wideband septum/post waveguide power divider problem

[yefj]

Hello,I have succseeded creating an H-plane power divider by connecting two waveguides and using a single septum or a post in the junction.
But its very narrow band.
is there some way to increase the Bandwidth ?

I know it has something to do with a multisection,but how exactly to implement it in my case.
I'll be glad to have an article or sumthing?
Thanks.

 

[biff44]

not sure i can explain why this happens, but if you go into the junction with three quarterwave transformers, and lower the wave impedance when you hit the junciton....and then use two sets of three quarterwave transformers going out the two splitter outputs, you will find the bandwidth is magically bigger

Microwave high power SP2T switches are made this way too in microstrip,