Opt.003 Rectangular Waveguide Resonance Calculator

This dialog allows you to create a custom resonator targeted at a specific frequency.  Also allows user to choose correct modes to measure magnetic materials.

With Resonant Cavity Methods (Opt. 003) selected from the Measurement Launcher:

1. Select the ASTM 2520 Method.
2. Then click Calculate Fc.
3. The following dialog appears:

4. Specify the approximate frequency range (Start / Stop) of interest.
5. Select the units to be used for the dimensions.
6. Enter the Width, Height, and Length of the waveguide.
7. Press Calculate. P is the number of half wavelength resonant frequencies for a theoretical piece of waveguide with the specified dimensions.

• • High-energy (maximum) appears at ODD-order half-wavelength frequencies (p = 3 and 5 in the above example).
  • Low-energy (minimum) appears at EVEN-order half-wavelength frequencies (p=2 in the above example).

Use these settings in measurement - When checked, the connected VNA is setup using these frequencies when OK is pressed.