[SOLVED] Please help me find this RF transformer

[nrd_au]

Hi all,

I have this RF transformer at the front end of a VHF transceiver. It looks like it splits the RX and TX signals into two ports and a bandpass filter filters out the unwanted frequency. Any idea as to what this transformer might be? I have attached some images for your reference.

Thanks!

Reversed schematic


Top view


left view


Right view

 

[BigBoss]

I think this is a special designed coupler and they used for a particular purpose.
It supplies matching and coupling functions simultaneously. You have to refer to IC manufacturer.

 

[nrd_au]

Thank you for the reply BigBoss!

Leaving this here so it might help someone.

So I think I've found what it is. It is an RF power divider. Even though this is a 50ohm system the designer seems to be using a 75ohm component like this MAPD-011035 device (I checked again and the resistor in all the other boards was 150 ohm instead of 124ohm. might have been a mistake in assembly).



For my design, I will use TCP-2-10X+ by Mini-Circuits which is a propper 50 ohm part.

Thanks!

 

[BigBoss]

Try it but it may need some tuning to obtain optimized performance.