{"product_id":"tx2400-fpc-2509-2-4ghz-fpc-antenna-2-0-dbi-ipex-1","title":"Cdsenet TX2400-FPC-2509 2.4GHz FPC Antenna 2.0 dBi IPEX-1 25×9mm IoT","description":"\u003cdiv style=\"font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; color: #333; line-height: 1.6; max-width: 1000px; margin: 0 auto; padding: 10px;\"\u003e\n\u003csection style=\"margin-bottom: 40px;\"\u003e\n\u003ch2 style=\"font-size: 24px; color: #111; border-bottom: 2px solid #eee; padding-bottom: 10px; margin-bottom: 20px;\"\u003eProduct Overview\u003c\/h2\u003e\n\u003cp style=\"font-size: 16px; color: #444; margin-bottom: 20px;\"\u003eThe \u003cstrong\u003eTX2400-FPC-2509\u003c\/strong\u003e is an ultra-compact built-in FPC (Flexible Printed Circuit) antenna engineered for the \u003cstrong\u003e2400–2500 MHz (2.4 GHz ISM) band\u003c\/strong\u003e, covering WiFi 802.11b\/g\/n, Bluetooth 5.x, Zigbee, and Thread protocols. Measuring just \u003cstrong\u003e25 × 9 mm\u003c\/strong\u003e with a \u003cstrong\u003e2.0 dBi peak gain\u003c\/strong\u003e and a measured \u003cstrong\u003eVSWR of 1.47 @ 2.5 GHz\u003c\/strong\u003e, it is one of the smallest 2.4 GHz FPC antennas available for internal integration. The standard \u003cstrong\u003eIPEX-1 (U.FL) connector\u003c\/strong\u003e with a 100 mm coaxial feeder ensures direct compatibility with mainstream 2.4 GHz wireless modules. Suited for smart home sensors, Bluetooth speakers, Zigbee gateways, and compact IoT devices. \u003cem\u003eUpdated March 2026.\u003c\/em\u003e\u003c\/p\u003e\n\u003cimg style=\"max-width: 100%; border-radius: 6px;\" loading=\"lazy\" alt=\"TX2400-FPC-2509 2.4GHz FPC antenna 25x9mm ultra-compact with IPEX-1 connector overview\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0702\/9918\/9350\/files\/TX2400-FPC-2509.png?v=1774596379\"\u003e\u003c\/section\u003e\n\u003csection style=\"margin-bottom: 40px;\"\u003e\n\u003ch2 style=\"font-size: 22px; color: #111; border-bottom: 2px solid #eee; padding-bottom: 10px; margin-bottom: 20px;\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cdiv style=\"overflow-x: auto;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 14px; text-align: left; border: 1px solid #ececec;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f9f9f9; border-bottom: 2px solid #eee;\"\u003e\n\u003cth style=\"padding: 12px; font-weight: bold; color: #333;\"\u003eParameter\u003c\/th\u003e\n\u003cth style=\"padding: 12px; font-weight: bold; color: #333;\"\u003eTechnical Value\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 600;\"\u003eFrequency Range\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003e2400–2500 MHz (2.4 GHz ISM)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #f0f0f0; background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 600;\"\u003ePeak Gain\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003e2.0 dBi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 600;\"\u003eVSWR\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; font-weight: bold; color: #e4393c;\"\u003e≤ 2.0 (Measured: 1.47 @ 2.5 GHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #f0f0f0; background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 600;\"\u003eConnector \/ Interface\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eIPEX-1 (U.FL, Generation 1)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 600;\"\u003eFeeder Cable\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003e100 mm coaxial (customizable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #f0f0f0; background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 600;\"\u003eImpedance\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003e50 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 600;\"\u003eAntenna Material\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eFPC (Flexible Printed Circuit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #f0f0f0; background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 600;\"\u003eDimensions\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003e25 mm × 9 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 600;\"\u003ePolarization\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eLinear\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #f0f0f0; background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 600;\"\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003e−40 °C to +85 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 600;\"\u003eCompliance\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eRoHS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #f0f0f0; background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 600;\"\u003eLast Updated\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eMarch 2026\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection style=\"margin-bottom: 40px;\"\u003e\n\u003ch2 style=\"font-size: 22px; color: #111; border-bottom: 2px solid #eee; padding-bottom: 10px; margin-bottom: 25px;\"\u003eProduct Details\u003c\/h2\u003e\n\u003cdiv style=\"background: #ffffff; border: 1px solid #eee; border-radius: 8px; padding: 20px; margin-bottom: 20px;\"\u003e\n\u003ch3 style=\"font-size: 18px; color: #111; margin: 0 0 10px 0;\"\u003eUltra-Compact 25 × 9 mm Footprint — Smallest-Class 2.4 GHz FPC\u003c\/h3\u003e\n\u003cp style=\"font-size: 14px; color: #666; margin-bottom: 15px;\"\u003eAt 25 × 9 mm, the TX2400-FPC-2509 occupies less than half the board area of a standard 50 mm FPC antenna, making it the preferred choice for wearables, coin-cell IoT sensors, and ultra-slim smart home devices where PCB real estate is critical. The adhesive-backed FPC substrate (thickness \u0026lt; 0.3 mm) attaches directly to the inner wall of plastic enclosures without screws or brackets, tolerating bending radii down to 5 mm.\u003c\/p\u003e\n\u003cimg style=\"max-width: 100%; border-radius: 6px;\" loading=\"lazy\" alt=\"TX2400-FPC-2509 ultra-compact 25x9mm FPC antenna adhesive installation inside IoT device enclosure\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0702\/9918\/9350\/files\/TX2400-FPC-2509-4.png?v=1774596381\"\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #ffffff; border: 1px solid #eee; border-radius: 8px; padding: 20px;\"\u003e\n\u003ch3 style=\"font-size: 18px; color: #111; margin: 0 0 10px 0;\"\u003eStandard IPEX-1 (U.FL) Connector — Universal 2.4 GHz Module Compatibility\u003c\/h3\u003e\n\u003cp style=\"font-size: 14px; color: #666; margin-bottom: 15px;\"\u003eThe gold-plated IPEX-1 (U.FL) connector with a 100 mm coaxial feeder is directly compatible with mainstream 2.4 GHz wireless modules including Espressif ESP32\/ESP8266, Nordic nRF52840, Silicon Labs EFR32MG, Texas Instruments CC2652, and Qualcomm QCA4020. The 50 Ω impedance match eliminates the need for external matching networks, and the measured VSWR of 1.47 @ 2.5 GHz confirms \u0026lt; 3% reflected power at the antenna port.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection style=\"margin-bottom: 40px;\"\u003e\n\u003ch2 style=\"font-size: 22px; color: #111; border-bottom: 2px solid #eee; padding-bottom: 10px; margin-bottom: 20px;\"\u003eProfessional Test Report\u003c\/h2\u003e\n\u003cdiv style=\"background-color: #f8fbff; border: 1px solid #e1ecf7; border-radius: 8px; padding: 20px; text-align: center;\"\u003e\n\u003cp style=\"font-size: 15px; color: #1e3a8a; margin-bottom: 15px;\"\u003eMeasured with a vector network analyzer: \u003cstrong\u003eVSWR = 1.47 @ 2.5 GHz\u003c\/strong\u003e and \u003cstrong\u003e2.22 @ 2.4 GHz\u003c\/strong\u003e. Best impedance match is achieved at the upper 2.4 GHz band edge (2.5 GHz), which aligns with WiFi channel 13\/14 and Bluetooth upper channels. For applications centered at 2.45 GHz, the effective VSWR is approximately 1.8, corresponding to a return loss of ~10 dB.\u003c\/p\u003e\n\u003cdiv style=\"border: 1px dashed #ccc; padding: 15px; background: #fff; margin-bottom: 10px;\"\u003e\u003cimg style=\"max-width: 100%; border-radius: 4px;\" loading=\"lazy\" alt=\"TX2400-FPC-2509 VSWR test report chart showing 1.47 at 2.5GHz measured by vector network analyzer\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0702\/9918\/9350\/files\/TX2400-FPC-2509-1.png?v=1774596380\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"border: 1px dashed #ccc; padding: 15px; background: #fff;\"\u003e\u003cimg style=\"max-width: 100%; border-radius: 4px;\" loading=\"lazy\" alt=\"TX2400-FPC-2509 S11 return loss measurement chart across 2.4-2.5GHz WiFi band\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0702\/9918\/9350\/files\/TX2400-FPC-2509-2.png?v=1774596380\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection style=\"margin-bottom: 40px;\"\u003e\n\u003ch2 style=\"font-size: 22px; color: #111; border-bottom: 2px solid #eee; padding-bottom: 10px; margin-bottom: 25px;\"\u003eIdeal Applications\u003c\/h2\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 16px;\"\u003e\n\u003cdiv style=\"flex: 1 1 calc(25% - 12px); min-width: 160px; border: 1px solid #f0f0f0; border-radius: 10px; padding: 15px; background: #fff; box-sizing: border-box;\"\u003e\n\u003ch3 style=\"font-size: 15px; margin: 0 0 8px 0; color: #0056b3;\"\u003e📶 WiFi \u0026amp; Bluetooth Devices\u003c\/h3\u003e\n\u003cp style=\"font-size: 13px; color: #666; margin: 0;\"\u003eSmart home gadgets, Bluetooth 5.x speakers, WiFi 802.11b\/g\/n sensors, and compact IoT nodes requiring a minimal 2.4 GHz antenna footprint.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 calc(25% - 12px); min-width: 160px; border: 1px solid #f0f0f0; border-radius: 10px; padding: 15px; background: #fff; box-sizing: border-box;\"\u003e\n\u003ch3 style=\"font-size: 15px; margin: 0 0 8px 0; color: #0056b3;\"\u003e🏠 Zigbee \u0026amp; Smart Home\u003c\/h3\u003e\n\u003cp style=\"font-size: 13px; color: #666; margin: 0;\"\u003eZigbee 3.0 end devices, Thread border routers, and Matter-compatible smart home sensors embedded in slim plastic housings.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 calc(25% - 12px); min-width: 160px; border: 1px solid #f0f0f0; border-radius: 10px; padding: 15px; background: #fff; box-sizing: border-box;\"\u003e\n\u003ch3 style=\"font-size: 15px; margin: 0 0 8px 0; color: #0056b3;\"\u003e⌚ Wearables \u0026amp; Medical IoT\u003c\/h3\u003e\n\u003cp style=\"font-size: 13px; color: #666; margin: 0;\"\u003eFitness trackers, health monitors, and coin-cell-powered BLE sensors where the 25 × 9 mm form factor enables integration in wristbands and patches.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 calc(25% - 12px); min-width: 160px; border: 1px solid #f0f0f0; border-radius: 10px; padding: 15px; background: #fff; box-sizing: border-box;\"\u003e\n\u003ch3 style=\"font-size: 15px; margin: 0 0 8px 0; color: #0056b3;\"\u003e🏭 Industrial Wireless Sensors\u003c\/h3\u003e\n\u003cp style=\"font-size: 13px; color: #666; margin: 0;\"\u003eCompact industrial Zigbee\/WiFi sensor nodes, wireless I\/O modules, and SCADA edge devices operating in −40 °C to +85 °C environments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection style=\"margin-bottom: 40px;\"\u003e\n\u003ch2 style=\"font-size: 22px; color: #111; border-bottom: 2px solid #eee; padding-bottom: 10px; margin-bottom: 25px;\"\u003eResources\u003c\/h2\u003e\n\u003ca rel=\"noopener\" style=\"display: inline-block; padding: 12px 25px; background-color: #0056b3; color: #fff; text-decoration: none; border-radius: 6px; font-weight: 600; font-size: 15px;\" href=\"https:\/\/www.cdebyte.com\/pdf-down.aspx?id=1621\" target=\"_blank\"\u003e📄 Download Datasheet — TX2400-FPC-2509 (PDF)\u003c\/a\u003e\u003c\/section\u003e\n\u003csection style=\"border-top: 1px solid #eee; padding-top: 30px; margin-bottom: 20px;\"\u003e\n\u003ch2 style=\"font-size: 20px; color: #111; margin-bottom: 20px;\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv style=\"margin-bottom: 20px; padding: 15px; background: #fafafa; border-radius: 8px;\"\u003e\n\u003cp style=\"font-weight: bold; margin-bottom: 6px;\"\u003eQ: Which wireless modules is the TX2400-FPC-2509 compatible with?\u003c\/p\u003e\n\u003cp style=\"color: #555; margin: 0; font-size: 14px;\"\u003eA: The TX2400-FPC-2509 uses a standard IPEX-1 (U.FL) connector with 50 Ω impedance, making it compatible with Espressif ESP32\/ESP8266, Nordic nRF52840\/nRF52833, Silicon Labs EFR32MG21\/MG24, Texas Instruments CC2652R\/CC1352, and any 2.4 GHz module with a U.FL antenna port. No external impedance matching network is required.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 20px; padding: 15px; background: #fafafa; border-radius: 8px;\"\u003e\n\u003cp style=\"font-weight: bold; margin-bottom: 6px;\"\u003eQ: The VSWR is 2.22 at 2.4 GHz — is this acceptable for WiFi and Bluetooth?\u003c\/p\u003e\n\u003cp style=\"color: #555; margin: 0; font-size: 14px;\"\u003eA: A VSWR of 2.22 corresponds to a return loss of approximately 7.7 dB, meaning about 17% of transmitted power is reflected. For short-range applications (smart home, BLE sensors within 10–20 m), this is generally acceptable. For maximum range, the antenna performs best at 2.5 GHz (VSWR 1.47, return loss ~14 dB). If your application is centered at 2.45 GHz, consider the TX2400-FPC3-5015 which achieves VSWR 1.18 at 2.45 GHz.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 20px; padding: 15px; background: #fafafa; border-radius: 8px;\"\u003e\n\u003cp style=\"font-weight: bold; margin-bottom: 6px;\"\u003eQ: How should the antenna be positioned inside the device for best performance?\u003c\/p\u003e\n\u003cp style=\"color: #555; margin: 0; font-size: 14px;\"\u003eA: Adhere the FPC element to the inner surface of a non-metallic (ABS, PC, or nylon) enclosure wall, maintaining at least 3–5 mm clearance from PCB ground planes, metal shields, and battery cells. Orient the antenna vertically for maximum omnidirectional coverage in the horizontal plane. Avoid routing the 100 mm feeder cable parallel to the FPC element to prevent coupling-induced VSWR degradation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 20px; padding: 15px; background: #fafafa; border-radius: 8px;\"\u003e\n\u003cp style=\"font-weight: bold; margin-bottom: 6px;\"\u003eQ: What is the operating temperature range and environmental suitability?\u003c\/p\u003e\n\u003cp style=\"color: #555; margin: 0; font-size: 14px;\"\u003eA: The TX2400-FPC-2509 is rated for −40 °C to +85 °C, suitable for indoor consumer electronics, smart home devices, and light industrial sensor applications. The FPC substrate is RoHS-compliant. For high-humidity or outdoor deployments, apply conformal coating over the FPC radiating element or house it inside a sealed IP-rated enclosure to prevent moisture-induced frequency detuning.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"padding: 15px; background: #fafafa; border-radius: 8px;\"\u003e\n\u003cp style=\"font-weight: bold; margin-bottom: 6px;\"\u003eQ: Can the 100 mm feeder cable length be customized for OEM production?\u003c\/p\u003e\n\u003cp style=\"color: #555; margin: 0; font-size: 14px;\"\u003eA: Yes. The standard feeder is 100 mm coaxial cable. Custom lengths are available for OEM orders — shorter cables reduce insertion loss, while cables up to ~200 mm add approximately 0.3–0.5 dB additional loss at 2.4 GHz. Contact our sales team with your target cable length, connector type, and order quantity for a custom quotation and lead time.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e","brand":"cdsenet","offers":[{"title":"Default Title","offer_id":45204213596262,"sku":"tx2400-fpc-2509","price":0.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0702\/9918\/9350\/files\/TX2400-FPC3-2509-_1_800x800_v2.jpg?v=1774593089","url":"https:\/\/cdsenet.store\/products\/tx2400-fpc-2509-2-4ghz-fpc-antenna-2-0-dbi-ipex-1","provider":"CDSENET, Built for the Wireless World","version":"1.0","type":"link"}