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10PCS Cdsenet TX433-FPC-2906 433MHz FPC Internal Antenna 2.0 dBi VSWR≤1.5
10PCS Cdsenet TX433-FPC-2906 433MHz FPC Internal Antenna 2.0 dBi VSWR≤1.5
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SKU:10*TX433-FPC-2906
Product Overview
The TX433-FPC-2906 is a compact 433 MHz FPC (Flexible Printed Circuit) internal antenna engineered for space-constrained IoT wireless applications. With a measured peak gain of 2.0 dBi and VSWR ≤ 1.5 across 423–443 MHz, it delivers reliable sub-1GHz RF performance in a 29 × 6 mm footprint. The 90° flying 1.13 mm coaxial lead enables flexible routing inside plastic enclosures. Suitable for LoRa modules, smart home sensors, wireless meter reading, and industrial telemetry. Updated March 2026.
Technical Specifications
| Parameter | Technical Value |
|---|---|
| Frequency Range | 423 – 443 MHz (center: 433 MHz) |
| Peak Gain | 2.0 dBi |
| VSWR | ≤ 1.5 (verified by Agilent E5071C VNA) |
| Connector / Interface | Welding / IPEX (optional) |
| Antenna Material | FPC (Flexible Printed Circuit) |
| Dimensions | 29 mm × 6 mm |
| Cable | 1.13 mm coaxial, 90° flying lead |
| Impedance | 50 Ω |
| Certification | CE / RoHS compliant |
| Updated | March 2026 |
Product Details
Self-Adhesive FPC Patch — Clean Internal Integration
High-quality adhesive backing allows direct mounting inside plastic enclosures without drilling or external hardware. The FPC substrate conforms to curved surfaces, maintaining consistent 2.0 dBi gain even in tight housings. Ideal for sealed IoT devices where external antenna ports are not feasible.
90° Flying 1.13 mm Lead — Flexible Routing, Reduced Stress
The 90-degree angled coaxial lead minimizes bending radius requirements and reduces mechanical stress at the solder joint. Compatible with standard IPEX/U.FL connectors (optional), enabling tool-free connection to common 433 MHz RF modules such as SX1278-based LoRa boards.
Professional Test Report
VSWR measured at ≤ 1.5 across 423–443 MHz using an Agilent E5071C Vector Network Analyzer. Return loss > 14 dB confirms efficient power transfer with minimal reflection.
Ideal Applications
LoRa & Sub-1GHz Wireless Modules
Compatible with SX1276/SX1278-based LoRa modules and standard 433 MHz RF transceivers for long-range, low-power data transmission up to several kilometers in open environments.
Smart Home & Security
Wireless door/window sensors, remote controls, smart meter reading (AMR), and alarm systems operating on the 433 MHz ISM band.
Industrial Telemetry & SCADA
Remote sensor nodes, pipeline monitoring, and industrial automation controllers requiring compact embedded antennas in sealed enclosures.
Agriculture & Environmental Monitoring
Soil moisture sensors, weather stations, and livestock tracking devices deployed in field conditions where a low-profile internal antenna is preferred.
Resources
Download Datasheet (PDF)FAQ
Q: Which RF modules is the TX433-FPC-2906 compatible with?
A: The TX433-FPC-2906 is compatible with any 433 MHz RF module with a 50 Ω impedance interface, including SX1276/SX1278-based LoRa modules, CC1101, and Si4432 transceivers. The welding interface suits direct PCB integration, while the optional IPEX connector supports plug-and-play connection to modules with U.FL ports. Ensure the module's operating frequency falls within 423–443 MHz for optimal VSWR ≤ 1.5 performance.
Q: How should I install this antenna inside a device enclosure?
A: Clean the mounting surface with isopropyl alcohol and allow it to dry. Peel the adhesive backing and press the FPC antenna firmly onto a non-metallic (plastic or PCB) surface, keeping it at least 5 mm away from metal components or ground planes to avoid detuning. Route the 1.13 mm flying lead to the module connector without sharp bends (minimum bend radius: 5 mm). Avoid placing the antenna directly behind metal shielding cans.
Q: What are the environmental and durability ratings?
A: The TX433-FPC-2906 is an internal antenna intended for use within a sealed device enclosure. The FPC substrate operates reliably across a temperature range of -40°C to +85°C, suitable for industrial and outdoor IoT deployments when housed in an IP-rated enclosure. The product is RoHS compliant, ensuring it is free from hazardous substances including lead, mercury, and cadmium.
Q: What is the maximum transmit power this antenna supports?
A: The TX433-FPC-2906 is rated for use with standard low-power wireless modules, supporting input power up to 5 W (37 dBm). For typical LoRa and 433 MHz ISM band applications, transmit power is usually 10–100 mW (10–20 dBm), well within the antenna's operating range. Exceeding the rated power may damage the FPC substrate or degrade VSWR performance.
Q: Is the TX433-FPC-2906 CE and RoHS certified?
A: Yes. The TX433-FPC-2906 is CE marked and RoHS compliant, meeting European Union electromagnetic compatibility (EMC) and hazardous substance directives. This makes it suitable for integration into end products targeting EU markets. Download the full datasheet above for certification documentation details.