Custom MMIC announced three GaAs MMIC mixers for C-, X-, K- and Ka-Band applications. The CMD251C3 fundamental mixer, CMD252C4 I/Q mixer and CMD180 fundamental mixer deliver best-in-class isolation and conversion loss performance with low input power. These new MMIC mixers help increase system dynamic range while reducing LO power and subsequent filtering requirements. They are ideal for high performance commercial, military, aerospace and satellite communications applications.

The CMD251C3 is a general purpose, fundamental double-balanced MMIC mixer in a 3 x 3 mm leadless surface-mount package that can be used for up- and down-converting applications between 4 and 8.5 GHz (C-Band). This fundamental mixer has high LO to RF and LO to IF isolation of 36 dB, due to optimized balun structures, and can operate with an LO drive level as low as +15 dBm. This GaAs mixer also demonstrates a wide IF bandwidth from DC to 2.2 GHz and a very low conversion loss of only 7 dB.

The CMD252C4 is a 4 to 8 GHz (C-Band) compact I/Q MMIC mixer in a 4 x 4 mm leadless surface-mount package. This fundamental mixer is comprised of two double-balanced mixer cells and a 90 degree hybrid. An external IF hybrid is needed to achieve the image rejection of 30 dB; this combination is a much smaller alternative to higher cost hybrid image reject mixers and single sideband up-converter assemblies. The CMD252C4 also features a wide IF bandwidth from DC to 2.4 GHz with a low conversion loss of only 6.5 dB as an image rejection mixer.

The CMD180 is a general purpose, fundamental double balanced MMIC mixer available in a small die size. This GaAs MMIC can be used for wideband up- and down-converting applications between 20 and 32 GHz (X-, K- and Ka-Band). It features very high isolation to both the RF and IF ports of 36 dB, due to optimized balun structures, and can operate with an LO drive level as low as +9 dBm. The CMD180 has a wide IF bandwidth from DC to 10 GHz, with a low 7 dB conversion loss.