Quasi-optical power-combining techniques

Quasi-optical power-combining arrays overcome some limitations of traditional power combining schemes, and are expected to facilitate development of compact and reliable millimeter-wave systems. This paper presents an overview of 1993 quasi-optical power combining technology, focusing on approaches for direct DC-to-RF conversion and beam amplification. Arrays for frequency up- and down-conversion, and beam control are briefly reviewed, and possible applications and future research efforts are identified.