Résumé
This paper presents the design and measurement results for a wideband SiGe front-end module operating from 24.25 GHz to 30.5 GHz, which integrates a passive phase shifter (PS), a variable gain and phase-inversion amplifier (VGA) with low impedance and minimal phase variation, and a linear power amplifier (PA) designed for beamforming systems. The PS with the VGA provides a full 360°tuning with a resolution of 5.6°, while the gain control spans 17 dB in 0.5 dB increments. Measurements present a maximum gain of 27 dB, Psat of 21 dBm, P AEmax of 31.2% at 27 GHz. Developed with 130 nm SiGe BiCMOS technology, the circuit occupies an area of 0.53 mm 2 excluding pads.