Antenna arrays 1 Bandwidth 1 Bidirectional 1 Broad-band antenna 1 Circular polarization 1 Circularly polarized antennas 1 Coaxial probe feed 1 Dipole antennas 1 Electric excitation 1 Electric impedance 1 End-fire 1 Endfire circularly polarized antenna 1 Magnetic resonance 1 Magnetic separation 1 Microwave antennas 1 Same sense Wide-band 1 Wideband characteristics 1 endfire circularly polarized antenna 1 same sense 1 wideband 1