US 11,706,075 B2
High-efficiency transmitter
Sudipto Chakraborty, Plano, TX (US); and Rajiv Joshi, Yorktown Heights, NY (US)
Assigned to INTERNATIONAL BUSINESS MACHINES CORPORATION, Armonk, NY (US)
Filed by INTERNATIONAL BUSINESS MACHINES CORPORATION, Armonk, NY (US)
Filed on Mar. 12, 2021, as Appl. No. 17/199,867.
Prior Publication US 2022/0294683 A1, Sep. 15, 2022
Int. Cl. H04B 1/04 (2006.01); H04L 27/36 (2006.01); G05F 1/46 (2006.01); H01Q 3/36 (2006.01); H04L 7/04 (2006.01)
CPC H04L 27/36 (2013.01) [G05F 1/46 (2013.01); H01Q 3/36 (2013.01); H04B 1/04 (2013.01); H04L 7/04 (2013.01)] 17 Claims
OG exemplary drawing
 
8. A phased-array transmitter, comprising:
a plurality of radio front-ends that each transmit a respective phase-shifted version of a polar-modulated signal, each comprising:
a driver to output a polar-modulated signal according to a phase-modulation signal and an amplitude-modulation signal; and
a voltage regulator connected to the driver, having a bandwidth lower than a bandwidth of the amplitude-modulation signal, with the amplitude-modulation signal controlling an input of the voltage regulator and with the amplitude-modulation signal further being combined with an output of the voltage regulator to control an amplitude of the output of the driver to compensate for bandwidth cutoff noise in the voltage regulator; and
a phased antenna array that transmits the phase-shifted polar-modulated signals.