# SPRING ANTENNA, 862 TO 874MHZ, 2.5DBI

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**URL**: https://novapart.co/products/ST0686-10-N01-U/spring-antenna-862-to-874mhz-25dbi
**SKU**: ST0686-10-N01-U
**Manufacturer**: AMPHENOL RF
**Price**: €0.6720
**Stock**: 10+
**Lead Time**: 116 days (indicative)

## Description

The Amphenol RF ST0686-10-N01-U is a helical wire spring antenna engineered for narrowband sub-GHz wireless communication operating within the 862 MHz to 874 MHz frequency band. This passive radiating element delivers a peak gain of 2.5 dBi, optimizing directional radiation efficiency and link margin for compact RF systems. Designed for direct integration onto printed circuit boards via through-hole or soldered terminal connections, the three-dimensional coil geometry of the spring antenna provides an omnidirectional radiation pattern in the azimuth plane while maintaining a minimal physical footprint within space-constrained enclosures.

Constructed from resilient spring-tempered conductive wire, the ST0686-10-N01-U maintains mechanical stability and structural integrity against vibrational stress and thermal expansion cycles common in harsh operational environments. Impedance matching to a standard 50-ohm unbalanced RF feedline is achieved through physical placement and tuning relative to the host ground plane, minimizing return loss (S11) and VSWR across the specified European Short Range Device (SRD) frequency spectrum. 

This surface-mountable or pin-fed helical antenna is well-suited for integration into Internet of Things (IoT) edge nodes, wireless telemetry transmitters, industrial automation sensors, and automatic meter reading (AMR) infrastructure. Its frequency specificity in the 862–874 MHz range aligns with regional ISM and SRD allocations, ensuring regulatory compliance and reliable RF link performance in unlicensed sub-GHz deployment scenarios.

## Links

- [View this product on Novapart](https://novapart.co/products/ST0686-10-N01-U/spring-antenna-862-to-874mhz-25dbi)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/amphenol-rf/st0686-10-n01-u/spring-antenna-862-to-874mhz-2/dp/4825602)
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