A 220–245 GHz switched beam Butler Matrix in 0.13 µm SiGe BiCMOS technology

This paper presents a 220-245 GHz 4 way Butler Matrix chip in 0.13μm SiGe BiCMOS technology. The chip features four 230 GHz amplifiers with almost 9 dB of gain. A SP4T switch is integrated to select between the four outputs of the beamforming network. Finally, an amplifier used to compensate the losses of the SP4T is integrated. The chip exhibits 0 dB of insertion gain and draws 104 mA from 3.3 V supply mainly consumed by the amplifiers. The entire chip occupies 1.5 × 2.4 mm
²
.