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10PCS Cdsenet TX2400-FPC-6615 2.4GHz WiFi FPC Antenna 3.5dBi IPEX-I 66x15mm Compact and Lightweight
10PCS Cdsenet TX2400-FPC-6615 2.4GHz WiFi FPC Antenna 3.5dBi IPEX-I 66x15mm Compact and Lightweight
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SKU:10*TX2400-FPC-6615
Product Overview
The TX2400-FPC-6615 is a 2.4GHz omnidirectional FPC (Flexible Printed Circuit) internal antenna engineered for WiFi, Bluetooth, ZigBee, and 2.4GHz ISM band IoT devices requiring higher gain than standard compact FPC antennas. It delivers a measured peak gain of 3.5 dBi — 1.0 dBi more than the TX2400-FPC-3014 and TX2400-FPC-4008 — with VSWR of 1.33 at 2.4GHz and 1.16 at 2.5GHz, confirming ≤1.5 across the full 2.4–2.5GHz ISM band. The 66 × 15mm FPC radiator with a 120mm IPEX-I feeder is suited for IoT gateways, smart home hubs, and industrial wireless nodes where enclosure space allows a larger antenna footprint in exchange for improved signal range. Updated March 2026.
Technical Specifications
| Parameter | Value |
|---|---|
| Frequency Range | 2.4 – 2.5 GHz (WiFi 2.4GHz, Bluetooth, ZigBee, ISM) |
| Peak Gain | 3.5 dBi |
| VSWR | ≤ 1.5 (Typ. 1.33 @ 2.4 GHz & 1.16 @ 2.5 GHz) |
| Impedance | 50 Ω |
| Connector Type | IPEX-I (IPEX Gen 1 / U.FL compatible, gold-plated) |
| Cable Length | 120 mm (customizable per order) |
| Antenna Dimensions | 66 × 15 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
66 × 15mm FPC Radiator — 3.5 dBi Gain Through Extended Aperture
The TX2400-FPC-6615 achieves 3.5 dBi gain — 1.0 dBi higher than the 30 × 14mm and 40 × 8mm FPC alternatives — by using a larger 66 × 15mm radiator aperture that allows a more efficient current distribution at 2.4GHz. The additional gain translates to approximately 26% greater effective radiated power compared to a 2.5 dBi antenna at the same transmit power, extending the usable communication range in open environments. The 3M adhesive backing enables tool-free mounting on flat or gently curved inner surfaces of non-metallic enclosures.
Dual-Point VSWR Verification — ≤1.5 Across Full 2.4–2.5GHz Band
Unlike single-point VSWR measurements, the TX2400-FPC-6615 is verified at both band edges: VSWR = 1.33 at 2.4GHz and 1.16 at 2.5GHz, confirming ≤1.5 across the entire 2.4–2.5GHz ISM band. This dual-point verification ensures consistent impedance matching for WiFi channels 1–13 (2.412–2.472GHz), Bluetooth (2.402–2.480GHz), and ZigBee (2.405–2.480GHz) simultaneously. The gold-plated IPEX-I connector with 120mm customizable feeder mates with ESP32, nRF52840, CC2652, and other 2.4GHz SoCs with IPX-I ports.
Professional Test Report
Measured with a vector network analyzer (Agilent E5071C equivalent): VSWR = 1.33 @ 2.4 GHz and 1.16 @ 2.5 GHz, confirming ≤1.5 across the full 2.4–2.5 GHz operating band. Return loss ≈ 17 dB at 2.4GHz and ≈ 22 dB at 2.5GHz.
Ideal Applications
WiFi IoT Gateways & Smart Home Hubs
Smart home gateways, WiFi IoT hubs, and home automation controllers where the 66 × 15mm footprint fits and the 3.5 dBi gain extends coverage compared to smaller FPC alternatives.
ZigBee & Bluetooth Mesh Networks
ZigBee 3.0 coordinator nodes, Bluetooth 5.x mesh gateways, and Thread border routers where higher gain improves mesh network range and reduces the number of repeater nodes required.
Industrial Wireless Sensor Nodes
Industrial IoT sensor nodes, wireless data acquisition terminals, and 2.4GHz ISM band monitoring devices where the 3.5 dBi gain provides extended range in non-metallic industrial enclosures.
Agricultural & Environmental Monitoring
WiFi or ZigBee-connected environmental sensors for smart agriculture, greenhouse monitoring, and outdoor IoT deployments where the higher gain compensates for signal attenuation through vegetation.
Resources
📄 Download Datasheet (PDF)Frequently Asked Questions
Q: When should I choose the TX2400-FPC-6615 over the TX2400-FPC-3014 or TX2400-FPC-4008?
A: Choose the TX2400-FPC-6615 when your enclosure can accommodate the 66 × 15mm footprint and you need the additional 1.0 dBi gain (3.5 vs 2.5 dBi) for extended range. The 3014 (30 × 14mm) and 4008 (40 × 8mm) are better suited for space-constrained devices. The 6615's dual-point VSWR verification (≤1.5 at both 2.4GHz and 2.5GHz) also makes it a reliable choice for multi-protocol devices using WiFi, Bluetooth, and ZigBee simultaneously.
Q: Which 2.4GHz protocols does the TX2400-FPC-6615 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 dual-point VSWR verification at 2.4GHz and 2.5GHz confirms consistent impedance matching across all these protocols simultaneously.
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-6615 must be mounted on the inner surface of a non-metallic (ABS, PC, or TPEE) enclosure with a minimum 3mm clearance from metal components. For metal enclosures, use an external 2.4GHz antenna with a bulkhead SMA connector routed through a feedthrough.
Q: How do I mount the TX2400-FPC-6615 and what clearances are required?
A: Peel the 3M adhesive backing and press the 66 × 15mm FPC flat against the inner wall of a non-metallic enclosure. Keep the antenna at least 3mm from the PCB ground plane, battery, and metal shielding cans. Route the 120mm coaxial feeder to your 2.4GHz module's IPEX-I socket and press-fit the connector until it clicks. For the 66mm length, ensure the mounting surface is flat or has a gentle curve radius >50mm to avoid delamination of the adhesive backing.
Q: What is the operating temperature range and is it suitable for outdoor IoT deployments?
A: The TX2400-FPC-6615 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.