Abstract
This paper focus is on the neutralization technique of the unwanted physical disturbances in the radio frequencies (RF) and digital electronic structures. Most of parasitic effects induced in these systems can be modeled by RC- and LC- passive networks. For canceling these disturbing effects, we can proceed with the transfer function neutralization in the considered operating frequency bands. This neutralization concept is developed by using first, a left-handed (LH) and negative group delay (NGD) circuits inspired from metamaterials. The fundamental theoretical approach illustrating the RC- and LC-effects transfer function neutralization is described. Synthesis relations enabling to determine the elements of the LH and NGD circuit correctors in function of the perturbation parameters are established. Numerical and experimental demonstrators are presented to validate the technique proposed. This later is particularly useful for the improvement of the analogue and digital signal integrity degraded by electromagnetic interferences.
Highlights
Long ago, Sommerfeld and Brioullin [1,2,3,4,5,6] investigated the problem of the light propagation in the region of the dispersive media having dispersive refractive index n(ω) at the angular frequency ω
A neutralization technique enabling to suppress parasitic effects modelled by LC, RC- and RLC-networks is developed in this paper
The technique is based on the use of LH [71,72] and negative group delay (NGD) active circuits inspired from the metamaterials
Summary
Sommerfeld and Brioullin [1,2,3,4,5,6] investigated the problem of the light propagation in the region of the dispersive media having dispersive refractive index n(ω) at the angular frequency ω They pointed out theoretically that in this region which appeared generally within an absorption line, the group velocity vg (ω) can be superluminal, i.e., greater than the vacuum speed of light c and can even become negative: vg (ω) = c /{Re[n(ω)]+ω ⋅Re[∂n(ω) / ∂ω]}. The left-handed (LH) lumped passive circuit capable to generate NGD effect for microwave signals up to GHz has been introduced by the group of Mojahedi [15,16] The topology of this circuit was established from the 1D metamaterials modelling of the array split ring resonators having simultaneously negative permittivity and negative permeability.
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