Quectel QLM29H Series GNSS receiver

Quectel Wireless Solutions has launched the Quectel QLM29H range of dual-band, multi-constellation receivers. Designed for easy integration, the QLM29H combines the LC29H GNSS module and an integrated GNSS patch antenna to simplify RF design. It supports dual-band L1 and L5 signals, providing multipath mitigation, especially in challenging environments such as urban canyons, where high-precision positioning is critical.

The GNSS receivers help customers adapt or modernise existing designs by enabling them to access dual-band GNSS rather than only L1 signals, provided the legacy product has a simple UART interface. Additionally, the receiver provides customers with the flexibility to use GNSS as a plug-in option, enabling them to choose whether to integrate it based on their specific needs.

The QLM29H receivers support concurrent reception of global and regional GNSS constellations, such as GPS, GLONASS, Galileo, BDS and NavIC, as well as QZSS and SBAS. The internal LNA, diplexer and SAW filters enhance the receivers’ sensitivity and anti-interference capability. The positioning capability of the QLM29H makes it suitable for applications such as micromobility, precision agriculture, navigation, insurance telematics and tractor steering systems and enables easy upgrading of existing legacy L1 only systems that have a spare RS232 port without complete product re-design.

The device offers a range of features including dual frequency support, enhanced accuracy of 1 m in autonomous mode and centimetre-level precision in the real-time kinematic (RTK) positioning-capable variant. The dead reckoning (DR) function also helps to ensure the module’s superior positioning performance, even in weak signal areas or when GNSS signals are not available.

Quectel also offers GNSS modules and antennas, such as the QLM29H, as a pre-integrated package, although customers can buy module and antennas separately if they wish. This helps to accelerate time-to-market. The Quectel QLM29H is RoHS compliant, and has an operating temperature range of -40 to +85°C and dimensions of 72.0 x 57.6 x 22.3 mm.