LOW COST, ACTIVE ANTENNA ARRAYS

• US 20120142280A1
• Filed: 06/30/2011
• Published: 06/07/2012
• Est. Priority Date: 07/01/2010
• Status: Active Grant

• Current Assignee: NEC Advanced Networks Incorporated (NEC Corporation)
• Original Assignee: Blue Danube Labs, Inc (NEC Corporation)
• Inventors: BANU, Mihai, FENG, Yiping, PRODANOV, Vladimir I.
• Granted Patent: US 8,611,959 B2
• Time in Patent Office: Days
• US Class Current: 455/69
• CPC Class Codes: H01Q 3/26 varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture H01Q3/12, H01Q3/22, H01Q3/24 take precedence
• CPC Class Codes: H04B 7/0682 using phase diversity (e.g. phase sweeping)

Abstract

A transmitter system including: a bidirectional signaling (BDS) network having first and second networks for carrying first and second carrier signals, and having a set of n phase synchronous location pairs (a_i, b_i),; and also including tunable transmitter circuits for driving an antenna array, each tunable transmitter circuit having an output line for carrying an output signal and first and second input lines electrically connected to the first and second networks of the BDS network at locations of a corresponding one of the set of phase synchronous location pairs, and including a multiplier having a first input electrically connected to the first input line of that tunable transmitter circuit; a phase setting circuit electrically connected to the multiplier for controlling the phase of the output signal of that tunable transmitter circuit; and an amplitude setting circuit for controlling the amplitude of the output signal of that tunable transmitter circuit.

Claims

1. A transmitter system for an array of antenna elements, said transmitter system comprising:

a bidirectional signaling (BDS) network including a first network for carrying a first carrier signal and a second network for carrying a second carrier signal, and having a set of n phase synchronous location pairs (a_i, b_i), each corresponding to a location a_i on the first network and a location b_i on the second network; and

a plurality of tunable transmitter circuits, each for driving a corresponding different antenna element of the array of antenna elements, wherein each tunable transmitter circuit of the plurality of tunable transmitter circuits has an output line for carrying an output signal and first and second input lines electrically connected to the first and second networks of the BDS network at locations of a corresponding one of the set of phase synchronous location pairs, and comprises;

a multiplier having a first input electrically connected to the first input line of that tunable transmitter circuit;

a phase setting circuit having a control input for receiving a phase control signal, said phase setting circuit electrically connected to said multiplier for controlling the phase of the output signal of that tunable transmitter circuit; and

an amplitude setting circuit after the multiplier and having a control input for receiving an amplitude control signal, said amplitude setting circuit for controlling the amplitude of the output signal of that tunable transmitter circuit.

2. The transmitter system of claim 1, wherein within each tunable transmitter circuit, the phase setting circuit is electrically connected to the multiplier within that tunable transmitter circuit to implement a configuration selected from the group consisting of a first configuration and a second configuration, the first configuration having said phase setting circuit between the first input line of the tunable transmitter circuit and the first input of said multiplier, and the second configuration having said phase setting circuit between the output of said multiplier and the output line of said tunable transmitter circuit.

3. The transmitter system of claim 1, wherein each tunable transmitter circuit of the plurality of tunable transmit circuits further comprises a power amplifier having an input electrically connected to the amplitude setting circuit within that tunable transmitter circuit and for providing a drive signal to the corresponding antenna element of the array of antenna elements.

4. The transmitter system of claim 1 for processing an IF transmit signal and wherein each tunable transmitter circuit of the plurality of tunable transmit circuits further comprises an up-conversion mixer having a first input for receiving a signal derived from the IF transmit signal, a second input for receiving a signal from the output of the multiplier in that tunable transmitter circuit, and an output for providing a signal to the output line of that tunable transmitter circuit.

5. The transmitter system of claim 4, wherein within each tunable transmitter circuit of the plurality of transmitter circuits the multiplier within that tunable transmitter circuit has a second input electrically connected to the second input of that tunable transmit circuit.

6. The transmitter system of claim 1, further comprising an up-conversion mixer for mixing the first carrier signal and an IF transmit signal to generate the second carrier signal on the second network of the BDS network.

7. The transmitter system of claim 6, wherein within each tunable transmitter circuit of the plurality of transmitter circuits the multiplier within that tunable transmitter circuit has a second input electrically connected to the second input of that tunable transmit circuit.

8. The transmitter system of claim 1 for processing an IF transmit signal and wherein each tunable transmitter circuit of the plurality of tunable transmitter circuits further comprises an up-conversion mixer with a first input electrically coupled to the output of the multiplier in that tunable transmit circuit, a second input for receiving the IF transmit signal, and an output electrically coupled to the amplitude setting circuit in that tunable transmit circuit.

9. The transmitter system of claim 1 for processing an IF transmit signal and wherein each tunable transmit circuit of the plurality of tunable transmit circuits (1) further comprises a second multiplier having an output, a first input, and a second input electrically connected to the second input line of that tunable transmit circuit, (2) wherein the first mentioned multiplier in that tunable transmit circuit has an output and a second input for receiving the IF transmit signal, and (3) wherein the first input of the second multiplier is electrically connected to the output of the first mentioned multiplier in that tunable transmit circuit.

15. The receiver system of claim 1, wherein within each tunable receiver circuit of the plurality of tunable receiver circuits the input of the amplitude setting circuit in that tunable receiver circuit is electrically connected to the output of the mixer in that tunable receiver circuit.

16. The receiver system of claim 15, further comprising a receive signal line and wherein within each tunable receiver circuit of the plurality of tunable receiver circuits the output of the amplitude setting circuit in that tunable receiver circuit is electrically connected to the receive signal line.

18. The receiver system of claim 1, wherein within each tunable receiver circuit of the plurality of tunable receiver circuits the second input of the mixer for that tunable receiver circuit is electrically connected to the second input line of that tunable receiver circuit.

19. The receiver system of claim 18, wherein within each tunable receiver circuit of the plurality of tunable receiver circuits the second input of the multiplier in that tunable receiver circuit is electrically connected to the output of the mixer in that that tunable receiver circuit.

20. The receiver system of claim 19, wherein within each tunable receiver circuit of the plurality of tunable receiver circuits the output of the multiplier for that tunable receiver circuit is electrically coupled to the input of the amplitude setting circuit for that tunable receiver circuit.

21. The receiver system of claim 20, wherein within each tunable receiver circuit of the plurality of tunable receiver circuits the output of the amplitude setting circuit for that tunable receiver circuit is electrically connected to one of the first and second networks of the BDS network.

10. A receiver system for an array of antenna elements, said receiver system comprising:

a bidirectional signaling (BDS) network including a first network for carrying a first carrier signal and a second network for carrying a second carrier signal, and having a set of n phase synchronous location pairs (a_i, b_i), each corresponding to a location a_i on the first network and a location b_i on the second network; and

a plurality of tunable receiver circuits, each for receiving input from a corresponding antenna element of the array of antenna elements, wherein each tunable receiver circuit of the plurality of tunable receiver circuits has an output line and first and second input lines electrically connected to the first and second networks of the BDS network at locations of a corresponding one of the phase synchronous location pairs, and comprises;

a multiplier having a first input electrically connected to the first input line of that tunable receiver circuit and having an output;

a phase setting circuit having a control input for receiving a phase control signal for controlling phase of a signal passing through the phase setting circuit, said phase setting circuit electrically connected to said multiplier;

a mixer having a first input for receiving a signal from the corresponding antenna element of the array of antenna elements, a second input for receiving a local carrier signal obtained from the BDS network, and an output; and

an amplitude setting circuit having an input, an output, and a control input for receiving an amplitude control signal for controlling amplitude of a signal passing through the amplitude setting circuit, said amplitude setting circuit connected to one of the mixer for that tunable receiver circuit and the multiplier for that tunable receiver circuit.

11. The receiver system of claim 10, wherein within each tunable receiver circuit of the plurality of tunable receiver circuits, the phase setting circuit is electrically connected to the multiplier within that tunable receiver circuit to implement a configuration selected from the group consisting of a first configuration and a second configuration, the first configuration having said phase setting circuit between the first input line of the tunable receiver circuit and the first input of said multiplier, and the second configuration having said phase setting circuit electrically connected to the output of said multiplier.

12. The receiver system of claim 10, wherein each tunable receiver circuit of the plurality of tunable receiver circuits further comprises a low noise amplifier having an input for receiving a signal from the corresponding antenna element of the plurality of antenna elements and an output electrically connected to the first input of the mixer in that tunable receiver circuit.

13. The receiver system of claim 10, wherein within each tunable receiver circuit of the plurality of receiver circuits the multiplier within that tunable receiver circuit has a second input electrically connected to the second input of that tunable receiver circuit.

14. The receiver system of claim 10, wherein within each tunable receiver circuit of the plurality of tunable receiver circuits, the second input of the mixer for that tunable receiver circuit is electrically connected to the output of the multiplier for that tunable receiver circuit.

17. The receiver system of claim 10, wherein within each tunable receiver circuit of the plurality of tunable receiver circuits the output of the amplitude setting circuit for that tunable receiver circuit is electrically connected to one of the first and second networks of the BDS network.

22. A transceiver system for an array of antenna elements, said transceiver system comprising:

a bidirectional signaling (BDS) network including a first network for carrying a first carrier signal and a second network for carrying a second carrier signal, and having a set of n phase synchronous location pairs (a_i, b_i), each corresponding to a location a_i on the first network and a location b_i on the second network;

an up-conversion mixer for mixing the first carrier signal and an IF transmit signal to generate the second carrier signal on the second network of the BDS network; and

a plurality of transceiver circuits, each for connecting to a corresponding different antenna element of the array of antenna elements and each transceiver circuit comprising;

(1) a transmitter circuit for driving the corresponding antenna element of the array of antenna elements, said transceiver circuit having an output line for carrying an output signal and first and second input lines electrically connected to the first and second networks of the BDS network at locations of a corresponding one of the set of phase synchronous location pairs, and comprising a multiplier having a first input electrically connected to the first input line of that transmitter circuit; and

(2) a receiver circuit for receiving input from the corresponding antenna element of the array of antenna elements, said receiver circuit having an output line and first and second input lines electrically connected to the first and second networks of the BDS network at locations of a corresponding one of the phase synchronous location pairs, and comprising;

(a) a multiplier having a first input electrically connected to the first input line of that receiver circuit and having an output; and

(b) a mixer having a first input for receiving a signal from the corresponding antenna element of the array of antenna elements, a second input for receiving a local carrier signal obtained from the BDS network, and an output.

23. The transceiver system of claim 22, wherein within each transceiver circuit of the plurality of transceiver circuits, the output line of the receiver circuit in that transceiver circuit is electrically connected to one of the first and second networks of the BDS network.

24. The transceiver system of claim 22, wherein within each transceiver circuit of the plurality of transceiver circuits, the transmitter circuit further comprises:

a phase setting circuit having a control input for receiving a phase control signal, said phase setting circuit electrically connected to the multiplier in that transmitter circuit for controlling the phase of the output signal of that transmitter circuit; and

an amplitude setting circuit after the multiplier in that transmitter circuit and having a control input for receiving an amplitude control signal, said amplitude setting circuit for controlling the amplitude of the output signal of that transmitter circuit.

25. The transceiver system of claim 22, wherein within each transceiver circuit of the plurality of transceiver circuits, the receiver circuit further comprises:

a phase setting circuit having a control input for receiving a phase control signal, said phase setting circuit electrically connected to the multiplier in that receiver circuit for controlling phase of the output signal of the receiver circuit;

an amplitude setting circuit electrically connected to the output of the mixer in that receiver circuit and having a control input for receiving an amplitude control signal.

26. The transceiver system of claim 25, wherein within each transceiver circuit of the plurality of transceiver circuits the output of the amplitude setting circuit within the receiver circuit for that transceiver circuit is electrically connected to one of the first and second networks of the BDS network.

27. A transceiver system for an array of antenna elements, said transceiver system comprising:

a bidirectional signaling (BDS) network including a first network for carrying a first carrier signal and a second network for carrying a second carrier signal, and having a set of n phase synchronous location pairs (a_i, b_i), each corresponding to a location a_i on the first network and a location b_i on the second network; and

a plurality of transceiver circuits, each for connecting to a corresponding different antenna element of the array of antenna elements and each transceiver circuit comprising;

(1) a transmitter circuit for driving the corresponding antenna element of the array of antenna elements, said transceiver circuit having an output line for carrying an output signal and first and second input lines electrically connected to the first and second networks of the BDS network at locations of a corresponding one of the set of phase synchronous location pairs, and comprising a multiplier having a first input electrically connected to the first input line of that transmitter circuit; and

(2) a receiver circuit for receiving input from the corresponding antenna element of the array of antenna elements, said receiver circuit having an output line electrically connected to one of the first and second networks of the BDS network and first and second input lines electrically connected to the first and second networks of the BDS network at locations of a corresponding one of the phase synchronous location pairs, and comprising;

(a) a multiplier having a first input electrically connected to the first input line of that receiver circuit and having an output; and

(b) a mixer having a first input for receiving a signal from the corresponding antenna element of the array of antenna elements, a second input for receiving a local carrier signal obtained from the BDS network, and an output.