Priya Vemparala Guruswamy worked as a Development Test engineer at Mentor Graphics Corporation and is currently working as a SI Engineer at Micron Technology. She graduated from University of Colorado Boulder in 2017 with a MS in Electrical Engineering with RF/Signal Integrity as her specialization. High speed serdes channel simulation and DDR technology for PCB applications are her areas of interest.
The dielectric constant, Dk, of a laminate will affect the characteristic impedance of a transmission line and its time delay. If you hope to achieve a specific target characteristic impedance on the first pass, it is essential to know the Dk of each laminate layer. Here is a quick, simple way of measuring it.