Abstract

In this work, the integration of conformal patch antennas in a reflector is proposed as a solution for a dense multi-band antenna. The patch antennas are used to cover sub-6 bands whilst the reflector operates in the millimeter frequency range. One of the key aspects of the design is the definition of the thickness of the substrate of the conformal patches as a multiple of 0.5$\lambda_0$ at the millimeter wave frequency to produce in-phase reflections. A proof of concept covering 28 GHz and two sub-6 bands has been manufactured and measured showing the viability of this solution to be used in 5G terminals.