need help to a 1:6 transformer

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Boowei

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1/6 transformer

I want to design a high power(200w CW) directional coupler as following circuit,It work over the range from (30~80)MHz.

I am going to use a 3:5 voltage ratio transmission-line transformer as a 1:3 impedance ratio transformer.

However I don't know how to design 1:6 impedance ratio transformer,who can help me?
Thanks.
 

1:6 transformer

See attachment below.
 

You can use a 5/2 four delay line transformer similar to your 5/3 transformer.
 

Thank VSWR,FVM.
I hope to read the book Transmission Line Transformers,May you email the ebook to me? my email is liok802000@yahoo.com.cn
Thank.

Added after 29 seconds:

Thank VSWR,FVM.
I hope to read the book Transmission Line Transformers,May you email the ebook to me? my email is liok802000@yahoo.com.cn
Thank.
 

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