Quectel QLM29H series GNSS receiver

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

The 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 device’s high-precision positioning capability 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 redesign.

Designed to accelerate time to market, the product offers 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 helps to enhance the module’s positioning performance, even in weak signal areas or when GNSS signals are not available.

Flexible integrations, coupled with radically simplified customer RF design, make the GNSS receiver appealing to use cases such as tractor steering systems and mining. It also provides an alternative to expensive ruggedised tablets which were sold to customers with proprietary software and GNSS fully integrated. The receiver can, via a simple four wire interface, enable off-the-shelf, standard tablets with open-source software to support GNSS.

The product is RoHS compliant, with an operating temperature range of -40 to +85°C and dimensions of 72 x 57.6 x 22.3 mm.