Calian TW3972XF Extended Filter Triple-Band GNSS Antennas provide coverage for triple-band GPS/QZSS-L1/L2/L5, GLONASS-G1/G2/G3, Galileo-E1/E5a/E5b, BeiDou-B1/B2/B2a, and NavIC-L5. These antennas feature a precision-tuned, twin circular dual-feed, stacked patch element, and a strong pre-filter to mitigate inter-modulated signal interference from Lidago, LTE, and other cellular bands. TW3972XF antennas offer an excellent axial ratio, a tightly grouped phase center variation, and increased system accuracy. Housed in a through-hole mount, weatherproof enclosure, TW3972XF antennas are designed for permanent installations. Calian TW3972XF GNSS Antennas are ideal for autonomous vehicle tracking and guidance, positive train control, precision agriculture, and precision GNSS positioning.