Dielectric loaded tm₀₁ to te₁₁ mode converter for S-band applications

Compact circular waveguide TM 02 ‐TE 11 mode converter

“…From Fig. 12b, one can learn that the output mode is of the good Cir.TE 11 mode type [14], which confirms that the Cir.TM 02 mode is successfully converted into Cir.TE 11 mode.…”

“…Over-moded RBWOs operating at higher order Cir.TM 02 mode require circular waveguide mode converters which convert the output Cir.TM 02 mode into more useful TE 11 circular waveguide (Cir.TE 11 ) mode, since it has a radiation pattern similar to 'Gaussian shape' of a hybrid HE 11 mode and converged beam with maxima at the centre [11]. Conventional circular waveguide TM 02 -TE 11 mode conversion chain uses waveguides with periodic wall perturbations TM 02 -TM 01 mode converter [7], and then adopts dual bent circular waveguides structure [10,12], cross shaped circular waveguides structure [13], and dielectric [14], metallic photonic crystal [15], multiple metallic plates [16] or metallic baffle [17,18] loaded circular waveguides structure, which finally convert Cir.TM 01 intermediate mode into Cir.TE 11 mode. Unfortunately, this TM 02 -TE 11 mode conversion chain is not very tight because of combining two kinds of waveguide mode converters, and expensive to manufacture in high frequency bands.…”

Circular sectoral waveguide TM01 to TE11 mode converter

“…The tapered metallic baffle mode converter is a lightweight structure but having low return loss . Dielectrically loaded mode converter has been reported with high conversion efficiency . But such mode converter contains heavyweight dielectric and is more sensitive at high temperature, which leads to thermal expansion or deformation of dielectric.…”

Mode‐matching analysis for characterization of the sectoral waveguide mode converters

“…[2][3][4] SWG mode converter loaded with dielectric and metallic photonic crystals capable of conversion from TM 01 mode to TE 11 mode has been reported. [5][6][7] But these mode converters have a low capability to sustain at high power microwave in comparison to all metal-mode converters. Also by using shorted inner conductor end, mode conversion of TM 01 mode to TE 11 mode is achieved but their conversion efficiency is lower in comparison to SWG mode converter.…”

“…The mode conversion has achieved through the length of the SWG region having two different sectoral angles . SWG mode converter loaded with dielectric and metallic photonic crystals capable of conversion from TM 01 mode to TE 11 mode has been reported . But these mode converters have a low capability to sustain at high power microwave in comparison to all metal‐mode converters.…”