A mmWave, SiGe, 2x2 Spiral Array Design Using Sequential Rotation with Dual Circular Polarization for 6G and B5G Communication Applications

With the evergrowing throughputs beyond-5G (B5G) and 6G technologies promise, higher frequency bands need to be explored in order to satisfy the required communication bandwidths. To achieve this, cutting-edge RFIC-process of 130 nm SiGe BiCMOS has enabled the manufacture of integrated circuits capable of reaching Terabit/s communications at frequencies well above 100GHz. In this paper, a 2x2 SiGe spiral antenna array with dual circular polarization is presented. With a bandwidth of 30GHz and a central frequency of 200GHz, it is designed to be a building block for a future, fully integrated “frontend on a chip” in SiGe that could enable future generations of wireless connectivity in the mmWave range.