Millimeter-wave, Consulting & Design

General & Waveguide Calculator – VSWR, Cutoff, Attenuation, Coax & WG Design

Compute waveguide & coax parameters: VSWR, cutoff frequency, attenuation, phase, power loss, waveguide size (rectangular/circular) for RF & microwave design.


The General & Waveguide Calculator provides fast, accurate computations for coaxial and waveguide transmission line parameters. Engineers and researchers can instantly calculate cutoff frequency, VSWR, attenuation, phase velocity, power handling, and loss for both rectangular and circular waveguides.

This tool includes:

  • Rectangular & Circular Waveguide Dimensions – compute cutoff frequencies and propagation modes.

  • Coaxial Line Calculations – impedance, capacitance, inductance, and attenuation.

  • Loss & Power Analysis – conductor and dielectric attenuation, skin depth, and power handling.

  • VSWR & Reflection – evaluate return loss and system efficiency.

Designed for RF, microwave, and millimeter-wave engineers, this calculator serves as both a reference and initial design guide for antenna feeds, radar front-ends, satellite links, and lab measurement setups.

VSWR RL(dB) Mismatch Loss(dB)
dBm Watt
°C °F °K
Skin Depth
Conductivity x 107 S/m Freq (GHz) um uin x5 uin
Coax
a b Er Zo Cutoff (GHz)
Coax

Rectangular WG, Air Cutoff Frequency for Modes Wavelengths
Freq (GHz) Er a (inch) b (inch) TE10 Cut (GHz) TE20 Cut (GHz) TE01 Cut (GHz) Λ0 (mil) Λ0/4 (mil) Λg (mil) Λg/4 (mil)

TE10 Phase TE10
Length (mil) Phase (deg) 1Breakdown (KW)
Circular WG, Air
Freq (GHz) WG Dia (inch) Modes TE11 TM01 TE21 TE01 TE31
Cutoff (GHz)
Λg (mil)
Pmaxpic


Attenuation (air) /(in inches)
Rectangular WG Circular WG Material Conductivity ( x 107 S/m)
a (inch) b (inch) Diameter (inch) Start Freq (GHz) Stop Freq (GHz)