Laminar phased array with polarization-isolated transmit/receive interfaces
A phased array includes a laminar substrate having both 1) a plurality of elements forming a patch phased array, and 2) a plurality of integrated circuits. Each integrated circuit is configured to control receipt and transmission of signals by the plurality of elements in the patch phased array. The integrated circuits also are configured to operate the phased array at one or more satellite frequencies—to transmit signals to and/or receive signals from a satellite. Each integrated circuit physically couples with one corresponding element so that incoming signals are received by the corresponding element in a first polarization, and outgoing signals are transmitted by the corresponding element in a second polarization. The phased array isolates the transmit signals from the receive signals by orienting the first and second polarizations differently.
1. A beamforming integrated circuit for controlling receipt and transmission of signals by a plurality of elements in a phased array, the beamforming integrated circuit comprising:
a plurality of vector modulators, each vector modulator configured to control receipt and transmission of signals for a corresponding element of the plurality of elements and comprising:
a receive circuit configured to set phase and gain parameters of incoming signals from the corresponding element;
a transmit circuit configured to set phase and gain parameters for outgoing signals to the corresponding element; and
separate receive and transmit element interfaces for respectively coupling the receive circuit and the transmit circuit to different polarization interfaces of the corresponding element so that incoming signals of a first polarization received by the corresponding element are provided to the receive circuit via the receive element interface and outgoing signals of a second polarization are provided by the transmit circuit to the corresponding element via the transmit element interface, the first and second polarizations being different so that the incoming signals and the outgoing signals are polarization-isolated from one another,
the integrated circuit being configured to use time-division duplex waveforms to receive the incoming signals in designated receive time slots and transmit the outgoing signals in designated transmit time slots to further isolate the incoming signals and the outgoing signals.
2. A beamforming integrated circuit according to claim 1 , wherein the different polarizations are orthogonal to one another.
3. A beamforming integrated circuit according to claim 1 , wherein integrated circuit is configured to operate using 5G protocols.
4. A beamforming integrated circuit according to claim 1 , wherein the integrated circuit is configured to operate at one or more satellite frequencies.
5. A beamforming integrated circuit according to claim 1 , wherein the beamforming integrated circuit is configured to switch each vector modulator between a transmit mode and a receive mode without the use of a switch in the vector modulator.
6. A beamforming integrated circuit according to claim 1 , wherein each vector modulator is configurable between:
a first mode in which the incoming signals are received in a horizontal polarization and the outgoing signals are transmitted in a vertical polarization; or
a second mode in which the incoming signals are received in the vertical polarization and the outgoing signals are transmitted in the horizontal polarization.
7. A beamforming integrated circuit according to claim 1 , further comprising:
common RF circuitry comprising a transmit signal path configured to provide common transmit signals to the vector modulators and a receive signal path configured to receive combined receive signals from the vector modulators.
8. A beamforming integrated circuit according to claim 7 , further comprising:
at least one signal divider through which the common transmit signals from the common RF circuitry are provided to the vector modulators; and
at least one signal combiner through which output signals from the vector modulators are provided as the combined receive signals to the common RF circuitry.
9. A beamforming integrated circuit according to claim 8 , wherein each signal divider is a Wilkinson signal divider and each signal combiner is a Wilkinson signal combiner.
10. A method for controlling receipt and transmission of signals by a plurality of elements in a phased array using a beamforming integrated circuit according to claim 1 , the method comprising:
in a receive mode, receiving by at least one receive circuit, via the corresponding receive element interface, incoming signals of a first polarization from the corresponding element in designated receive time slots; and
in a transmit mode, transmitting by at least one transmit circuit, via the corresponding transmit element interface, outgoing signals of a second polarization to the corresponding element in designated transmit time slots, the first and second polarizations being different so that the incoming signals and the outgoing signals are polarization-isolated from one another.
11. A beamforming integrated circuit for controlling receipt and transmission of signals by a plurality of elements in a phased array, the beamforming integrated circuit comprising:
a plurality of vector modulators, each vector modulator configured to control receipt and transmission of signals for a corresponding element of the plurality of elements and comprising:
a receive circuit configured to set phase and gain parameters of incoming signals from the corresponding element;
a transmit circuit configured to set phase and gain parameters for outgoing signals to the corresponding element; and
separate receive and transmit element interfaces for respectively coupling the receive circuit and the transmit circuit to different polarization interfaces of the corresponding element so that incoming signals of a first polarization received by the corresponding element are provided to the receive circuit via the receive element interface and outgoing signals of a second polarization are provided by the transmit circuit to the corresponding element via the transmit element interface, the first and second polarizations being different so that the incoming signals and the outgoing signals are polarization-isolated from one another without the beamforming integrated circuit including a physical switch used to selectively couple the receive and transmit circuits to the corresponding element and decouple the receive and transmit circuits from the corresponding element.
12. A beamforming integrated circuit according to claim 11 , wherein the different polarizations are orthogonal to one another.
13. A beamforming integrated circuit according to claim 11 , wherein integrated circuit is configured to operate using 5G protocols.
14. A beamforming integrated circuit according to claim 11 , wherein the integrated circuit is configured to operate at one or more satellite frequencies.
15. A beamforming integrated circuit according to claim 11 , wherein each vector modulator is configurable between:
a first mode in which the incoming signals are received in a horizontal polarization and the outgoing signals are transmitted in a vertical polarization; or
a second mode in which the incoming signals are received in the vertical polarization and the outgoing signals are transmitted in the horizontal polarization.
16. A beamforming integrated circuit according to claim 11 , wherein the integrated circuit is configured to use time-division duplex waveforms to receive the incoming signals in a first polarization and transmit the outgoing signals in a second polarization different than the first polarization.
17. A beamforming integrated circuit according to claim 16 , wherein the integrated circuit is configured to receive the incoming signals in designated receive time slots and to transmit the outgoing signals in designated transmit time slots.
18. A beamforming integrated circuit according to claim 11 , wherein the integrated circuit is configured to frequency-division duplex waveforms to receive the incoming signals in a first polarization and transmit the outgoing signals in a second polarization different than the first polarization.
19. A beamforming integrated circuit according to claim 11 , further comprising:
common RF circuitry comprising a transmit signal path configured to provide common transmit signals to the vector modulators and a receive signal path configured to receive combined receive signals from the vector modulators.
20. A beamforming integrated circuit according to claim 19 , further comprising:
at least one signal divider through which the common transmit signal from the common RF circuitry is provided to the vector modulators; and
at least one signal combiner through which output signals from the vector modulators are provided as the combined receive signals to the common RF circuitry.
21. A beamforming integrated circuit according to claim 20 , wherein each signal divider is a Wilkinson signal divider and each signal combiner is a Wilkinson signal combiner.
22. A method for controlling receipt and transmission of signals by a plurality of elements in a phased array using a beamforming integrated circuit according to claim 11 , the method comprising: in a receive mode, receiving by at least one receive circuit, via the corresponding receive element interface, incoming signals of a first polarization from the corresponding element; and in a transmit mode, transmitting by at least one transmit circuit, via the corresponding transmit element interface, outgoing signals of a second polarization to the corresponding element, the first and second polarizations being different so that the incoming signals and the outgoing signals are polarization-isolated from one another without the receive and transmit circuits being selectively coupled to the corresponding element and decoupled from the corresponding element.