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External 90 degree hybrid coupler

Question asked by kkADI on Apr 3, 2018
Latest reply on Apr 11, 2018 by mthahira

In product datasheet HMC6147ALC5, it's mentioned that external 90 degree hybrid coupler is needed to select required sideband. So how i should connect this external 90 degree hybrid coupler to IF1 & IF2 if I wish to have lower sideband signal (RF-LO) only?

 

Similarly for HMC6786ALC5A, how i should connect this external 90 degree hybrid coupler to IF1 & IF2 if I wish to have upper sideband signal (IF + LO) only?  

 

Any application note to share above concept why it's possible to suppress undesired sideband with external 90 hybrid coupler?

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