Fairview Microwave Debuts New Line of GaAs MMIC IQ Mixers

Fairview Microwave has introduced a line of IQ Mixers that offer high levels of image rejection and sideband suppression. Six new models of IQ mixers include RF and LO frequency bands ranging from 4 GHz to 38 GHz and In-Phase and Quadrature IF bandwidths that range from DC to 4.5 GHz.

“Fairview’s new IQ mixers cover popular frequency bands from 4 GHz to 38 GHz and can be configured as Image Reject or Single Sideband Mixers that utilize highly reliable GaAs MMIC semiconductors integrated into compact drop-in, hermetically sealed packages,” said Brian McCutcheon, General Manager at Fairview Microwave. “More impressive is that all 6 models are available from stock and available for immediate shipment.”

The new MMIC IQ mixers (also known as IQ modulators) leverage a reliable GaAs MESFET semiconductor process that integrates a pair of matched double balanced mixer cells, a 90-degree hybrid and a 0-degree splitter/combiner that produces exceptional amplitude and phase balance performance. This level of integration offers size and performance advantages in comparison to discrete module assemblies.

With the addition of an external 90-degree IF hybrid module, these IQ mixers can be used as either a Single Sideband Up-converter Mixer or an Image Reject Down-converter Mixer. The benefit of image rejection and sideband suppression can reduce overall system cost and complexity by removing the need for pre-selection filtering. Typical applications include point-to-point and point-to-multipoint radio, VSAT, military radar, electronic warfare, satellite communications, test equipment, and sensors.

Performance as an Image Reject Mixer (IRM) includes low conversion loss that ranges from 7.5 to 10 dBm, high image rejection up to 35 dB typical, and LO to RF isolation as high as 42 dB typical. These IQ mixer designs offer excellent linearity with input 1 dB compression as high as +20 dB typical and input IP3 as high as +35 dB typical. LO drive power ranges from +15 to +19 dBm. The compact and rugged drop-in package designs are hermetically sealed with field replaceable connectors and are guaranteed to meet MIL-STD-883 test conditions for humidity and temperature cycle.  

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