Isosceles right triangular waveguides

The expressions of the transverse electric (TE) and transverse magnetic (TM) modes of the isosceles right triangular waveguides with unusual boundary conditions are discussed in this paper. Based on the initial solution formed using a finite sum of rectangular harmonics, boundary conditions are discussed, and TE and TM mode expressions are presented in this paper for the isosceles right triangular waveguides with all the possible boundary conditions. Transverse modal field distributions are given for the different isosceles right triangular waveguides.