What is the difference between the image rejection mixer and single sideband mixer?

It turns out that tuning/testing for image rejection does not guarantee that a unit will have good sideband suppression as an SSB, and of course, this work the other way as well. While the units are essentially identical in design, they are tuned and tested differently. Also, IR’s are non-reciprocal when up/down converting in terms of sideband selection. An IR that converts with a lowside RF will upconvert a highside RF.

Note that neither of these mixers is recommended, however. Our current recommendation is to purchase an MMIQ mixer and to select a IF quadrature hybrid from our catalog or from this table.