Right now, I am using a differential amplifier with current mirror.
Where Q1 and Q2 are 2N3904, and Q3 and Q4 are 2N3906.
In parallel with the input lines, I have a capacitor to tune the frecuency to 5MHz according to the antenna loop size (uH), and the loop too.
I have no found any content -...
Thanks for your help @anorlunda
It is quite similar to active-rfid/beacon (according to the blog description)
Until now, the info transmission and a basic design is working. I was just looking for a way to increase the range of the beacon/receiver max. separation.
As the PIC is the one...
Thanks for your help @berkeman :biggrin:
The project is a transponder - where the transponder (the coil element) send it's ID number, and the ground loop detects when has crossed the antenna.
Right now the max height that the transponder can be detected is around 60cm - but I'm a bit stuck...
Hello all,
I'm playing around with a PIC + LCC Tank to send - at a 5MHz frecuency - some numeric data via BPSK. The receiver is a loop antenna placed in the ground.
The sender antena (L) is a ferrite core solenoid (N=10). As having a larger core, or increasing the Number of coils around the...