The present disclosure relates to electromagnetic resonator antennas and methods for their manufacture. An example electromagnetic resonator antenna includes a first substrate and a first metal layer disposed on the first substrate. The first metal layer includes copper. The antenna also includes a dielectric layer disposed on the first metal layer. The dielectric layer includes a polarizable electrical insulator. The antenna additionally includes a second metal layer disposed on the dielectric layer. The second metal layer includes copper. The antenna yet further includes a second substrate disposed on the second metal layer and a feed line electrically coupled to at least one of the first metal layer or the second metal layer. At least one aspect of at least one of the first metal layer, the dielectric layer, or the second metal layer is selected based on a desired resonance frequency.