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Concept of Integrating 4G LTE and Millimeter-wave 5G Antennas within Zero-Bezel Cellular Devices

This paper proposes a packaging technology of integrating 4G long-term evolution (LTE) and millimeter-wave (mmWave) 5G antennas for zero-bezel cellular devices. To verify the feasibility of the proposed technology, both antenna types are designed and coherently integrated into the cellular device prototype. The fabricated 2×2 4G LTE MIMO prototype exhibits total system efficiencies of more than 50% over the entire LTE spectrum (699–960 MHz and 1710–2690 MHz). The over-the-air evaluation of the fabricated mm Wave 5G phased array AoD module confirms 3-dB beam scanning range of more than ± 25° with an estimated maximum EIRP of 14.14 dBm at 28 GHz.