Microstrip Transmission Line Loaded by Split-Ring Resonators Tuned by Ferroelectric Thin Film

Abstract

Abstract-The resonance frequency of Split-Ring Resonators (SRRs) loading a microstrip transmission line was tuned by means of a Ba 0.5 Sr 0.5 TiO 3 (BST) ferroelectric thin film. For a bias of 30 Volts, we obtained a band-stop response with a shift around 7% of the resonance to higher frequencies in K u band. The originality of the device under test is (i) the utilisation of single C-shaped SRRs, (ii) the localisation via chemical etching of the BST film to voltage controlled interdigitated capacitances and (iii) the enhancement of the operating frequency (around 17 GHz).

Electrical Characterizations of Lead Free Sr and Sn Doped BaTiO3 Ferroelectric Films Deposited by Sol-Gel

“…The objective was to evaluate the dielectric properties in high frequencies in order to realize tunable microwave components. We give here only some references (Burgnies et al, 2007;Houzet et al, 2008Houzet et al, , 2010Khalfallaoui et al, 2010) concerning our work as it is out of the scope of this chapter which is focused on low frequencies from DC to 1 MHz. Fig.…”

Implementation of a compact microstrip power divider using novel split ring resonator

“…However, the measured central frequency (4.75 GHz) is lower by approximately 1.2% than the simulated one (4.8 GHz). This shift can be attributed to fabrication tolerances, connectors, and the substrate properties [27][28][29][30][31]. The measured return loss is below −36 dB, and the measured insertion loss, at each branch, is approximately −3.2 dB at the central frequency.…”

Reconfigurable and Tunable Metamaterials: A Review of the Theory and Applications

“…There are a few candidate materials that have been used for permittivity tuning of metamaterials, including Ba 0.5 Sr 0.5 TiO 3 (BST) ferroelectric films, liquid crystal, and Ga-Sb-Te (GST) phase-change materials. BST films provide a permittivity change under voltage bias and have been used as a substrate for tuning SRR elements along a transmission line at microwave frequencies [115,116]. BST can also be tuned via change in temperature as demonstrated in [13] for tuning the resonance frequency of SRRs.…”