Demonstration of circularly-polarized leaky-wave antenna based on pseudo-traveling wave resonance

A circularly-polarized leaky-wave radiation from metamaterial-inspired antenna based on pseudo-traveling wave resonance was demonstrated for the first time. The resonant structure was composed of a phase-nonreciprocal composite right/left handed microstrip line fabricated on the circumference of a normally magnetized polycrystalline yttrium iron garnet disc. Rotation direction of the circular polarization was successfully switched by changing the direction of the applied dc magnetic field.