RFID Module

Wireless & IoT
1

Hi Guys

I am New to this forum. I am using a RF ID Module to read the data from RFid Cards which is kept in a fiber box. Each card has got non uniform power. So some are weak with less power and some are powerful with more power. Now when i swipe these cards on RF-ID Reader module which is inside a fiber box 2 situations occur

  1. Strong Cards are read from outside the box and weak cards are read properly

  2. Strong Cards are read properly but weak cards are ignored

Now My question is how do i control this situation. In other words what should i do to make both strong and weak cards read properly. Is there any Electromagnetic protection that can be used to prevent this.