filter 1090mhz

The nuhertz filter program can design these. You get a free period of use before it quits and you have to pay for a license to continue using it. http://www.nuhertz.com/filter/

Hi Flatulent ,
i know the nuhertz filter program and is good to simulate filter but i desire to see real design of duplex and think that bands 1030_1090 MHz
need microstrip filter

Their latest versions have duplex and triplex in transmission line and other physical structures.

first you have to make sure of your request,

and use microstrip,coxal?