A GSM+GPS combo antenna integrates two essential wireless communication technologies into a single device, optimizing space and performance for applications like tracking, IoT, and telematics. 1. GSM Antenna Function Operates in cellular frequency bands (850/900/1800/1900 MHz for 2G/3G/4G). Enables data transmission & reception for communication with mobile networks. Uses linear polarization (vertical) for better signal propagation. 2. GPS Antenna Function Tunes to 1575.42 MHz (L1 band) for GPS (supports GLONASS, Galileo, BeiDou). Uses Right-Hand Circular Polarization (RHCP) to minimize signal loss from satellite reflections. Requires clear sky visibility for optimal performance. 3. Why a Combo Antenna? Reduces interference: Proper isolation prevents GSM signals from disrupting weak GPS signals. Saves space & cost: One antenna instead of two, simplifying installation. Screw-type design: Ensures a secure, vibration-resistant connection (ideal for vehicles).