Wireless Technology
Figure 3: The Sona TI351 453- 00200R is a compact 12 x 12 mm module in an M.2 1216 SMT form factor with an integrated chip antenna. (Image source: Ezurio)
Figure 4: The Sona TI351 453- 00199R module features an MHF4L antenna connector. (Image source: Ezurio)
Figure 5: The Sona TI351 453- 00209 module uses an M.2 2230 Key E connector for pluggable system configurations. (Image source: Ezurio)
Figure 2: The Sona TI351 comes with a comprehensive connectivity software stack. (Image source: Ezurio)
of establishing continuous connections, which is particularly useful in building automation systems transmitting environmental data or access credentials. Additionally, the BLE Generic Attribute Profile (GATT) Security Levels Characteristic allows different security levels for various data types, optimising the balance between security overhead and performance. Regulatory compliance can be a significant headache, regardless of which protocol designers choose, especially for devices shipping internationally. To address these concerns, the Sona TI351 family is certified to standards that include FCC (US), IC (Canada), CE (Europe), UKCA (UK), MIC (Japan), RCM (Australia/New Zealand), and KCC (South Korea).
SMT and M.2 options provide
As noted earlier, the Ezurio Sona TI351 family is available in several configurations to meet specific application requirements. For example, the 453-00200R (Figure 3) uses the compact 12 x 16 millimetre (mm) M.2 1216 SMT form factor with an integrated chip antenna. This design enables automated assembly while providing a ruggedized connection that can withstand industrial environments. This combination of features makes the module particularly well-suited for high-volume deployments where reliability and manufacturing efficiency are critical. For applications requiring external antenna connectivity, the 453-00199R (Figure 4) has the same ruggedized M.2 1216 form factor but offers an MHF4L connector instead of a chip
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antenna. This configuration enables the use of external antennas for optimal signal reception in challenging RF environments, such as metal enclosures or areas with high EMI. Unlike the two previous examples, the 453- 00209 (Figure 5) uses an M.2 2230 Key E connector for pluggable system configurations. This feature enables easy field installation and replacement, making it particularly useful for equipment monitoring applications where minimising system downtime during maintenance is crucial.
This range of options allows system designers to optimise their implementations for specific use cases while maintaining reliability and ease of integration.
RF design
For modules equipped with the MHF4L connector, Ezurio offers a range of pre- certified antenna options. One example is the EFB2471A3S-10MH4L 5 W flexible Planar Inverted-F Antenna (FlexPIFA) (Figure 6) with adhesive backing for ease of integration. This triple-band (2.4/5/6 GHz, with support for 7.125 GHz) antenna maintains a low average voltage standing wave ratio (VSWR) of 1.6:1 at 5.925 to 7.125 GHz. It has a gain of 3.9 decibels relative to isotropic (dBi) at 5 GHz and is particularly well-suited for global applications where performance across different frequency bands is essential. For stationary Industrial IoT (IIoT) and equipment monitoring applications, the 001-0021 (Figure 7) offers a dual-band 2.4/5 GHz solution. It has a VSWR of <2.5:1
Figure 8: The Sona TI351 development kit is based on a 453-00200 chip antenna module and provides communications and hardware interfaces to a Linux host. (Image source: Ezurio)
at 2.4 GHz and a gain of 3 dBi at 5 GHz. The lineup of pre-certified antennas can meaningfully streamline product development. Ezurio has already tested the antennas for use with the modules, reducing the risk of unexpected RF performance issues. More broadly, the combination of module form factors and antenna choices allows system designers to optimise their implementations while maintaining ease of integration.
Figure 7: The 001-0021 is a dual-band 2.4/5 GHz antenna.
(Image source: Ezurio)
Development kit provides full access Designers can use the 453-00200- K1 development kit (Figure 8) to get a quick start with the modules. This comprehensive kit uses a 453-00200 chip antenna module and features multiple software and hardware interfaces to a Linux host for testing module functionality and performance.
The kit includes high and low-speed cables and adapter/daughterboards that connect to UART or high-speed SDIO devices. On-board headers, jumpers, and switches make it easy to separate power and signal nets for testing and measuring power consumption during hardware and software development.
Conclusion
Figure 6: The EFB2471A3S- 10MH4L is a triple-band 2.4/5/6 GHz, 5 W antenna. (Image source: Ezurio)
The Sona TI351 modules address key wireless connectivity challenges in industrial environments by packaging advanced wireless capabilities into a compact, rugged design. The pre-certification of both modules and antennas, multiple mounting options and form factors, and a comprehensive development kit minimize development time and risk.
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