Image-Reject and Single-Sideband Mixers

Image-reject mixers (IRMs) and single-sideband mixers (SSMs) play a key role in many of today’s microwave and rf systems [1, 2, 3]. IRMs and SSMs reduce system cost and complexity by removing the need for expensive preselection, and one or more stages of upor downconversion. IRMs simplify downconversion by employing phase-cancellation techniques to separate the downconverted products resulting from the undesired image and desired rf inputs. Similarly, SSMs simplify up-conversion by separating the upconverted lower sideband (LSB) from the upconverted upper sideband (USB). In both IRMs and SSMs, two mixing products are separated and channelized into two different output ports to be further processed or terminated.