A 24 GHz Active Antenna in Flip-Chip Technology with Integrated Frontend

A novel slot antenna is presented which is realized using flip-chip technology and allows integration of active chips into the antenna. It is compatible with conventional planar assembly methods and exhibits resonant properties that can be used as an input/output filter. Combining 4 antennas one obtains a compact module with beam switching in all lateral directions. For 24 GHz, only 12 mm side length is required. The paper describes antenna design and presents measurement results of a 24 GHz version with integrated transmitter VCO