MT7681 3dBi High-Gain WiFi Antenna for ESP8266 and Raspberry Pi Zero W – 2.4GHz Wireless Signal Booster with IPX to SMA-KY Connector

Product Description The MT7681 3dBi High Gain WiFi Antenna kit is an essential upgrade for wireless projects requiring extended range and superior signal stability. Operating in the 2.4GHz ISM band, this omnidirectional antenna significantly boosts the reception and transmission capabilities of modules like the ESP8266 (ESP-07), ESP32-WROOM-U, and Raspberry Pi Zero W. The kit includes a high-quality 15cm U.FL/IPEX to SMA-KY pigtail cable, allowing for easy panel mounting in custom enclosures. Whether you are building a long-range IoT gateway or an outdoor robotics controller, this antenna ensures a robust wireless link by reducing packet loss and overcoming minor physical obstructions.

Key Features

• Enhanced Signal Range: Provides a 3dBi gain boost, significantly improving WiFi coverage compared to standard PCB trace antennas.

• Complete Interface Kit: Includes the necessary IPX (U.FL) to SMA female bulkhead pigtail for professional-grade enclosure mounting.

• Universal 2.4GHz Support: Fully compatible with all WiFi standards (802.11 b/g/n) and Bluetooth modules operating in the 2.4GHz spectrum.

• Omnidirectional Radiation: Ensures consistent signal strength in all horizontal directions, making it ideal for mobile robotic platforms.

• Flexible Swivel Design: The antenna features a 90-degree tilt and 360-degree rotation hinge for optimized positioning and storage.

Technical Details

• Frequency Range: Optimized for the 2.4GHz to 2.5GHz band, covering all standard WiFi and Zigbee channels.

• VSWR Performance: Voltage Standing Wave Ratio of ≤1.5 ensures minimal signal reflection and maximum power transfer to the antenna.

• Pigtail Cable Construction: High-quality RG178 or 1.13mm coaxial cable ensures low attenuation over the 150mm length.

• Connector Integrity: Gold-plated IPEX (U.FL) connector provides a secure, low-resistance snap-fit connection to the wireless module.

• Input Impedance: Standardized 50 Ohm matching to prevent signal bounce and maintain transmitter efficiency.

• Radiation Pattern: Toroidal (doughnut-shaped) radiation pattern provides wide horizontal coverage with focused vertical gain.

• Housing Material: Ruggedized ABS plastic radome protects the internal copper radiating element from mechanical stress and dust.

• Mounting Versatility: The SMA-KY bulkhead connector includes a nut and washer for secure fastening to plastic or metal project boxes.

• High Sensitivity: Capable of picking up weak signals in noise-congested environments, improving link reliability.

• Power Handling: Rated to handle up to 50W of RF power, far exceeding the requirements of standard microcontrollers.

• Ground Plane Sensitivity: Designed to work efficiently even in compact setups without the need for a large external ground plane.

• Interface Standards: Compliant with standard SMA female (hole center) and SMA male (pin center) threading.

• Operating Temperature: Stable performance across a wide industrial range of -40°C to +85°C.

• Wireless Protocol Support: Ideal for ESP-07, ESP-32, CC2500, NRF24L01+ (PA/LNA version), and various u.FL equipped routers.

• Signal Polarization: Vertical polarization alignment is standard for most indoor and outdoor WiFi deployments.