This 433MHz built-in spring welding antenna is a high-performance miniature RF solution designed for 400MHz to 450MHz frequency bands. Featuring a durable spring-loaded structure and pre-soldered gold-plated pins, it enables easy integration into IoT modules, smart devices, and embedded wireless systems. Paired with a premium RG113 semi-rigid coaxial cable, this omnidirectional (spiral) antenna delivers stable signal transmission, long communication distance, and strong anti-interference performance—ideal for space-constrained IoT, industrial, and consumer electronics applications.
Key Features
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Frequency Optimization for 433MHzTuned specifically for the 433MHz ISM band, with full compatibility across
400MHz – 450MHz. Ensures maximum efficiency for data transmission, remote control, and sensor communication.
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Built-in Spring & Welding DesignCompact spring structure provides vibration resistance and physical protection, while the gold-plated pin allows direct PCB soldering. Perfect for internal mounting in compact devices, sensors, and control modules.
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RG113 Low-Loss Coaxial CableRG113 cable offers superior shielding effectiveness, low signal attenuation, and excellent flexibility. Maintains stable RF performance even in tight, fixed installations, making it suitable for permanent device integration.
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Omnidirectional Radiation PatternVertical omnidirectional (360°) coverage eliminates signal dead zones, ensuring reliable communication in all directions for wireless transceivers, gateways, and IoT sensors.
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50Ω Impedance MatchingStandard 50Ω impedance ensures optimal RF performance, minimizing signal reflection (VSWR ≤ 1.5) and maximizing power transfer for high-reliability wireless links.
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Industrial-Grade DurabilityHigh-quality ABS rubber antenna housing and gold-plated contacts resist bending, vibration, oxidation, and corrosion. Operates reliably across a wide temperature range for long-term use.
Common Applications
IoT & Smart Devices: Smart home hubs, wireless sensors, energy meters, and environmental monitors.
Industrial Communication: PLCs, industrial controllers, and wireless data transmission modules.
Remote Control & Alarm: Garage door openers, security alarms, and remote transceivers.
Consumer Electronics: Wireless toys, RC vehicles, and portable communication devices.
RF Test & Measurement: Miniature RF signal links for laboratory and prototype development.
Why Choose This 433MHz Spring Antenna?
Space-Saving Design: Miniature spring structure fits perfectly in ultra-compact PCB and device enclosures.
Tool-Free Integration: Direct soldering design eliminates the need for additional connectors, simplifying assembly and reducing installation costs.
High Reliability: RG113 cable and spring construction provide excellent resistance to vibration and mechanical stress, ideal for industrial and mobile applications.
Long Communication Distance: Optimized gain and low-loss RG113 cable extend signal range compared to standard internal antennas.
Full Compatibility: Works with all standard 433MHz RF transceivers and IoT modules for seamless system integration.
Customization Options
We provide full custom solutions for this antenna:
Custom Cable Lengths: 50mm to 500mm (per your requirements).
Connector Types: IPEX/U.FL, MMCX, or other pin configurations (upon request).
Frequency Tuning: Customization for 418MHz, 470MHz, or other ISM bands.
Bulk OEM/ODM: Private labeling, custom packaging, and technical support for high-volume projects.
