Feature: 1. PCB adopts 1.6mm thick double-sided board, 2.0 oz copper thickness, and full tinning process to ensure good passing performance of large and small currents 2. Four‑arm helical antenna has a wide range of applications, including aerospace, meteorology, positioning, relay and many other fields 3. The current amplitudes of the feed ends of the four spiral arms are equal, and the phases are different by 90° in turn 4. With cardioid pattern, good front-to-back ratio and excellent wide-beam circular polarization characteristics 5. 1.6G four-arm helical antenna is very suitable for use as a receiving antenna for satellite positioning systems Specification: Item Type: Four‑Arm Helical Antenna Material: PCB Purpose: Used in fields such as sky, weather, positioning, relay antenna, etc. Antenna Impedance: 50Ω Working Frequency Band: 1.4 ~ 1.68GHz Antenna Connector: SMA (male). Package List: 1 x Four-Arm Helical Antenna Note: Do not use it outside the frequency and impedance range.