image reject mixer

image reject mixer

[′im·ij ′rē‚jekt ‚mik·sər]
(electronics)
Combination of two balanced mixers and associated hybrid circuits designed to separate the image channel from the signal channels normally present in a conventional mixer; the arrangement gives image rejection up to 30 decibels without the use of filters.
References in periodicals archive ?
Two CMD179s can be configured as an image reject mixer or single sideband modulator with external hybrids and power splitters.
In particular, the company's microwave and millimeter-wave mixer ICs have been used to implement image reject mixer (IRM) and single sideband (SSB) upconverter circuits.
A gallium arsenide (GaAs) monolithic microwave integrated circuit (MMIC) image reject mixer (IRM) is available covering discrete frequency bands of 12 to 34 GHz.
The AMMP-6530, a 5 GHz to 30 GHz image reject mixer (5 GHz to 30 GHz LO and RF, DC to 5 GHz IF) featuring -7 dB conversion loss and 15 dB image suppression.
The image reject mixer eliminates the need for an image bandpass filter after the ouptut amplifier to remove signal power at the image frequency.
The image reject mixer removes the need for a bandpass filter after the LNA to remove thermal noise at the image frequency.
The image reject mixer eliminates the need for an image bandpass filter after the output amplifier to remove thermal noise at the image frequency.
An L-band transmitter IF is upconverted to 60 GHz in an image reject mixer and then amplified to the final output level.
Silicon IC designers have tried to overcome the technology inferiority in this area by implementing a complex scheme known as the image reject mixer. This implementation requires two mixers and an orthogonal phase splitting network on the LO port, in addition to a high linearity combining network at the IF ports of the mixers.
The model HMC142 is offered as a mirror-image twin for image reject mixer designs.
The image reject mixer consists of two single-balanced mixers, a 26 to 40 GHz 3 dB 90|degrees~ coupler in the RF input and an in-phase LO power divider at the LO port.
The addition of another quadrature power divider to these components yields an assembly that can be used as a single sideband modulator or an image reject mixer. Other applications for these devices are phase comparators, QPSK demodulators and linear vector modulators.