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TX433-BLG-40 433MHz 4.5dBi N-Male FRP Antenna
TX433-BLG-40 433MHz 4.5dBi N-Male FRP Antenna
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SKU:tx433-blg-20
Product Overview
The TX433-BLG-40 is a professional-grade 433MHz omnidirectional fiberglass antenna engineered for space-constrained yet demanding outdoor IoT deployments. With a compact 400mm physical length and weighing only 145g, it perfectly balances wind-load resistance with high-performance RF radiation. Operating in the 420–450 MHz Sub-GHz spectrum, its longer wavelengths provide superior physical penetration through concrete walls, heavy machinery, and urban infrastructure compared to 2.4GHz alternatives. Delivering a reliable 4.5 dBi peak gain with a VSWR ≤ 1.5, it ensures minimal signal reflection and efficient energy transfer. Encased in an industrial-grade FRP (Fiberglass Reinforced Plastic) radome and equipped with a robust N-J (N Male) connector, the TX433-BLG-40 is the ultimate compact solution for outdoor LoRa gateways, smart metering bases, and wireless telemetry nodes operating in harsh environments.
Technical Specifications
| Parameter | Technical Value |
|---|---|
| Frequency Range | 420 – 450 MHz (433MHz Sub-GHz Band) |
| Peak Gain | 4.5 dBi |
| VSWR | ≤ 1.5 |
| Connector Type | N-J (N Male) |
| Radome Material | FRP (Weather-resistant Fiberglass) |
| Physical Length | ~ 400 mm |
| Weight | 145g ± 5g |
| Impedance | 50 Ω |
| Radiation Pattern | Omnidirectional |
Updated: April 2026
Product Details
Solving Space Constraints with a 400mm Compact Profile
Unlike cumbersome 1.2-meter antennas that are difficult to mount in tight industrial spaces or low-clearance areas, the TX433-BLG-40 offers a highly streamlined 400mm profile. Weighing an ultra-light 145g, it drastically reduces mechanical stress on mounting brackets and minimizes wind-load resistance. Despite its compact size, the internally optimized copper oscillators maintain a solid 4.5 dBi gain, providing excellent omnidirectional coverage without the bulk.
Sub-GHz Penetration for Complex Environments
Standard high-frequency signals (like 2.4GHz) easily bounce off physical barriers. By operating strictly within the 420-450MHz Sub-GHz band, this antenna utilizes longer wavelengths to naturally diffract around and penetrate thick concrete buildings, heavy factory machinery, and dense forest canopies. It resolves the core pain point of weak signal penetration, effectively eliminating communication dead zones in complex urban or industrial layouts.
Professional Test Report
Validated on a vector network analyzer across the 420–450 MHz band: VSWR ≤ 1.5 ensures extreme energy transfer efficiency. This low reflection rate guarantees that your expensive RF modules operate at peak thermal efficiency without burning out from reflected power during continuous telemetry broadcasts.
Ideal Applications & Ebyte Module Synergy
Synergy with Ebyte E22 LoRa Modules
Pain Point Resolved: Weak Signal Penetration. When paired with Ebyte's SX1262-based E22 series LoRa modules, this 4.5dBi antenna maximizes the LoRa spread-spectrum penetration advantage. Quantitative field tests show that replacing a standard 2dBi whip antenna with the TX433-BLG-40 boosts the deep-indoor packet reception rate of an E22 module by up to 35% in densely built urban environments, effortlessly piercing through multiple concrete walls for smart metering applications.
Synergy with Ebyte E73/Sub-GHz Transceivers
Pain Point Resolved: Co-channel Interference & Instability. In highly congested factory floors saturated with 2.4GHz Wi-Fi/Bluetooth noise, pairing Ebyte's Sub-GHz transceivers with this precisely tuned 433MHz FRP antenna completely bypasses high-frequency interference. The stable VSWR (≤1.5) ensures continuous, reflection-free energy transfer, stabilizing long-distance links and maintaining 99.9% telemetry data delivery success rates over 5-8 kilometer LOS distances.
Compact Smart Agriculture Nodes
Perfect for establishing decentralized 433MHz data collection hubs across sprawling farmlands. The compact 400mm frame makes it easy to mount on small solar-powered sensor poles without creating top-heavy wind loads.
Confined Space Industrial Telemetry
Its highly sealed FRP radome and N-Male connector are immune to factory dust and oil. The 400mm length is specifically tailored for low-clearance manufacturing environments and indoor automated guided vehicle (AGV) routing systems.
Resources
📄 Download Official Datasheet (PDF)Frequently Asked Questions
Q: Can I directly attach the N-J (N Male) connector to the SMA ports on Ebyte E22 or E73 modules?
A: No, direct physical connection is not possible. Ebyte's compact E22 and E73 series modules typically feature IPEX or SMA interfaces designed for PCBs. Since the TX433-BLG-40 is a rugged outdoor antenna equipped with an industrial N-J connector, you will need a low-loss "N Female to SMA Male" RF adapter cable to bridge the connection securely without compromising the 4.5 dBi gain.
Q: How does the compact 400mm length compare to longer 1200mm antennas in terms of 433MHz performance?
A: While a 1200mm antenna offers higher gain (e.g., 8dBi) for extreme long-distance flat-terrain transmission, it compresses the vertical beam heavily and requires strict wind-load mounting. The 400mm TX433-BLG-40 provides a balanced 4.5 dBi gain, which naturally produces a wider vertical radiation angle. This makes it vastly superior for communicating with IoT nodes placed at varying elevations (like smart meters in basements or sensors on multi-level factory floors) while fitting easily into space-restricted areas.
Q: Is the 145g lightweight FRP radome durable enough for permanent outdoor exposure?
A: Absolutely. Despite its ultra-lightweight 145g construction, the FRP (Fiberglass Reinforced Plastic) shell is fully UV-stabilized, waterproof, and designed to withstand harsh outdoor elements. To ensure long-term stability, simply wrap the N-J connector joint at the base with professional waterproof amalgamating tape to prevent moisture from entering the RF pathway during heavy storms.