A High-Efficiency 28-GHz Outphasing PA with 23-dBm Output Power Using a Triaxial Balun Combiner
It is a novel power combiner architecture that can be used for outphasing power amplifiers which can be used for both board level and integrated circuits.
Researchers at UC San Diego have an invention that is a fully prototyped 28-GHz outphasing RF power amplifier with record average efficiency based on a low-loss Chireix combiner implemented as a planar triaxial balun in a SiGe BiCMOS process. The planar power combiner has a measured insertion loss of 0.52 dB. The PA reaches a saturated output power PSAT of 23 dBm from a supply of 4.0 V with a peak PAE of 41% at 21 dBm and a PAE of 34.7% at a 6 dB backoff. The PA transmits a 64-QAM OFDM waveform with an EVM of 3% at an average output power of 14.3 dBm and PAE of 25.3%.
State Of Development A working prototype has been developed. Intellectual Property Info A provisional patent has been submitted and the technology is available for licensing. Related Materials Tech ID/UC Case 29394/2018-067-0 Related Cases 2018-067-0
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