Broadband characteristics investigation of waves in a left-handed miniaturized waveguide loaded with ISRRs
Q. Wu, F.-Y. Meng, J. Wu, L.-W.Li
Applied Physics A
Volume: 87, Issue: 2, May 2007
In this paper, broadband transmission characteristics of waves in a left-handed miniaturised rectangular waveguide (LHMRW) loaded with improved split ring resonators (ISRRs), which shows that the bandwidth of negative permeability is up to 5.6 GHz by an optimization design, are investigated. Some unexpected phenomena such as the discontinuous left-handed passband below the cutoff frequency of the dominant TE mode, which cannot be transformed into a continuous one by any impedance matching approach, are observed. The EM field distributions in the LHMRWare calculated so as to explain these phenomena. Results show that the LHMRW can be considered as an open ended resonant cavity instead of a normal
transmission structure. In addition, the backward wave inside
the time domain in the LHMRWis directly observed.
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