APAE915R2540ABDB1-T is a 915 MHz RFID patch antenna designed for USA band RFID systems in compact 25 × 25 × 4 mm dimensions. The antenna operates at a nominal frequency of 915.0 MHz with a center frequency at -10 dB bandwidth of 927.5±3.0 MHz and features right-hand circular polarization (RHCP) for optimal signal reception. It exhibits an impedance of 50 O with real and imaginary parts of 30±15 O and -5±15 O respectively at center frequency, and maintains a frequency temperature coefficient of 20 ppm/°C for stable performance across temperature variations. The antenna is RoHS/RoHS II compliant and ideal for RFID systems in logistics, inventory management, retail, pharmaceutical, and automotive industries, as well as industrial automation and contactless smart card applications.