Antenna arrays in MCM-D technology fed by coplanar CPW networks

In this paper, the design, fabrication, and characterization of planar ante nna arrays in the MCM-D technology are presented. The arrays are fed by cop lanar feeding networks built using coplanar-waveguide lines. 2 x 2 and 4 x 4 arrays of slot dipoles designed to work in K-band, around 25 GHz, are als o presented. The analysis was carried out both theoretically and experiment ally. The results include the return loss, radiation patterns, and antenna gain. The proposed arrays are compatible with the driving electronics techn ology, enjoying high-impedance bandwidth, tow cross polarization, high gain , and high radiation efficiency.