Design of Electrically Small, Huygens Dipole Antenna with Quad-Polarization Diversity

Abstract

The design of an electrically small, low-profile, Huygens dipole antenna with four reconfigurable polarization states is presented. This very compact design incorporates both electric and magnetic near-field resonant parasitic (NFRP) elements and a reconfigurable driven element. Reconfigurability is achieved with only six PIN diodes. By manipulating their ON/OFF states, this antenna dynamically achieves four polarization states which include two orthogonal linear (LP) and two circular polarization (LHCP and RHCP) states. The simulated values demonstrate that it is electrically small (ka = 0.944) and low profile (0.0449 λ 0 ) at 1.5 GHz.