A mixer separates IF components IF1, IF2 of the same frequency which are images of different frequency RF signals RF1, RF2 beating with a given LO signal. The LO signal is applied to a FET active power divider and applied to the drains of a pair of balanced FET mixing elements. The FETs for the active...http://www.google.fr/patents/US5410743?utm_source=gb-gplus-shareBrevet US5410743 - Active image separation mixer
