A 12 GHz VGA showing a gain variation range from −9 dB to 13 dB with a linear-in-dB gain control feature is presented in this work. As the gain is changed, the phase shift over the entire 10–14.4 GHz bandwidth varies as little as ≤2◦ due to a compensation circuitry that reduces the input-output phase shift sensitivity to gain variations in a robust manner with respect to temperature changes. Such a reduced phase shift variation is particularly useful to simplify the signal phase/amplitude control for the various paths of a phased array system, and allows to implement ultra-low sidelobe phased arrays. The VGA prototypes, implemented in a SiGe bipolar technology, show a noise figure of 5.1 dB, an IIP3 of −3 dBm, a P1dB of −17 dBm, and a power consumption of 83 mW.

A 12 GHz 22 dB-Gain-Control SiGe Bipolar VGA with 2° Phase-Shift Variation

PADOVAN, FABIO;NEVIANI, ANDREA;BEVILACQUA, ANDREA
2016

Abstract

A 12 GHz VGA showing a gain variation range from −9 dB to 13 dB with a linear-in-dB gain control feature is presented in this work. As the gain is changed, the phase shift over the entire 10–14.4 GHz bandwidth varies as little as ≤2◦ due to a compensation circuitry that reduces the input-output phase shift sensitivity to gain variations in a robust manner with respect to temperature changes. Such a reduced phase shift variation is particularly useful to simplify the signal phase/amplitude control for the various paths of a phased array system, and allows to implement ultra-low sidelobe phased arrays. The VGA prototypes, implemented in a SiGe bipolar technology, show a noise figure of 5.1 dB, an IIP3 of −3 dBm, a P1dB of −17 dBm, and a power consumption of 83 mW.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/3209697
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