A high-gain grid array antenna for 60-GHz antenna-in-package applications

This paper presents a high-gain grid array antenna (GAA) on FERRO A6M low temperature co-fired ceramic (LTCC) for 60-GHz antenna-in-package (AiP) applications. The high-gain GAA includes four sub-antennas. Dimensions of the sub-antenna are 15 × 15 × 1 mm³, which is composed of four subarrays. Measured results show that the sub-antenna features impedance bandwidth (BW) 50 - 65.6 GHz, 3-dB gain BW 58.5 - 67 GHz with the maximum gain 15 dBi at 62 GHz, and vertical beams in the broadside direction at 60 GHz. The high-gain GAA has dimensions of 30 × 30 × 1 mm³. Simulated results show that it has impedance BW 55.8 - 63.5 GHz, 3-dB gain BW 56.8 - 64 GHz with the maximum gain of 21.4 dBi at 61 GHz, and vertical beams in the broadside direction at 60 GHz. It is a capable candidate for 60-GHz AiP applications.