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Calculators / Science / Rectangular waveguide cutoff
Rectangular waveguide cutoff calculator
Estimate dominant-mode cutoff and guide wavelength for a rectangular waveguide.
On this page
TE10 cutoff frequency6.56GHz
Guide wavelength0.04m
Calculator controls
How to calculate
Estimate dominant-mode cutoff and guide wavelength for a rectangular waveguide.
TE10 cutoff frequency =
c/(2*a/1000)/1e9 GHzGuide wavelength =
c/(f*1e9*sqrt(1-(c/(2*a/1000)/(f*1e9))^2)) mWorked example
- Broad internal dimension (mm): 22.86
- Wave speed in filling medium (m/s): 299792458
- Operating frequency (GHz): 10
- TE10 cutoff frequency: 6.56 GHz
- Guide wavelength: 0.04 m
Assumptions and limits
This is an ideal educational model. Enter quantities in the stated SI units; it does not certify equipment safety or real operating limits. Assumes ideal conducting walls and a homogeneous filling medium; other-mode limits and attenuation are not calculated.
Results are rounded for display; calculations use unrounded values. Read our calculation methodology.
Understanding the result
Estimate dominant-mode cutoff and guide wavelength for a rectangular waveguide. Operation must be above TE10 cutoff. This does not establish single-mode bandwidth or a compliant RF design.
When this tool is useful
Operation must be above TE10 cutoff. This does not establish single-mode bandwidth or a compliant RF design.
Understanding your inputs
| Input | Example |
|---|---|
Broad internal dimension (mm) a | 22.86 |
Wave speed in filling medium (m/s) c | 299792458 |
Operating frequency (GHz) f | 10 |
Frequently asked questions
Which assumptions matter for this result?
This is an ideal educational model. Enter quantities in the stated SI units; it does not certify equipment safety or real operating limits. Assumes ideal conducting walls and a homogeneous filling medium; other-mode limits and attenuation are not calculated.
How can I check the worked example?
Use the displayed example inputs in the stated formula. Keep each quantity in its labelled unit and compare the unrounded result before applying display rounding.