# History of Class-F and Inverse Class-F Techniques: Developments in High-Efficiency Power Amplification from the 1910s to the 1980s

> Research article (IEEE Microwave Magazine, 2018) · cited 12× · AI/ML

**Wikidata**: [openalex:W2896694074](https://www.wikidata.org/wiki/openalex:W2896694074)  
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