape of said receive antenna of at least one of said cells.
20. The invention of claim 1 wherein said receive antenna array is conformal to a curved surface.
21. The invention of claim 1 wherein said transmit antenna array is conformal to a curved surface.
22. The invention of claim 1 wherein said receive antenna array is conformal to a first curved surface and said transmit antenna array is conformal to a second curved surface.
23. The invention of claim 1 further including means for steering a beam output by said antenna.
24. The invention of claim 23 wherein said means for steering includes means for receiving energy at a first non-normal angle of incidence.
25. The invention of claim 24 wherein said means for steering includes means for transmitting energy at said non-normal angle of incidence.
26. The invention of claim 24 wherein said means for steering includes means for transmitting energy at a second non-normal angle of incidence.
27. The invention of claim 23 wherein said means for steering includes phase shifters.
28. An antenna comprising:
an array of N-port receive antennas;
an array of M-port transmit antennas; and
a plurality of cells for coupling said receive antennas to said transmit antennas, each cell having plural injection-locked oscillators coupled between the receive antenna and the transmit antenna thereof via first and second manifolds, each manifold having a power divider and/or a power combiner.
29. The invention of claim 28 further including means for maintaining said cells in a predetermined relative orientation.
30. The invention of claim 28 wherein each manifold is a network utilizing Wilkinson power combiners and dividers.
31. The invention of claim 28 wherein said receive antenna is a patch antenna.
32. The invention of claim 28 wherein said receive antenna is a multiple-port antenna.
33. The invention of claim 32 wherein said receive antenna is an eight-port antenna.
34. The invention of claim 28 wherein said transmit antenna is a patch antenna.
35. The invention of claim 28 wherein said transmit antenna is a multiple-port antenna.
36. The invention of claim 35 wherein said transmit antenna is an eight-port antenna.
37. The invention of claim 28 including means for receiving a signal at a first frequency and transmitting a signal at a second frequency.
38. The invention of claim 28 including means for receiving a signal with a first polarization and transmitting a signal with a second polarization.
39. The invention of claim 28 wherein said transmit antenna and said receive antenna of at least one of said cells point in different directions.
40. The invention of claim 28 wherein said transmit antenna and said receive antenna of at least one of said cells are spatially separated.
41. The invention of claim 28 wherein the shape of said transmit antenna differs from the shape of said receive antenna of at least one of said cells.
42. The invention of claim 28 wherein said receive antenna array is conformal to a curved surface.
43. The invention of claim 28 wherein said transmit antenna array is conformal to a curved surface.
44. The invention of claim 28 wherein said receive antenna array is conformal to a first curved surface and said transmit antenna array is conformal to a second curved surface.
45. The invention of claim 28 further including means for steering a beam output by said antenna.
46. The invention of claim 45 wherein said means for steering includes means for receiving energy at a first non-normal angle of incidence.
47. The invention of claim 46 wherein said means for steering includes means for transmitting energy at said non-normal angle of incidence.
48. The invention of claim 46 wherein said means for steering includes means for transmitting energy at a second non-normal angle of incidence.
49. The invention of claim 45 wherein said means for steering includes phase shifters.
50. A method for transmitting a signal comprising the steps of:
illuminating an array of N-port receive antennas with a signal;
transmitting said signal from an array of M-port transmit antennas; and
providing a plurality of cells for coupling said receive antennas to said transmit antennas, each cell having plural amplifiers coupled between the receive antenna and the transmit antenna thereof via a manifold having a power divider and/or a power combiner.