Based On The Gap Coupled Cavity Chain Different To The Transmission Line Resonator

Metamaterial is one of the frontiers of Physics and Electromagnetism currently, which is a kind of artificial material with simultaneously negative permittivity and permeability. It has many special characters different from normal materials, such as negative refraction, inverse Doppler effect, inverse Cerenkov radiation, anti-paralled phase and group velocities, and so on. There are two methods to realize metamaterial at present: the first is (ROD) and split ring resonators (SRR) array and the other is based on transmission line. One dimension metamaterial is also called left-handed transmission line, which will be most probably used in microwave application because the most of proposed metamaterial are based on left-handed transmission line. In this paper, some special characters of metamaterial are analyzed and the realization of metamaterial are mainly focused on. Based on above analysis, a new type of left-handed transmission line based on waveguide is proposed, and then the application of it is discussed.In this paper,according to classical EM filed theory and circuit theory, this project will establish the transmission mechanism for EM wave in left-handed material(LHM) by strictly mathematic deduction. Unit equivalent circuit of Transmission line for LHM can be proposed in accordance with the transmission mechanism.Working on realizing the unit equivalent circuit by loading metallic periodic structure in LHM with higher working frequency, power capacity as well as lower loss can be designed. The rationality of the new structure will be proved by means of simulation and experiment and the desinging method for the LHM will be given atlast.At first, a novel realization of left-handed transmission line is presented; the proposed structure is based on resonant-slot coupled cavity chain. The dispersion characteristic of two different resonant-slot coupled cavity chain cells are studied in the way of field theory and FEM eigenmode simulation, a LH Passband . at last, a backward wave behavior is predicted and demonstrated unambiguously from driven modal simulation.For more, a new of cavity resonators is presented according to the proposed left-handed transmission line。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 t ransmission 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 it s 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.