Two-Port, Dual-Circularly Polarized, Low-Profile Broadside-Radiating Electrically Small Huygens Dipole Antenna

A two-port dual-circularly polarized (CP), low-profile broadside-radiating electrically small Huygens dipole antenna is presented that has an advanced feed network and multilayer stacked layout of its electric magnetic near-field resonant parasitic (NFRP) elements. It radiates left-hand CP (LHCP) or right-hand (RHCP) fields at 1.5 GHz resonance frequency depending on the selected port. The measured results, in good agreement with simulated values, demonstrate (ka = 0.94) low profile (0.053λ 0 ), relative to longest wavelength -10 dB impedance bandwidth. port isolation over 15.6 within 0.99% fractional When 1 (port 2) excited, peak realized gain front-to-back ratio (FTBR) values are, respectively, 1.82 dBi (1.81 dBi) 4.1 (4.5 dB).