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Wave propagation in single layer substrate integrated waveguides (SIWs) loaded by embedded split-ring resonators (ESRRs) is discussed theoretically and experimentally. It is shown that the loaded SIW can support a backward-wave passband below the cutoff frequency (f<sub>c</sub>) of the host SIW or a stopband will appear above f<sub>c</sub> if the effective… (More)
Keywords: Substrate integrated waveguide (SIW) Three-dimensional embedded split ring resonators (3-DESRRs) Transmission line (TL) Metamaterial (MTM) a b s t r a c t A substrate integrated waveguide (SIW) loaded by three-dimensional embedded split ring resonators (3-DESRRs) is discussed theoretically and experimentally. The 3-DESRR structure which has proved… (More)
Imaging of rebars inside a concrete block is investigated using the quadratic forward model of RF Tomography for three different antenna configurations. Reconstructed images are obtained using the method of moments.