Frequency-Dependent Rectangular TE 30 -to-TE 10 Mode Converter

Dielectric rod arrays in a metallic waveguide alter the propagation modes and group velocities of electromagnetic waves. We have focused on TE30-to-TE10 mode converters and investigated how their behavior varies with frequency. A mode converter is proposed that passes the TE10 mode at frequencies lower than 2ƒc, and converts the TE30 mode into the TE10 mode for frequencies higher than 3ƒc.