Product overview
The JND ST-D117D from Shenzhen JND Technology Co., Ltd is a professional-grade, high-precision GNSS antenna in an active internal configuration. It supports three frequencies across all GNSS systems, together with RTK/RTD. Its antenna architecture uses multiple feeds to provide circularly polarized signal reception and an excellent axial ratio. These reception characteristics underpin the design’s stated precision advantage over traditional dual-frequency GNSS antennas, combining triple-frequency coverage with a multi-feed approach to signal reception.
The RF architecture combines multistage filters with a low-noise amplifier to improve GNSS radio-frequency sensitivity and resistance to interference. The ST-D117D provides out-of-band interference rejection while maintaining stable high gain across its frequency band. Its active design therefore brings together amplification and filtering, alongside the antenna’s circular-polarization characteristics. High gain, good out-of-band suppression and circularly polarized reception are the principal reception features of this triple-frequency antenna, complemented by its support for RTK/RTD.
