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Mimix Broadband introduces a gallium arsenide (GaAs) hetero-bipolar transistor (HBT) monolithic microwave integrated circuit (MMIC) voltage controlled oscillator (VCO), which uses an off-chip resonator to generate output signals from 6 to 12 GHz. The circuit consists of a linear Lange coupler based phase-shifter, a Lange coupler based quadrature generator, a differential amplifier, a four-quadrant I/Q modulator and an output buffer differential amplifier. In addition, this device contains a frequency divider (divide-by-four) for phase-locking, frequency doubler for high frequency output, and two additional buffer amplifiers at the oscillation frequency and at the doubled frequency. From 6 to 12 GHz, this VCO achieves +6 dBm output power and – 100 dBc/Hz phase noise at 100 kHz offset, with 300 MHz instantaneous tuning range achieved through use of an external RF filter. From 12 to 24 GHz, it achieves +3 dBm output power and – 94 dBc/Hz phase noise at 100 kHz offset. This VCO, identified as 9OSC0313, is well suited for wireless communications applications such as millimeter-wave point-to-point radio, local multipoint distribution services (LMDS) and SATCOM.

Mimix Broadband, Inc.

Mimix Broadband
10795 Rockley Road
Houston, TX, 77099