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14GHz directional coupler

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amicloud

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handle 1W power,20 dB coupled.how to make?how to avoid high frequency effects?
 

amicloud said:
handle 1W power,20 dB coupled.how to make?how to avoid high frequency effects?

Very poor specs! What about bandwidth, directivity? What do you mean by "frequency effects"?

Very good specs you can get by using waveguide structure.
Look at the Pozar's("Microwave engineering") and Matthaei's("Microwave filters, impedance-matching networks...") books. These books are the best for such problems.
 

amicloud said:
handle 1W power,20 dB coupled.how to make?how to avoid high frequency effects?

use slot line with about 15 dB coupling and 5 dB att ( to improve the directivity)
 

Stripline directional coupler is good for your spec.
 

Do you need your coupler in waveguide?
 

XuQing said:
Stripline directional coupler is good for your spec.
stripline have more loss then microstrip, so i suggest overlay coupler
 

stripline have more loss then microstrip, so i suggest overlay coupler

That's right , but is tolerable for general case.
 

you can use lang coupler with fr4 microssrip line or wilkinson coupler.
for more information to design this coupler you can:
1- search throgh the google
2- download book "RF circuit design by:ludwic"
 

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