Feature: 1. PCB adopts 1.6mm thick double sided board, 2.0oz copper thickness, full tinning process can ensure good passing performance of large and small currents 2. Possess wide range of applications, can be used in 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. Come with cardioid pattern, good front to back ratio and excellent wide beam circular polarization characteristics, which is very suitable for use as a receiving antenna for satellite positioning systems 5. The antenna connector adopts SMA male, the impedance is 50 ohms, and the working frequency band is 1.4 ~ 1.68GHz Specification: Item Type: Helical Antenna Material: PCB Purpose: Used in fields such as aerospace, meteorology, positioning, relay antenna, etc. Antenna Impedance: 50 ohms Working Frequency Band: 1.4 ~ 1.68GHz Antenna Connector: SMA male. Package List: 1 x Circuit Board1 x Aluminum Wire1 x Connector Note: Do not use outside the frequency and impedance range.