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Recently, STMicroelectronics has released a series of antenna matching chips that are compatible with the wireless microcontroller (MCU)STM32WL33 to simplify the development of iot, smart metering, and remote monitoring applications.

The new series of products, MLPF-WL-01D3/02D3/04D3IC, adopts STMicroelectronics' proprietary Integrated Passive Device (IPD) technology, integrating two functions of impedance matching and harmonic filtering on a glass substrate, which can optimize the performance of the main RF transceiver. These highly integrated devices are precisely designed and packaged in a very compact size to ensure a one-time design success while saving development time, material costs and circuit board space.

The new device integrates antenna protection function, significantly simplifying the RF connection of the MCU. In addition to ensuring the best RF performance, the matched filtering two-in-one solution replaces multiple discrete components, enhancing the reliability of the application and reducing the overall cost.

The new series has launched a total of seven products. Designers can select suitable products for high-frequency band (826-958 MHZ) or low-frequency band (413-479 MHZ), high-power (16dBm/20dBm) or low-power (10dBm) RF services, as well as four-layer or two-layer PCB board design applications to optimize performance. The non-conductive glass substrate ensures excellent RF performance, minimal temperature drift, and a compact chip-level package size. After reflow soldering, the size is only 1.47mm x 1.87mm and the height is only 630µm.

The communication frequency band of the long-range Sub-GHz RF transceiver of the STMicroelectronics STM32WL33 wireless MCU is the unlicensed frequency band of 413-479 MHZ or 826-958 MHZ. Where permitted by local regulations, the maximum output power can reach 20dBm. These highly integrated wireless MCUS are equipped with the Arm® Cortex®-M0+ core and integrate some peripherals on the chip, which can simplify the design of remote monitoring devices for smart cities, smart agriculture and smart industry. The target applications include smart metering, security systems, asset trackers and proximity detection. Furthermore, the pre-certified and tuned STM32WL33 MCU RF reference design (STDES-WL3xxxx) is now available on the market.

The MLPF-WL-0xD3 antenna matching device adopts a 5-bump CSPG chip-level package and has now entered the mass production stage.

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