Active ceramic antenna, can be used to receive right-hand circularly polarized satellite signals in GPS L1, BD2 B1, GLONASSL1 bands. The antenna adopts double-fed ceramic plus bridge, with good antenna axial ratio, good overlap between phase center and geometric center, suitable for high-precision positioning, and adopts pre-filter, good out-of-band suppression, and strong anti-interference ability. Application areas: shared bicycles, drones, locators, electronic dogs, acreage meters, rearview mirrors and other positioning equipment.