In this work, an 8-to-24 GHz 6-bit bidirectional Common-Chain (CC) is presented that enables low noise, wide bandwidth (BW) compact core-chip in SiGe BiCMOS with low power dissipation. The chain contains phase shifter (PS), attenuator and bidirectional amplifiers (BDAs). The CC succeeds 16.12 dB peak gain at 21.5 GHz. It achieves a mean 4.41°/0.4 dB RMS errors for 16 GHz of BW, while dissipating 55 mW of power. To the best of authors’ knowledge, this work succeeds the best gain, noise, resolution, and SWaP-C features for 100% of fractional BW in SiGe BiCMOS.