Looks like the low power circuit can fit in 10x15mm
I don’t believe this exists from any vendor, no. Yes, it will fit in a very small area, but you still need a decently sized antenna for good performance 
Looks like the low power circuit can fit in 10x15mm
I don’t believe this exists from any vendor, no. Yes, it will fit in a very small area, but you still need a decently sized antenna for good performance