Patent ID: 11862862
Assignee: NEC CORPORATION
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 2:
3. The communication device according to claim 2, further comprising a phase comparator coupled with the third terminal of the first communicator and the third terminal of the second communicator, wherein a first calibration signal is input to the third terminal of the first communicator while the first communicator generates the difference signal based on the first calibration signal so as to output the difference signal at the second terminal such that the difference signal is transmitted to the second terminal of the second communicator through the connector, wherein the second communicator is configured to generate a second calibration signal responsive to the difference signal so as to output the second calibration signal at the third terminal, and wherein the phase comparator is configured to adjust the first phase value of the first phase shifter and the second phase value of the second phase shifter according to a phase difference between the first calibration signal and the second calibration signal in the first communicator and the second communicator respectively.