1. The problem statement, all variables and given/known data OK, so, a compounding of my knowledge so far. - A waveguide is a conduit for EM waves. - They can be parallel plate (infinite), circular, or as I'm looking at - rectangular. - Speed of propogation is limited by skin effect - the higher freq, the thinner the skin & so higher resistance . . . . . - they are classified in terms of mode (TE, TM, TEM) - the modes have different operating conditions (TE10, etc.) 2. Relevant equations Stupid questions I should know regarding TE mode; - do the EM waves travel through the media inside the guide(i.e. air) or do they travel in the wall of the guide? - in TE mode what do the figures in sbbscript indicate (m & n, I understand as in TEmn) - EM waves travel in, say, z-direction. Electric field (transverse, i.e. at 90degrees) to EM propogation, but magnitude of E is less at sides than centre. Why? Is this the infamous boundary conditions? B 1 ⊥ -B 2 ⊥ =0 Just basics, but I need clarification. Thanks.