APAKN0904-S1575-T is a compact GPS patch antenna designed for GNSS and IoT applications requiring reliable satellite signal reception. The antenna features a 9.0 x 9.0 mm ceramic patch element with right-hand circular polarization (RHCP) and operates at a nominal frequency of 1575.42±1.023 MHz with a return loss of -10 dB maximum. It delivers a peak gain of 0.5 dBi with 50 O impedance and maintains low VSWR characteristics, ensuring efficient signal coupling to receiver circuits. The antenna is housed in a compact 9.0 x 9.0 x 4.0 mm form factor and is RoHS/RoHS II compliant with MSL-1 moisture sensitivity level, making it suitable for remote monitoring, IoT devices, and GNSS receivers where space constraints and reliable positioning are critical.