Circulator device with two magnet-free circulators

1. A circulator device, comprising:

two magnet-free circulators, each of which having a forced time variance;

a plurality of ports;

wherein the two circulators are configured to have mutually anti-phase time variance;

wherein each of the two circulators is coupled to all of the ports;

wherein each of the two circulators is modulated by a poly-phase signal with an angular direction of phase progression; and

wherein the two circulators have same angular direction but 180 degrees out of phase.

2. The circulator device of claim 1 , wherein the poly-phase signal is a poly-phase sinusoidal signal.

3. The circulator device of claim 1 , wherein the poly-phase signal is a three-phase signal.

4. The circulator device of claim 1 , wherein the two circulators are configured to receive one and the same signal but with mutually opposite phase.

5. The circulator device of claim 1 , wherein the two circulators are configured to receive one and the same signal and with same phase.

6. The circulator device of claim 1 , wherein the two circulators are configured such that the same input signal inputted to the two circulators results in the same output signal being outputted from the two circulators.

7. The circulator device of claim 1 , wherein electronic components of at least one of the two circulators are arranged in a star topology.

8. The circulator device of claim 1 , wherein electronic components of at least one of the two circulators are arranged in a ring topology.

9. The circulator device of claim 1 , wherein each of the two circulators comprise active electronic components.

10. The circulator device of claim 1 , wherein each of the two circulators comprises variable capacitance diodes.

11. The circulator device of claim 1 , wherein each of the two circulators comprises Micro-Electro-Mechanical System (MEMS) varactors.

12. The circulator device of claim 1 , wherein each of the two circulators comprises switches.

13. The circulator device of claim 12 , wherein the switches are made of complementary-metal-oxide-semiconductor (CMOS) transistors.

14. The circulator device of claim 1 :

wherein the two circulators form a circulator module; and

wherein the circulator device comprises at least two daisy-chained circulator modules.

15. A circulator device, comprising:

two magnet-free circulators, each of which having a forced time variance;

a plurality of ports;

wherein the two circulators are configured to have mutually anti-phase time variance;

wherein each of the two circulators is coupled to all of the ports;

further comprising a plurality of transformer baluns;

wherein each transformer balun is configured to couple one of the ports to both the two circulators;

wherein one of the transformer baluns is configured to split a signal (Sin) received from its port into a first signal and a second signal; and

wherein the first signal and the second signal have same magnitude and mutually separated in phase by 0 or 180 degrees.

16. The circulator device of claim 15 :

wherein each of the two circulators is modulated by a poly-phase signal with an angular direction of phase progression; and

wherein the two circulators have same angular direction but 180 degrees out of phase.

17. The circulator device of claim 15 :

wherein one of the two circulators is configured to propagate the first signal;

wherein the other of the two circulators is configured to propagate the second signal; and

wherein the first signal and the second signal are propagated through the two circulators in same angular direction to preserve that the first signal and the second signal are mutually separated in phase by 0 or 180 degrees.

18. The circulator device of claim 17 , wherein another of the transformer baluns is configured to combine the first signal received from the one of the two circulators with the second signal received from the other of the two circulators into a combined signal and to provide the combined signal to its port.

19. The circulator device of claim 15 , wherein the poly-phase signal is a poly-phase sinusoidal signal.

20. The circulator device of claim 15 , wherein the poly-phase signal is a three-phase signal.

21. The circulator device of claim 15 , wherein the two circulators are configured to receive one and the same signal but with mutually opposite phase.

22. An isolator device, comprising:

a circulator device, the circulator device comprising:

two magnet-free circulators, each of which having a forced time variance;

a plurality of ports;

wherein the two circulators are configured to have mutually anti-phase time variance;

wherein each of the two circulators is coupled to all of the ports;

wherein each of the two circulators is modulated by a poly-phase signal with an angular direction of phase progression;

wherein the two circulators have same angular direction but 180 degrees out of phase

wherein the two circulators form a circulator module; and

wherein one of the ports of the circulator device is grounded via a matched termination impedance.

23. The isolator device of claim 22 , further comprising at least two cascaded circulator modules.

24. A radio transceiver device, comprising:

at least one circulator device, the at least one circulator device comprising:

two magnet-free circulators, each of which having a forced time variance;

a plurality of ports;

wherein the two circulators are configured to have mutually anti-phase time variance;

wherein each of the two circulators is coupled to all of the ports;

wherein each of the two circulators is modulated by a poly-phase signal with an angular direction of phase progression; and

wherein the two circulators have same angular direction but 180 degrees out of phase.