Abstract: Examples include multi-band antenna systems and methods of operating same. In one example an antenna system includes a radiating element configured to receive and transmit electromagnetic energy at a first frequency and a second frequency, and a frequency selective surface positioned in proximity to the radiating element and configured to reflect the electromagnetic energy at the first frequency and to pass the electromagnetic energy at the second frequency.

Abstract: A patch antenna system comprises a patch antenna and preferably two sets of strip-shaped parasitic elements arranged over the radiating edges of the patch antenna. The parasitic elements are spaced away from the patch antenna. Preferably, the material placed between the patch antenna and parasitic elements is selectively deposited to introduce an air gap between the elements and the antenna while also introducing mechanical support for the elements. This selective deposition of material also relaxes the requirements for high radio frequency (RF) performance, thereby reducing cost. One advantage of this solution is that it enables circular polarization to be achieved.