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Schlaffer, Erich
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article
Experimental analysis of grounded coplanar waveguide structures based on different PCB processes with uncertainty analysis
Abstract
<p>This paper presents an experimental characterization of grounded coplanar waveguides (GCPWs) with uncertainty analysis. GCPW lines to be analyzed were fabricated using different subtractive printed circuit board (PCB) manufacturing processes: panel plating method and pattern plating method. Using a modified multiline method, we have extracted the propagation constants with uncertainty propagation analysis. This considered instrumentation noise, length uncertainty, and impedance mismatch caused by variations in cross-section due to the fabrication capabilities of each manufacturing process. By reformulating the propagation constant, we obtained the attenuation per unit length and the effective relative permittivity as a function of frequencies up to 43.5 GHz with 95% confidence interval. These results showed good agreement with full-wave simulations and highlighted the differences between the PCB manufacturing processes.</p>