Est. Budget: $100.00
I am in the process of building an RFID entry system for my car & house. I will be using this tag: http://www.indiegogo.com/projects/the-xnt-implantable-nfc-chip
I have the entry system working with an arduino and this RFID reader: http://imall.iteadstudio.com/prototyping/basic-module/im130625002.html
However, the read range is very poor and requires the tag to touch the antenna. I need a design for an antenna which I can build and then solder onto the reader ...