Fully Planar CSRR-SIW Slot Antennas of Optimized Gain and Enhanced Bandwidth for Millimeter Wave and 5G Communications

We present fully planar, low-cost and easy to fabricate slot antennas which operate at two different frequency bands. The designs are based on the CSRR-SIW concept, which is a strong alternative for cost-effective implementation for millimeter circuits and antennas. The proposed antennas exhibit very competitive characteristics in terms of their bandwidth and gain.