A High-Gain Wideband Antenna With Frequency Selective Side Reflectors Operating in an Anti-Resonant Mode

We propose a new high-gain wideband antenna with simple frequency selective reflectors (FSRs), which are installed at both sides of a source dipole antenna. The main role of each FSR is to transmit electromagnetic waves in a boresight direction, which is intended to increase antenna gain and an impedance-matching bandwidth at the same time. To do that, we operate the antenna in an anti-resonance mode, which is a conceptual shift of conventional Fabry-Perot (FP) resonance operation. Hence, the proposed FSRs operating under the anti-resonance mode collimate outgoing waves toward their lateral direction rather than a conventional normal direction. As a result, we can improve both the realized gain and the bandwidth up to about 12 dBi and 41% ( S₁₁ = -10 dB), respectively, only with one dipole antenna. All experiments show good agreement with predictions, which confirm the validity and usefulness of our approach.