What is a space/spatail harmonic?

[shpongle]

What is a space/spatial harmonic?

Hi

I am doing a project on folded waveguides and I am reading some IEEE papers for literature review. I always come across this term "space harmonic" and fail to understand what it is. I have checked online but don't get it. Even posted in the Electrical Engineering section but didn't get any answers.


Could anyone explain/link me to an understandable definitation of space/spatial harmonic(s)

Thanks

 

[ZapperZ]

You should really include at least one clear citation to your sources.

Without seeing that, the only thing that I can come up with is that it is simply a short description of the spherical or cylindrical harmonics, depending on the geometry. These are the well-known solutions to a particular differential equations that are often used in E&M and QM, as well as in many other areas.

Zz.

 

[shpongle]

Thanks for quick reply, here is one of the papers where spatial harmonics are mentioned

Accurate parametric modeling of folded waveguide circuits for millimeter-wave traveling wave tubes by Booske, J.H
http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=1424348

Do you have access to IEEE papers?