Design of left-hand transmission line based subwavelength cavity resonators

Resonant condition of this new cavity resonator is different from that of the traditional cavity resonators for its total phase shift need not be a positive integral multiple of 180°. The left-handed transmission line(LHTL) which can realize a negative phase shift is a resonant-slot coupled cavity chain, while the right-handed transmission line(RHTL) which realizes a positive phase shift is a coaxial waveguide, and resonant condition can be satisfied as long as the total phase shift keep zero. Because of its larruping resonant condition, the theory and simulation prove the length of the cavity resonators can be much smaller than that of the traditional cavity resonator.