Directional Coupler Design

[zir_green]

directional coupler design

hi everybody i am new
found this forum , and i am happy that i have found it

currently i am doing my graduation project
with the use of labview , a signal generator and a scope i made a procedure where it
founds i the frequency response of the DUT/UUT currently cable
now i finished it work quite well

now i have to convert this system to a Network Analyzer where i need to make probably 2 directional couplers
to seperate V1+ V1- V2+ V2-
the connectorsof the coupler will be BNC
for the frequency range 250kHz - 1GHz
i i will plot the s parameters

we have a SMT machine where i can use it to produce my directional couplers (probably microstrip ) in PCB
but i dont know how to make the couplers

does anyone have a knowledge how to start this
or a way o doing this
do i need a software?

thx

 

[VSWR]

coupler design

**broken link removed**

 

[zir_green]

design a directional coupler

ok its a heplfull URL
where the theory of this couplers are written

it would be nice write some more
haven seen any tools for designing a coupler