Phase shifter with true time delay

摘要

A phase shifter includes a power splitter to split an RF signal into two separate signals. A true time delay (TTD) device is combined to the power splitter to receive one of the two separate signals and delay such signal in time to provide a time-delayed component signal. A first amplifier is combined to the power splitter to modify the other separate signal and a second amplifier is combined to the TTD device to modify the time-delayed component signal. A combiner is combined to both the first and the second amplifiers to combine the modified signal and the modified time-delayed component signal. The phase of the modified signal remains substantially the same with respect to the RF signal and the phase of the modified time-delayed component signal is ninety-degrees from the RF signal.

主权项

1. A phase shifter comprising:
an RF port configured for sending or receiving an RF signal; a power splitter combined to the RF port configured for splitting the RF signal into two separate signals; a true time delay (TTD) device combined to the power splitter configured for receiving one of the two separate signals and delaying in time the one of the two separate signals for providing a time-delayed component signal; a first amplifier combined to the power splitter and configured for receiving and amplifying one of the two separate signals with respect to the other separate signal and providing a modified signal; a second amplifier combined to the TTD device configured for receiving and modifying the time-delayed component signal and providing a modified time-delayed component signal; a controller combined to the first amplifier and the second amplifier, the controller configured for providing a first control signal to the first amplifier for controlling a gain of the first amplifier and for providing a second control signal to the second amplifier for controlling a gain of the second amplifier in order to emphasize or deemphasize a first phase component of the modified signal and a second phase component of the modified time-delayed component signal; and a combiner combined to the first amplifier and the second amplifier configured for combining the modified signal and the modified time-delayed component signal.