DESIGN TOOL

Impedance & Delay Calculator

Calculate microstrip and stripline impedance, propagation delay, reflection coefficients, and via stub resonance in real time.

Microstrip Impedance

IPC-2141

Calculate characteristic impedance of an outer-layer microstrip trace using the IPC-2141 empirical formula.

Z0 (Characteristic Impedance) --
Er_eff (Effective Dielectric) --
Propagation Velocity --
Propagation Delay --

Stripline Impedance

SYMMETRIC / ASYMMETRIC

Calculate characteristic impedance of an inner-layer stripline trace (between two ground planes).

Z0 (Characteristic Impedance) --
Propagation Delay --

Reflection Coefficient Calculator

IMPEDANCE MISMATCH

Calculate the reflection coefficient at source and load discontinuities. A matched system has zero reflection.

Gamma at Source (line looking back) --
Gamma at Load (line looking forward) --
Reflected Voltage (% of incident) --
Return Loss at Load --

Via Stub Resonance

BACK-DRILL

Calculate the quarter-wave resonant frequency of a via stub. At this frequency, the stub acts as a short circuit and creates a notch in the insertion loss.

Quarter-Wave Resonant Frequency --
Recommendation --