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(a) Equivalent circuit of a unit cell of the CRLHTL. (b) Dispersion of the designed balanced transmission line, indicating two backward-wave bands and two forward-wave bands. Circles indicate two zero phase velocity points for which we designed the phase matching. Crosses mark two backward waves for which the phase matching condition is satisfied.
(a) Unit cell of the experimental structure. (b) Comparison between simulated (solid) and measured (dots) and parameters for a single unit cell of the transmission line.
(a) Photograph of the sample containing 11 unit cells. (b) Dispersion of the 11-cell structure (points), overlaid with the simulated dispersion (lines). Right plot shows the residual error for dispersion retrieval.
Transmitted FF and SH signals for the case of zero phase velocity phase matching at 1.039 GHz (: FF; ×: SH), and for the backward-to-backward harmonic generation at 0.823 GHz, (stars: FF, squares: SH). The lines extrapolate the low power SH signal to show the influence of higher order nonlinear processes.
Parameters of the equivalent circuit model.
Dimensions of the transmission line sections.
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