Broadband diplexed or multiplexed power amplifier
AssigneesThe Regents of the University of Colorado, a body corporate, Massachusetts Institute of Technology
InventorsPhilip Zurek, Zorana Popovic
Life of this patent
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Abstract
A wideband amplifier includes a first diplexer receiving broadband input signals and divides them by frequency into a low band input signal and a high band input signal. The amplifier has separate high band and low band amplifiers coupled to amplify the low and high band input signals, and a second diplexer coupled to combine outputs of the low and high band amplifiers to form a wideband output. A method of amplification of an input signal includes separating the input signal into high and low band signals, separately amplifying the high and low band signals, and combining amplified high and low band signals into an output signal.
Claims22
A wideband amplifier configured to receive a broadband input signal and provide an amplified broadband output signal comprising:
- a first multiplexer coupled to receive the broadband input signal and to divide the broadband input signal by frequency into a first-band input-signal and a second-band input-signal, the first-band input-signal having a lower frequency band than the second-band input-signal;
- a first band amplifier coupled to amplify the first-band input-signal and provide a first band output signal;
- a second band amplifier coupled to amplify the second-band input-signal and provide a second band output signal;
- and
- a second multiplexer coupled to combine the first band output signal and the second band output signal into the amplified broadband output signal;
- wherein:
- (i) a frequency range of the first-band input-signal overlaps a frequency range of the second-band input-signal in a transition region;
- and (ii) a frequency range of the first band amplifier overlaps a frequency range of the second band amplifier in the transition region;
- wherein, for frequencies in the transition region, a first signal path through the first multiplexer, the first band amplifier, and the second multiplexer has a first group delay matching a second group delay of a second signal path through the first multiplexer, the second band amplifier, and the second multiplexer;
- and
- the second multiplexer is configured to sum the first band output signal with the second band output signal to provide gain in the transition region.
Dependencies are inferred from the claim text.