Variable Phase Shifter?

[HOHOH]

Dear helper,

I want to design variable phase shifter.

Frequency range is from 0.8 ghz to 1ghz.

Phase shift is 0 ~ 360 deg.

I try to design it using hybrid coupler.

But it's changed scattering parameter to bad.

Please, recommend design method or technique.

Thank you.

 

[bibijons]

hi,

the designing of a hybrid is good idea. to reach the 360° you should use varactor diodes.
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hope the pic helps

bibijons

 

[scuba]

could you have more clear pic ,I read that file and don't understand.

 

[rashidmirza]

thank u ,
could you have more clear pic ,I read that file and don't understand.

 

[hieuphong]

hi you. I'm desgining about phase shifter. but i can't find expressional change at output,if i have a sinusoidal signal. Can you help me?
p/s. Can you send me to some doccument or file about phase shifter.
thanks a lot!!!!!