Fully integrated 60 GHz switched-beam phased antenna array in glass-IPD technology

A 1 x 4 double-sided dipole antenna array with an associated Butler matrix beamforming network was designed and implemented at 60 GHz using glass-based integrated passive device (IPD) technology. Owing to the chip area limitation, the spacing between the antenna elements is similar to 0.32 lambda(0). Experimental results show that beams are successfully generated in the -62 degrees, -23 degrees, 22 degrees and 50 degrees directions, with total array gains of 2.5, 3.8, 4.3 and 3.0 dBi, respectively, which agree with simulation predictions. This successful demonstration provides a feasible solution for 60 GHz radio in heterogeneous system-in-package (SiP) integration.