The Advantenna-CP11 is a compact RFID UHF Antenna, with a highly controlled reading area, and with circular polarization. By controlling the power of the RFID reader, the Advantenna-CP11 can work as a near-field antenna, or as a wider range antenna. When working as a near-field antenna, the reading area can be adjusted to be a few centimeters, even with far-field tags. Advantenna–CP11 can be mounted under the surface of a shelf, table, etc. in order to create RFID applications such as payment systems, check-in systems, access control, smart shelves, smart displays, smart panels and smart tables.