Why do you need 400 mA?
Here's to transmitting the signal.
https://eu.mouser.com/ProductDetail/Wurth-Elektronik/74930000?qs=xZ/P%2Ba9zWqYWK9cm4pFG3w==&_gl=1*yts33s*_ga*MTAwMDQyNDQwMC4xNzAyNzgyNDU5*_ga_15W4STQT4T*MTcwMj c4MjQ1OS4xLjAuMTcwMjc4MjQ1OS42MC4wLjA.
There are many other transformers

 

Hey
How did you find winding_RC label in lt-spice? I didn't find

Apparently you are looking for a black cat in a dark room and it is not there.
LTspice doesn't have my transformer components. In order to use them you need to correctly attach my library.

 

Apparently you are looking for a black cat in a dark room and it is not there.
LTspice doesn't have my transformer components. In order to use them you need to correctly attach my library.

How did you create the library?

 

So we have a 30 kHZ signal transferring data via some sort of FSK modulation, which is an area that I have not visited
I am guessing that it is a wired system, not wireless, and that somehow individual sensors are powered via the data connection cable.
If his is a medical school project it would be rather interesting, but if it is an engineering school project I suggest a review of technology from a few years back, as the current trend is much more digital.

 

How did you create the library?

I have used every source available to me.
Internet, models of other Spice simulators, LTspice group.
I also created some models myself. In particular, transformers, avalanche transistors, DIAC, arresters and others. Many models have been adapted to LTspice.