RF · Antenna · Microwave

WirelessTools

Engineering, simplified. Fast, accurate, browser-based calculators for the working RF engineer.

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50 Ω Z_L

Tool 01

Smith Chart Matching

Interactive Smith chart with automatic L-network impedance matching and visualized matching paths.

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w h εr t

Tool 02

Microstrip Impedance

Z₀ and εeff for microstrip lines using Hammerstad-Jensen with thickness correction.

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GND GND εr w

Tool 03

Stripline Impedance

Symmetric stripline Z₀ via the IPC-2141A formula with conductor-thickness correction.

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GND S GND GND s s w εr

Tool 04

Coplanar Waveguide

CPW and grounded CPW impedance using Wadell's elliptic-integral formulation.

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V_max = (1+|Γ|) V₀ V_min = (1−|Γ|) V₀ Z_L d

Tool 05

VSWR / Return Loss

Convert between VSWR, return loss, and reflection coefficient. Plus mismatch loss.

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TX P_TX · G_TX RX P_RX · G_RX d (free space)

Tool 06

Friis Link Budget

Free-space path loss, EIRP, received power, and link margin from the Friis equation.

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0 −20 −40 dB fc frequency → S₂₁ S₁₁

Tool 07

LC Filter Designer

Synthesize Butterworth and Chebyshev LC ladder filters — lowpass, highpass, bandpass, bandstop — with component values and live S₁₁/S₂₁ plot.

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Built by a working RF engineer.

WirelessTools.dev is a growing library of practical RF and antenna engineering calculators, built and maintained by a working wireless consulting engineer. If you have an RF challenge that needs solving — antenna integration, impedance matching, link budget, EMC — get in touch.

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