An electromagnetic band gap resonator antenna (ERA) with an extremely small footprint is presented. The proposed ERA has a peak measured gain of 15.6 dBi and an excellent measured 3dB gain-bandwidth of 27%. The four-layer composite superstructure used in this ERA takes the shape of a circular disc with the ground plane radius equal to that of the superstructure. Its footprint area is only 1.7λ02 at the lowest operating frequency. The average measured aperture efficiency of this ERA is nearly 90%. The side lobe levels are well below-12 dB over most of the operating bandwidth and the cross polarization levels are below-17 dB.
Bibliographical noteErratum can be found at Microwave and Optical Technology Letters volume 57(9), p2228, https://doi.org/10.1002/mop.29247
- resonant cavity
- Fabry- Perot cavity
- cavity resonator
- EBG resonator