Figure 5. Frequency responses of the microscope glass a) the impedance line Z <50 Ohm (8mm) b) the impedance line Z> 50 Ohm (0.4mm)

From

Wideband Characterization of Microstrip Technology with Borofloat 33 and Some Classic Transparent Glasses

Abdoulaye Sissoko, Anne Chousseaud, Badié Diourté, Tchanguiz Razban, Marc Brunet, Stéphane Ginestar

American Journal of Electrical and Electronic Engineering. 2023, 11(1), 1-6 doi:10.12691/ajeee-11-1-1