Patent ID: 11885869
Assignee: nan
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 3:
4. The smart AFC apparatus according to claim 1, wherein the phase shift module comprises:
a digital phase shifter, connected to the first signal input terminal and configured to:
receive the incident wave from the first signal input terminal, perform the phase shift on the incident wave according to the phase shift parameter so as to generate a first phase-shifted signal, and output the first phase-shifted signal to a first filter;
the first filter, connected to the digital phase shifter and configured to: filter the first phase-shifted signal to generate a first filtered signal, and output the first filtered signal to a first attenuator;
the first attenuator, connected to the first filter and configured to: attenuate the first filtered signal to generate a first attenuated signal, and output the first attenuated signal to a second filter; and
the second filter, connected to the first attenuator and configured to: filter the first attenuated signal to generate a second filtered signal, and output the second filtered signal as the phase-shifted signal to the phase detection module.