High efficiency outphasing transmitter for electronically scanned arrays

摘要

High efficiency transmitters for electronically scanned arrays (also known as electronically steered antennas or ESAs) are disclosed. The transmitters in accordance with the present disclosure utilize outphasing power amplification. In one embodiment, the outphasing transmitter includes a phase shifting device. The phase shifting device is configured for phase shifting an input signal and providing a pair of phase shifted signals for each emitting element of the EAS. The outphasing transmitter also includes an outphasing power amplifier associated with each emitting element. Each outphasing power amplifier is configured for separately amplifying the pair of shifted signals for each emitting element and combining the separately amplified signals for each emitting element for transmission.

主权项

1. An outphasing transmitter for an antenna, the antenna including a plurality of emitting elements, the outphasing transmitter comprising:
a phase shifting device, the phase shifting device configured for phase shifting an input signal and providing a pair of phase shifted signals for each particular emitting element of the plurality of emitting elements, wherein the pair of phase shifted signals for each particular emitting element includes a first signal generated by phase shifting the input signal by an offset phase for the particular emitting element minus a delta phase and a second signal generated by phase shifting the input signal by the offset phase for the particular emitting element plus the delta phase, wherein the offset phase for each emitting element is adjustable to facilitate beam steering for the antenna, and wherein the delta phase is adjustable to change output power of the antenna; and an outphasing power amplifier associated with each emitting element, the outphasing power amplifier configured for separately amplifying the pair of shifted signals for each emitting element and combining the separately amplified signals for each emitting element for transmission.