ST0686-20-N01-U
Overview
The ST0686-20-N01-U is a 433MHz helical spring antenna designed for space-constrained LoRa and ISM band applications. This solder-through-hole component provides a compact, low-cost wireless solution with a 20MHz bandwidth centered at 433MHz. Its vertical helical structure is optimized for integration into IoT devices where board space is at a premium.
Why Choose This Part
The helical design offers a compact 82mm length while maintaining performance in the UHF range, making it significantly smaller than standard 1/4 wave whips. Its solder-mount termination provides a robust mechanical connection to the PCB without the cost or complexity of RF connectors. The part is rated for wide industrial temperatures from -40C to 105C, ensuring reliability in harsh environments.
Applications
Key Specifications
Getting Started
To integrate this antenna, ensure a proper ground plane is provided on the PCB to act as the second half of the dipole system. Minimize parasitic capacitance near the solder point and keep the antenna clear of metallic enclosures or shielding that could detune the 433MHz resonance. Verification should be performed using a Vector Network Analyzer (VNA) to confirm return loss meets the -9.5dB specification in the final housing.
