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How to change substrate material in a power divider without changing its performance?

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nasimi

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Hi
I designed a gysel power divider (similar to wilkinson) at 12 GHz and its performance is good. But its size is too small for my goal. I want to use a substrate with lower permittivity in order to increase the divider's size. But I don't want its center frequency and other configurations change.

Can anybody help me?
 

I want to use a substrate with lower permittivity in order to increase the divider's size
I've never come across a case where a component was "too small" before... why do you want to increase it's size? Obviously changing the host medium will require a redesign.
 

Actually I used frequency scaling in order to get a Gysel PD working at 12 GHz (and I didn't design it completely). The overall size is less than 15 mm, so I can't use SMA connector at the output ports. If I use a material with lower permittivity, I can increase the width and length of microstrip lines.
 

maybe you can extend the i/o ports so the sma can lie on it.
 

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