# microwave RF information for engineers encyclopedia calculators tools

July 25, 2017

## NewMicrostripCalculator

David Campbell Microstrip Calculator Microstrip Calculator

# Microstrip Calculator

With thanks to David Campbell for the use of this calculator

## Substrate Parameters

 εr: Relative permittivity of the substrate. Tanδ: Loss tangent of the substrate. This parameter is used for the loss calculations. The higher the value, the larger the loss. Rho: Conductor resistivity relative to copper. This parameter is used for the loss calculations. When in doubt, use 1 for copper, .946 for silver, or 1.45 for gold. Height: Height of the substrate. Thickness: Thickness of the microstrip conductor. This can be set to zero, but the calculated loss will not include conductor losses. Frequency: Frequency at which the microstrip transmission line is analyzed or synthesized.

 εr: Tanδ: Rho: Height: Thickness: Frequency:

## Analysis/Synthesis Values

 Width: Zo: Ω Length: Angle: deg. εeff: Loss: dB

 εeff is the calculated effective dielectric constant of the microstrip line due to the nonhomogeneous nature of the structure (i.e., the structure is made up of two dielectric materials: air and the substrate material). Loss is calculated as a combination of dielectric loss and conductor loss at the analyzed/synthesized length. If the conductor thickness is set to zero, the loss will only include the dielectric loss component.

## References

 E. Hammerstad and O. Jensen, "Accurate Models for Microstrip Computer Aided Design", 1980 IEEE MTT-S International Microwave Symposium Digest R.K. Hoffmann, "Handbook of Microwave integrated Circuits", 1987 K.C. Gupta, "Computer-Aided Design of Microwave Circuits", 1981
Author: The Other Editor