0 votes 0 votes Consider an air filled rectangular waveguide with a cross-section of $5 \: cm \times 3 \: cm $. For this waveguide, the cut-off frequency (in MHz) of $TE_{21}$ mode is __________. Electromagnetics gate2014-ec-3 numerical-answers electromagnetics cut-off-frequency + – Milicevic3306 asked Mar 26, 2018 recategorized Nov 15, 2020 by soujanyareddy13 Milicevic3306 16.0k points 73 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.