Hi, 

I wander if someone can clear the confusion I have around the cc2591 RF PA interface.

The cc2591 input complex impedance is 105 + j36.
In cc2591 data sheet. The information inside is simple impassable. Cc2591 connected directly to two deferment CPUs, cc2500 and cc2430 which has deferment complex impedance output without any complex impedance matching components between ...

The cc2500 connected directly to cc2591. It has output 80 + j74
The cc2430 connected directly to cc2591. It has output 60 + j164 
Directly means , only 1.5 micro strip wires, no coil or capacitors. 

How two components which has so deferent RF output can connect directly to cc2591. 
Maybe because cc2591 has balun inside, and that can automatically matched every thing... 
Is so why cc2530 (69 + j29) has matching network toward cc2591, (more capacitors)
and cc2520 (70 + j96) also has it ? (more coils) 

I need to connect cc2591 to b c 4 (34 + j 72) ... so, to connect that with matching network? if with, as cc2530, or direct as cc2500 ? 

cc2500 80 + j 74 Direct connection
cc2430 60 + j 164 Direct connection 
cc2530 69 + j 29 with T LC netwrok
cc2520 70 + j 96 with T LC network. 
B C 4 34 + j 72 

I read on Murata web page about balun LDB182G4520C-110 (50 to 200 ohm) that it can mach everything from 10ohm to 200 ohm. That amazing, maybe every balun can do that? 

Thank you for any help. 
-Nissim@vitelix.com