Stacked Patch Antenna Array on LTCC Substrate Operated at 28 GHz

This study develops a 28-GHz patch antenna array using LTCC (Low Temperature Co-fired Ceramic) technology, for use in applications of LMDS (Local Multipoint Distribution Service). The design comprises 2x2 stacked patch elements and parallel-fed networks, yielding a wide bandwidth and superior gain performance. Broadband performance is achieved by varying the dimensions of the parasitic patch. The arrays are excited through using a novel opposite-side feeding structure to prevent any electrical effect on the parasitic patch. Measurements correlate closely with the simulation results: a gain of 10.35 dBi and a bandwidth of 2.85 GHz (26.75-29.6 GHz) are achieved.