Skip to content

Directional Coupler Calculator

3 views Free
Directional Coupler Calculator | Coupling & Insertion Loss Tool
Please enter valid values.
RESULTS
Coupling
-
Coupling Loss
-
Insertion Loss
-
Directivity
-

Directional Coupler Port Schema

A 4-port directional coupler samples high-frequency signals directionally. Power entering the main Input line routes fundamentally straight to Output nodes while a designated fractional decibel component tracks onto the secondary Coupled path block structure.

In P1 Out P2 Coupled Port P4 Isolated Port P3 Directional coupler

Formulas & Mathematical Logic

The matrix processes numerical inputs relative to standard logarithmic boundary rules exactly:

Power Translation Scalings:
If Watts: dBm = 10 * log10(W) + 30
Coupled Signal Attenuation Logics:
Coupling = -10 * log10(P4 / P1)
Coupling Loss = -10 * log10(1 - P4 / P1)
System Network Leakage Evaluations:
Insertion Loss = -10 * log10((P2/P1) + (P3/P1) + (P4/P1))
Directivity = -10 * log10(P3 / P4)

Practical RF Coupler Example

Input Port Parameters

Input Power P1: 10.00 dBm

Output Power P2: 9.50 dBm

Secondary Path Elements

Isolated Port P3: -20.00 dBm

Coupled Power P4: 0.00 dBm

Related Tools

About this tool

Directional Coupler Calculator is a free online calculator tool. Use it to get instant, accurate results for your electronics calculations.