analysis and design of a novel broadband and high-efficiency class-e/fj power amplifier

This paper presents a novel hybrid class-e/fj power amplifier (pa) that integrates class-e/f pa and class-j pa to formulate a high-efficiency as well as broadband performance. the theoretical relationships of the class-e/f amplifier have been thoroughly examined, and the corresponding relationships and diagrams have been obtained. furthermore, in the next step, theoretical analysis for class-j has been derived, and the necessary conditions for achieving a strengthening relationship between class-e/f and class-j to achieve a hybrid class-e/fj pa have been investigated. through the judicious configuration of parameter values, the proposed design achieves an efficiency range spanning from 61.2% to 73.4% across the 1.3-3.1 ghz. the paper delineates a systematic design process for a broadband class-e/fj pa based on derived theories. to validate the proposed approach, a meticulous design and fabrication process is undertaken for a 1.3-3.1 ghz broadband class-e/fj pa. measurement results demonstrate that the pa can deliver a saturated output power ranging from 39.3 dbm to 42 dbm, accompanied by a gain within the 8-12 db range. additionally, the power added efficiency (pae) falls within the range of 58.9%-67% within the specified frequency band. a comparative analysis with similar predecessors reveals that the proposed pa outperforms others, exhibiting superior performance across a wide bandwidth.