thanks very much kecbackbencher
should i build the 3d model of the SMA connector? I read a tutorial about a microstrip antenna feed and it showed a way: just draw a circlea and a cylinder set this circle as lumped port excitation and the cylincer as the copper pin, then it said it was a simple coaxial waveguide feed exciting.
So I built a box, set 4 faces boundary as copper, and draw a another rectangular overlap the bottom face of the box, then subtract a circle (also clone it)on the rectangular and set this circle as lumped port excitation.
Did I do correctly?
In addtion, I want to build a waveguide transistion as an antenna function, so I left one face of the box(waveguide) as vaccum and built a air box outside the waveguide. Am I right?
No need of making whole SMA connector, you are doing electromagnetic analysis of SMA connector, just make inner conductor of dia meter 1.3mm and out conductor diameter 4.1 mm with teflon in between.
insert it in the rectangular waveguide from the middle of broadside from Lambdag/4 distance from the short ( actual point is somewhat less than lambdag/4), the SMA connector pin is soldered with extra length with some steps and pin head at the end that behaves like a monopole antenna and convert the TEM mode of coax to TE mode of tectangular waveguide. this pin depth, position from short and the step radius are the tuning elements. By the way, which waveguide to coax trnasition you are going to design.
Could you please explain, how to design the wave guide, that is design only the vaccum portion, with finite conductivity assigned to five faces except the one which is feeds the waveguide (assigned as waveport).
How do I verify that the waveguide is tuned to the required frequency by looking at S11 parameter?
There are plenty of literature available about waveguides in hfss.You should probably look into this one.if in case you havent had a chance to look at it
hii kecbackbencher..
i want to model waveguide to waeguide transistion using coax..
first what i did is ..i modelled waveguide to coax transistion..im confused how to model coax that gets into waveguide..the e-field is not transfering into waveguide..i think the problem is with coax only..could u pls tell me how to model it..
thanks in advance