Firstly, I'm not from electronics background so my knowledge is limited in this area.
Target System - I am looking to build/ extend the range of 125khz RFID reader upto 1 meter (~ 3ft) to be captured while walking through a gate detector (kind of like two pillar antenna in pic below).
Reason: Commercial gate readers are way too costlier to implement so am looking to build my own.
Current State - The below current 10x10cm loop antenna provides me a range upto (~1 ft).
Question: How do i design an Antenna in such a way it has a read range of 5 - 6 feet (throughout the height of pillar) and having read distance up to 3 feet (distance where the tag is presented)? Here the read range is as important as the read distance.
- Going for a RF Gate Antenna (the ones you find in clothing store) and plug & play with RFID reader?
- Increasing the size/ length of the antenna coil but maintaining the same inductance.
- Adding multiple small antennas (like an Array) across the length of the pillar.
- Making a dual loop antenna to cover the broader range.
Any help would be appreciated towards moving from my current state to target? I prefer to stick with 125 Khz LF frequency range.