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Need support on TX RF path length matching

Category: Hardware
Product Number: ADRV9029

Hello all,

I am currently working on designing custom board for ADRV9029. Our RF port (TX1, TX2, TX3 and TX4) connector position are fixed and are in a same horizontal line.

Due to this, TX1 and TX4 RF path length will be of same length and
                   TX2 and TX3 RF path length will be same.

As all TX paths should radiate same power level, hence please suggest any guidelines for RF path length matching. 

Where should we place Balun ? 

Length matching should be done for differential lines ( before Balun) or for RF path ?