Designing PCBs for wireless modules can be interesting. If a process computer or single-board computer needs to be equipped with a wireless module, using a PCIe card yields advantages. With the RM520, Quectel provides a card based on cutting-edge modem intellectual property.

The PCIe expansion port - the figure below shows one on an Orange Pi 5 Plus - has an advantage over classic USB sticks. Most importantly, modules can be secured to the process computer using screws; furthermore, the low impedance ensures that low-quality USB cables cause no power supply problems.

While most Quectel modules come with a PCIe interface, getting a readily certified card greatly accelerates design bring-up. Furthermore, QuecTel’s highly experienced RF engineers ensure that the printed circuit board's RF design is first-class, thereby ensuring the highest 5G radio capability.

A Vast Array of Certifications for Wide Carrier Support

Adapting embedded systems to various international networking regimes can be an interesting task. With the RM520NGLAA-M20-SGASA, Quectel provides a wireless module that supports almost all international carriers. In particular, it supports a wide array of bands used for various 5G and 4G technologies, with UMTS fallback also available. In particular, the bands are shown in the figure.

International deployment of 5G products is aided by a wide array of carrier and regulatory certifications—one particularly interesting aspect is that the RM520NGLAA-M20-SGASA is fully certified on Verizon.

Finally, the 5G PCIe module boasts an impressive industrial temperature range. It can be used in temperatures ranging from -40° to +85°C, ensuring it works well in out-of-turbine automotive applications.

Driver Support and Excellent Field Engineers

Bringing wireless modules up can require software. In the case of the RM520NGLAA-M20-SGASA, Quectel provides a turnkey experience with drivers for Android, Linux, and Windows in all currently supported versions. This means that bringing the module up is, in most cases, as simple as plugging it in and compiling a kernel module.

Furthermore, the field engineering services deserve a recommendation. When working on a product, the team provides a vast array of resources, including design reviews, ensuring that the wireless module design will be finished quickly and successfully.

Conclusion

With the RM520NGLAA-M20-SGASA, Quectel provides an easy-to-use module for single-board computers, process computers, and similar applications. Thanks to the industry-standard PCIe format, mechanical and electrical adaptation are a non-issue. The module can be comfortably integrated into all commonly used embedded operating systems. In short, a simple yet high-performing way to add wireless connectivity to any kind of design at hand.