FLEXI-M4-433

Antennas RF Overview

The FLEXI-M4-433 is a passive indoor antenna from RF Solutions, designed for ISM band operations at 433 MHz. It features a flexible whip design with a straight mechanical form and an M4 screw fixing mechanism. The component operates as a 1/4 wavelength antenna, supporting protocols including cellular (NB-IoT, LTE), GSM, LoRaWAN, Sigfox, and IEEE 802.15.4 standards such as ANT, Thread, and Zigbee. It is constructed with a rugged plastic finish to ensure durability in various indoor environments.

Antennas RF Feature Summary

• Flexible whip construction with a rugged plastic finish for durability
• Ready-to-operate design requiring no tuning
• Omni-directional radiation pattern for reliable signal coverage
• Simple mounting via M4 screw fixing mechanism

Antennas RF Applications

• LoRaWAN sensor networks
• GSM and NB-IoT communication modules
• Sigfox IoT devices
• Zigbee and Thread home automation systems

Antennas RF Procurement Notes

Verify the specific connector type required for your application, as product listings may vary between SMA, BNC, or other interfaces despite the shared model prefix. Confirm that the M4 mounting thread aligns with your chassis or panel specifications. Ensure the operating frequency matches the 433 MHz ISM band requirements of your target protocol. Cross-reference the datasheet to confirm impedance and gain characteristics suitable for your indoor deployment scenario.

Antennas RF Selection Notes

Select this antenna when a flexible, low-profile solution is needed for indoor ISM band applications. The M4 fixing option provides secure attachment for panels or enclosures. Consider the flexibility of the whip element for routing within confined spaces. This model supports multiple sub-GHz and cellular protocols, making it suitable for multi-standard IoT gateways or sensors requiring robust indoor connectivity without external tuning adjustments.

Antennas RF Part Context

This component belongs to the Flexi-SMA series of antennas by RF Solutions, specifically tailored for indoor use. It shares the flexible whip design philosophy with other models in the lineup but distinguishes itself through the M4 mounting interface and 433 MHz frequency optimization. The series targets developers needing plug-and-play solutions for wireless sensor networks and industrial IoT deployments.

Antennas RF Replacement Considerations

FLEXI-SMA-433 offers similar electrical performance but utilizes an SMA fixing mechanism instead of M4. FLEXI-M4-915 provides comparable physical attributes and mounting but operates at 915 MHz. Verify mechanical fit and frequency alignment before substituting.