Modes diagram in a rectangular waveguide

a = mm b = mm εR =

Here are the first 9 modes, based on critical frequency:

Mode 1 TE(1,0) fc=7.5GHz View mode	Mode 2 TE(0,1) fc=15GHz View mode	Mode 3 TE(2,0) fc=15GHz View mode
Mode 4 TE(1,1) fc=16.771GHz View mode	Mode 5 TM(1,1) fc=16.771GHz View mode	Mode 6 TM(2,1) fc=21.213GHz View mode
Mode 7 TE(2,1) fc=21.213GHz View mode	Mode 8 TE(3,0) fc=22.5GHz View mode	Mode 9 TM(3,1) fc=27.042GHz View mode

Ⓒ Dr. ing. Adrian Iordachescu
This script was created in collaboration with my student, Ruxandra Chirita.