The ACAR0301-SG3 is a multiband GNSS/GPS/GLONASS/BEIDOU SMD chip antenna designed for compact satellite navigation applications. It operates across the frequency range of 1561–1610 MHz with a typical bandwidth of 49 MHz, impedance of 50O, and VSWR of =2.0, ensuring efficient signal reception across multiple satellite systems. The antenna features linear polarization and delivers peak gains ranging from 1.69 dBi at 1561 MHz to 1.43 dBi at 1602 MHz, with measured efficiencies between 63.27% and 70.06% across the operating band. With dimensions of 3.05 × 1.6 × 0.55 mm and RoHS/RoHS II compliance, this antenna is ideal for tracking, geolocation, IoT sensors, and wearable devices requiring reliable GNSS positioning in space-constrained designs.