Techniques for filtering multi-component signals
Techniques are described herein for filtering and/or otherwise isolating or extracting components of multi-component signals. More specifically, embodiments of the present disclosure describe techniques for filtering and/or otherwise extracting a continuous wave component (or wireless power component) and a modulated data component from a multi-component signal. In some embodiments, the techniques describe systems, apparatuses and methods for filtering and/or otherwise isolating or extracting a frequency (e.g., modulated data component) from a continuous wave (e.g., wireless power component) without affecting the levels of other frequencies. The individual components or signals can be transmitted by one or more sources and received at one or more existing antennas of an electronic device simultaneously.
1. A system for separating components of a multi-component signal, the system comprising:
signal splitting means for replicating a multi-component signal on a first signal processing path and a second signal processing path;
signal filtering means for removing a modulated data component from the multi-component signal on the second signal processing path;
signal separation means for coupling signals received over the first signal processing path and the second signal processing path to destructively generate a difference signal when the signals are received in-phase,
wherein the difference signal comprises the modulated data component of the multi-component signal; and
signal delay means for delaying signals on the first signal processing path or the second signal processing path so the signals are received in-phase at the signal separation means.
2. The system of claim 1 , wherein the signal separation means are further configured for coupling the signals received over the first signal processing path and the second signal processing path to constructively generate a sum signal, wherein the sum signal comprises a power component of the multi-component signal.
3. The system of claim 1 , wherein the signal separation means comprise a rat-race coupler having four ports, each port situated one quarter wavelength away from each other around a half of a ring.
4. The system of claim 3 , wherein the four ports include two input ports, a summation output port and a delta output port.
5. The system of claim 1 , wherein the modulated data component and the power component of the multi-component signal are simultaneously received at one or more antennas resulting in the multi-component signal.
6. The system of claim 5 , wherein the modulated data component is transmitted by one or more antennas of a modulated data source and the wireless power component is transmitted by one or more antennas of a wireless power transmission system.
7. The system of claim 1 , further comprising routing means for routing the power component to wireless power processing circuitry.
8. The apparatus of claim 1 , further comprising routing means for routing the modulated data component to modulated data processing circuitry.
9. A signal separation apparatus comprising:
a first input port configured to receive a first signal including a modulated data component and a power component of a multi-component signal via a first path;
a second input port configured to receive a second input signal including the power component of the multi-component signal via a second path; and
a coupling component configured to constructively generate a sum signal when the first signal and the second signal are received in-phase,
wherein the sum signal comprises the power component.
10. The signal separation apparatus of claim 9 , wherein the coupling component is further configured to destructively generate a difference signal when the first signal and the second signal are received in-phase, wherein the difference signal comprises the modulated data component.
11. The signal separation apparatus of claim 10 , further comprising:
a first output port configured to output the sum signal; and
a second output port configured to output the difference signal.
12. The signal separation apparatus of claim 11 , further comprising:
modulated data processing circuitry; and
routing circuitry configured to communicatively couple the modulated data processing circuitry with the second output port.
13. The signal separation apparatus of claim 11 , further comprising:
power processing circuitry; and
routing circuitry configured to communicatively couple the power processing circuitry with the first output port.
14. The signal separation apparatus of claim 13 , wherein the power processing circuitry comprises one or more rectifiers.
15. The signal separation apparatus of claim 11 , wherein each port is situated one quarter wavelength away from each other around a ring.
16. A signal separation apparatus comprising:
a first input port configured to receive a first signal including a modulated data component and a power component of a multi-component signal via a first path;
a second input port configured to receive a second input signal including the power component of the multi-component signal via a second path; and
a coupling component configured to destructively generate a difference signal when the first signal and the second signal are received in-phase,
wherein the difference signal comprises the modulated data component.
17. The signal separation apparatus of claim 10 , further comprising:
a first output port configured to output the sum signal; and
a second output port configured to output the difference signal.
18. The signal separation apparatus of claim 17 , further comprising:
modulated data processing circuitry; and
routing circuitry configured to communicatively couple the modulated data processing circuitry with the second output port.
19. The signal separation apparatus of claim 17 , further comprising:
power processing circuitry; and
routing circuitry configured to communicatively couple the power processing circuitry with the first output port.
20. The signal separation apparatus of claim 19 , wherein the power processing circuitry comprises one or more rectifiers.