This paper presents a high gain millimeter-wave (mmW) low-temperature cofired ceramic (LTCC) microstrip antenna array with a\ncompact, simple, and low-profile structure. Incorporating minimum mean square error (MMSE) adaptive algorithms with the proposed\n64-element microstrip antenna array, the numerical investigation reveals substantial improvements in interference reduction.\nA prototype is presented with a simple design for mass production. As an experiment, HFSS was used to simulate an antenna with\na width of 1mm and a length of 1.23 mm, resonating at 38GHz. Two identicalmmWLTCC microstrip antenna arrays were built for\nmeasurement, and the center element was excited. The results demonstrated a return loss better than 15 dB and a peak gain higher\nthan 6.5 dBi at frequencies of interest, which verified the feasibility of the design concept.
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