Quectel Wireless Solutions, a leading global provider of IoT solutions, has announced the launch of its new QLM29H series of dual-band, multi-constellation GNSS receivers. These receivers, which combine Quectel’s LC29H GNSS module with an integrated patch antenna, are designed to provide high-precision positioning while simplifying radio frequency (RF) design for manufacturers and integrators.
The QLM29H series is equipped to receive signals from both L1 and L5 frequency bands, which enhances its ability to mitigate multipath interference. This is particularly important in challenging environments, such as urban areas where tall buildings can obstruct satellite signals, and precise location data is critical.
Norbert Muhrer, President and Chief Sales Officer at Quectel Wireless Solutions, highlighted the versatility of the new receivers. “The Quectel QLM29H range of receivers supports use cases from micromobility to agriculture, offering precise positioning capability,” he said. Muhrer explained that the QLM29H is designed to help customers upgrade or modernise their existing products by enabling access to dual-band GNSS. In particular, legacy systems that currently rely on L1 signals alone can now take advantage of the additional L5 signal without the need for a full redesign. As long as the older product includes a basic UART interface, the new receiver can be integrated with ease.
The QLM29H supports concurrent reception from global and regional GNSS constellations, including GPS, GLONASS, Galileo, BDS, and NavIC, along with QZSS and SBAS. With its internal low-noise amplifier (LNA), diplexer, and surface acoustic wave (SAW) filters, the receiver offers enhanced sensitivity and strong resistance to signal interference. Its precision positioning capabilities make it particularly suitable for applications such as micromobility, precision agriculture, navigation, insurance telematics, and tractor steering systems.
One of the standout features of the QLM29H is its ability to upgrade existing legacy systems that only use L1 signals, provided they have an available RS232 port. The integration process is straightforward and requires no significant redesign of the original product.
The receiver is designed to accelerate time-to-market for manufacturers and offers impressive precision, with accuracy as fine as 1 metre in autonomous mode and centimetre-level precision in versions that support real-time kinematic (RTK) positioning. The module’s dead reckoning (DR) feature ensures reliable positioning performance, even in areas with weak signal reception or no available GNSS signals.
The QLM29H also offers a cost-effective alternative to ruggedised tablets with integrated GNSS capabilities, often sold with proprietary software. By using a simple four-wire interface, the QLM29H allows customers to connect standard off-the-shelf tablets with open-source software, enabling GNSS support without the need for expensive, specialised hardware.
To simplify product design, Quectel offers the QLM29H GNSS receiver and antenna as a pre-integrated package, although customers have the option to purchase the module and antenna separately. This flexibility helps manufacturers speed up their development process and ensures optimal performance for their solutions.
The QLM29H is compliant with the Restriction of Hazardous Substances (RoHS) directive and operates within a temperature range of -40 °C to +85 °C. It is compact in size, measuring 72.0mm by 57.6mm by 22.3mm. For more information, please visit: www.quectel.com
