The HD7-915 (RFID, Circularly Polarized) is an extremely rugged RFID antenna. It can withstand harsh conditions.
This series is the most rugged RFID Reader Antenna designed to date. In addition, it has surpassed every test thrown at them, including being run over by a car.
The HD7 Series antennas are all are Circularly Polarized.
HD7-915 US models are RHCP (Right Hand Circularly Polarized) and
HD7-868 European models are LHCP (Left hand Circularly Polarized).
The orientation of the RFID tag will not affect the performance of readers because the antenna is circular polarized. With 7 dBic gain, these antennas provide significant performance improvements over a micro-sized patch.