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10PCS Cdsenet TX2400-FPC-4008 2.4GHz WiFi FPC Antenna 2.5dBi IPEX-I 40x8mm Compact and Lightweight
10PCS Cdsenet TX2400-FPC-4008 2.4GHz WiFi FPC Antenna 2.5dBi IPEX-I 40x8mm Compact and Lightweight
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SKU:10*TX2400-FPC-4008
Product Overview
The TX2400-FPC-4008 is a 2.4GHz omnidirectional FPC (Flexible Printed Circuit) internal antenna engineered for WiFi, Bluetooth, ZigBee, and 2.4GHz ISM band IoT devices. It delivers a measured peak gain of 2.5 dBi and a typical VSWR of 1.26 at 2.44GHz — tuned to the center of the WiFi 2.4GHz channel range (channels 1–13) — covering the full 2.4–2.5GHz ISM band. The slim 40 × 8mm FPC radiator with a 125mm IPEX-I feeder is optimized for narrow-profile enclosures such as smart light switches, wall-mount sensors, and slim IoT panels where width is constrained but length is available. Updated March 2026.
Technical Specifications
| Parameter | Value |
|---|---|
| Frequency Range | 2.4 – 2.5 GHz (WiFi 2.4GHz, Bluetooth, ZigBee, ISM) |
| Peak Gain | 2.5 dBi |
| VSWR | ≤ 2.0 (Typ. 1.26 @ 2.44 GHz — WiFi channel center) |
| Impedance | 50 Ω |
| Connector Type | IPEX-I (IPEX Gen 1 / U.FL compatible, gold-plated) |
| Cable Length | 125 mm |
| Antenna Dimensions | 40 × 8 mm |
| Radiator Material | FPC (Flexible Printed Circuit) |
| Radiation Pattern | Omnidirectional (vertical polarization) |
| Max Input Power | 50 W |
| Operating Temperature | -40 °C to +85 °C |
| Compliance | RoHS |
| Last Updated | March 2026 |
Product Details
40 × 8mm Slim-Profile FPC — Optimized for Narrow-Profile Enclosures
The 40 × 8mm aspect ratio is specifically suited for narrow-profile enclosures such as smart light switches, wall-mount IoT panels, and slim sensor housings where the 8mm width fits within tight PCB edge clearances. Compared to the square-format TX2400-FPC-3014 (30 × 14mm), the 4008 trades width for length, providing a different mounting geometry for different enclosure constraints. The 3M adhesive backing enables tool-free mounting on curved or flat inner surfaces of non-metallic enclosures.
Gold-Plated IPEX-I Connector — 2.44GHz Center-Tuned for WiFi Channel Optimization
The gold-plated IPEX-I (U.FL-compatible) connector mates directly with ESP32, ESP8266, nRF52840, CC2652, and other 2.4GHz wireless SoCs with IPX-I antenna ports. The antenna is center-tuned at 2.44GHz — the midpoint of WiFi channels 1–13 (2.412–2.472GHz) — ensuring consistent VSWR performance across all WiFi 2.4GHz channels rather than being optimized only for the band edges. The 125mm coaxial feeder provides routing flexibility inside compact IoT enclosures.
Professional Test Report
Measured with a vector network analyzer (Agilent E5071C equivalent): VSWR = 1.26 @ 2.44 GHz, confirming ≤2.0 across the full 2.4–2.5 GHz operating band. Return loss ≈ 19 dB at the measured frequency point.
Ideal Applications
Smart Home & Wall-Mount Devices
Smart light switches, wall-mount IoT panels, smart plugs, and home automation controllers where the 40 × 8mm slim profile fits within narrow enclosure walls.
WiFi & Bluetooth Sensor Nodes
WiFi 802.11b/g/n sensor nodes, Bluetooth 5.x beacons, and ZigBee 3.0 mesh devices using ESP32, nRF52840, or CC2652-based designs with IPEX-I antenna ports.
Industrial IoT & Telemetry
Compact industrial telemetry systems, wireless data acquisition terminals, and 2.4GHz ISM band monitoring devices in metal-free housings requiring a slim internal antenna.
Consumer Electronics
Compact consumer electronics, portable devices, and slim-form-factor gadgets where the 8mm width enables 2.4GHz wireless connectivity in enclosures too narrow for wider FPC formats.
Resources
📄 Download Datasheet (PDF)Frequently Asked Questions
Q: What is the difference between the TX2400-FPC-4008 and TX2400-FPC-3014?
A: Both antennas cover 2.4–2.5GHz with 2.5 dBi gain and IPEX-I connectors, but differ in form factor and tuning. The TX2400-FPC-4008 (40 × 8mm, 125mm cable) is slim and long, center-tuned at 2.44GHz for WiFi channel optimization, with VSWR ≤2.0. The TX2400-FPC-3014 (30 × 14mm, 118mm cable) is more square, tuned at 2.5GHz, with VSWR ≤1.5. Choose 4008 for narrow-profile enclosures and WiFi-centric applications; choose 3014 for square-format enclosures requiring tighter impedance matching.
Q: Which 2.4GHz protocols does the TX2400-FPC-4008 support?
A: The 2.4–2.5GHz frequency range covers WiFi 802.11b/g/n (2.412–2.484GHz), Bluetooth Classic and BLE 5.x (2.402–2.480GHz), ZigBee 3.0 (2.405–2.480GHz), Thread, Matter, and proprietary 2.4GHz FSK/GFSK protocols. The center tuning at 2.44GHz aligns with the midpoint of WiFi channels 1–13, providing consistent VSWR across all WiFi 2.4GHz channels.
Q: Can this antenna be installed inside a metal enclosure?
A: No. Placing any FPC antenna inside a metallic housing causes severe signal attenuation due to RF shielding. The TX2400-FPC-4008 must be mounted on the inner surface of a non-metallic (ABS, PC, or TPEE) enclosure with a minimum 3mm clearance from metal components. At 2.4GHz, even partial metal coverage significantly degrades antenna performance. For metal enclosures, use an external 2.4GHz antenna with a bulkhead SMA connector.
Q: How do I mount the TX2400-FPC-4008 inside my device?
A: Peel the 3M adhesive backing and press the 40 × 8mm FPC flat against the inner wall of a non-metallic enclosure, oriented with the long axis parallel to the enclosure wall. Route the 125mm coaxial feeder to your 2.4GHz module's IPEX-I socket and press-fit the connector until it clicks. Keep the antenna at least 3mm from the PCB ground plane, battery, and metal shielding cans. No soldering is required.
Q: What is the operating temperature range and is it suitable for outdoor IoT deployments?
A: The TX2400-FPC-4008 is rated for -40°C to +85°C. The FPC substrate is RoHS-compliant and resistant to humidity under standard operating conditions. For outdoor deployments, ensure the host enclosure provides IP65 or higher sealing. The antenna itself is not independently IP-rated and must be protected by the device enclosure from direct rain, UV exposure, and condensation.