Abstract
The increasing interest in using the Near Field Communications (NFC) technology [1] at 13.5MHz is growing rapidly in the area of contactless payments, as well as numerous other applications, between devices that are within 10cm distance apart. However, there is growing concern that the use of such devices for contactless payments invites problems with regards to using metallic objects in the vicinity of the two devices to act as “rogue” antennas and eavesdrop information whilst a financial transaction is taking place. This paper will present aspects of designing H-antennas both for the two devices while also identifying the means by which rogue antennas can be designed from real life metallic structures such as a trolley.