The Tallysman AJ977XF Anti-Jamming Antenna is engineered to mitigate interference and jamming signals from near-ground transmitters, ensuring reliable GNSS performance in challenging environments. Its Low Elevation Angle Nulling Antenna (LEANA) design provides approximately 20 dB of wideband suppression for all GNSS signals received at elevation angles from 0° to 15°, effectively mitigating high-power jamming signals from nearby sources. Above 20° elevation, the antenna maintains excellent gain and a stable phase center, supporting accurate and precise positioning.

The AJ977XF combines Tallysman’s low elevation angle nulling radiation pattern with eXtended Filtering (XF) technology. XF provides deep filtering and high IP3 performance to prevent GNSS antenna saturation from strong out-of-band signals. This combination ensures robust protection against jamming and radio frequency interference while maintaining optimal GNSS signal reception.

Tallysman’s XF technology specifically mitigates interference from emerging signals such as Ligado (1525–1536 MHz), new LTE bands in Europe and Japan, and Inmarsat uplinks (1626.5–1660.5 MHz). By filtering these signals, the AJ977XF enables attached GNSS receivers to operate with maximum reliability and accuracy in both existing and evolving RF environments.