Bidirectional dual-frequency transceiver module with different frequencies for uplink and downlink

Bidirectional dual-frequency transceiver module with different frequencies for uplink and downlink
Bidirectional dual-frequency transceiver module with different frequencies for uplink and downlink

Bidirectional dual-frequency transceiver module with different frequencies for uplink and downlink

Mini COFDM Wireless Ethernet Transmission Module (100Mbps RJ45) – UDP Video Data Transmitter & Receiver

Introduction

The Mini COFDM Wireless Ethernet Transmission Module is a high-performance, broadband digital video and data transceiver designed for UDP/IP camera streaming and other Ethernet-based data applications. Both transmitter and receiver modules feature RJ45 network interfaces and UART control ports, providing a flexible, reliable, and fully transparent data transmission solution.

This module supports FDD (Frequency Division Duplex) operation, allowing separate frequencies for uplink and downlink. It is ideal for applications requiring real-time video streaming, IP data transmission, or relay functionality in complex environments such as UAV drones, industrial monitoring, or remote control systems.

Key Features

  • High-Speed Ethernet Transmission: Supports full-duplex 100Mbps Ethernet with TCP/IP and UDP/IP protocols, including point-to-point and point-to-multipoint connections.
  • Flexible Frequency Configuration: Default FDD frequencies 340 MHz (uplink) and 590 MHz (downlink), adjustable from 170 MHz to 860 MHz. Supports remote frequency modification via UART without power cycling.
  • COFDM Technology: Delivers robust wireless transmission with high anti-interference capability, ideal for urban or obstructed environments.
  • Adjustable Bandwidth: 2–8 MHz, adjustable in 100 kHz steps, providing flexible trade-offs between data rate and range.
  • Low Power & Compact Design: 70mm × 50mm × 20mm, operating at 12V with 200–300 mA current consumption.
  • RF Performance: Low spurious emissions, adjustable output power with attenuation from 0–15 dB.
  • Advanced Modulation & Error Correction: Supports QPSK, 16QAM, 64QAM with IFFT 2k, guard intervals (1/4, 1/8, 1/16, 1/32), and FEC rates (1/2, 2/3, 3/4, 5/6, 7/8).
  • 128-Bit Encryption: Ensures secure data transmission with compatible decryption boards.
  • Dual RF Antennas: Supports simultaneous two-way transmission for uplink and downlink with bandpass filtering to avoid interference.
  • Expandable Functionality: Can serve as a repeater or relay module to extend transmission range or overcome obstacles.

Applications

  • UAV/drone video data transmission
  • Ground-to-air IP video links
  • Industrial remote monitoring
  • Wireless relay or repeater stations for digital video networks
  • Real-time IP camera streaming

Technical Specifications

  • Voltage: 6–20V DC (recommended 12V)
  • Current: 200–300 mA
  • Frequency Range: 50 MHz–2.5 GHz (TX), 158 MHz–860 MHz (RX)
  • RF Output Power: Adjustable, peak -15 ±3 dBm
  • Interface: RJ45 Ethernet, RS232 UART
  • Encryption: 128-bit
  • Dimensions: 70 × 50 × 20 mm
  • Bandwidth: 2–8 MHz (100 kHz step)
  • Modulation: QPSK, 16QAM, 64QAM
  • FEC: 1/2, 2/3, 3/4, 5/6, 7/8
  • Guard Interval: 1/4, 1/8, 1/16, 1/32

Customization Options

  • Working Frequency Range – Adjustable uplink and downlink frequencies (170 MHz to 6 GHz) depending on customer needs.
  • Output Power / Power Amplifier – Optional PA modules: 1W, 2W, 5W, 10W, 20W, or 50W.
  • Bandwidth – Configurable from 2 MHz to 8 MHz in 100 kHz steps.
  • Modulation & FEC Settings – Options for QPSK, 16QAM, 64QAM, and different FEC ratios.
  • Encryption – 128-bit encryption can be enabled or customized with dedicated decryption boards.
  • Connector & Interface – RJ45, RS232, or customized I/O ports.
  • Filters & Converters – Band-pass filters or frequency down converters can be added for specific ranges.
  • Housing & Mechanical Design – Options for bare-board, metal enclosure, or ruggedized casing.
  • Antenna Type – Different antennas available for specific frequencies and applications.
  • Relay/Repeater Mode – Custom setup for one-way, two-way, or repeater operation.

Why Choose This Module?

  1. Versatile & Scalable: Supports multiple configurations and network setups, ideal for UAVs, remote monitoring, and industrial applications.
  2. Reliable Transmission: COFDM FDD technology ensures robust performance in high-interference and obstacle-rich environments.
  3. Customizable & Secure: Adjustable frequency, bandwidth, and 128-bit encryption enable tailored, secure solutions for professional deployments.

What It Does

This module allows full-duplex wireless transmission of Ethernet data and IP video streams. When paired with another module, it can form a complete uplink/downlink pair with customizable frequencies. It is widely used in drone communications, ground control stations, and as a digital video repeater to extend signal range or overcome obstacles such as buildings or mountains.

Application Scenarios

The Mini COFDM wireless Ethernet transmission module is designed for reliable, low-latency IP data and video communication in challenging environments. Typical applications include:

  1. UAV / Drone Communication – Real-time video streaming from onboard IP cameras to ground stations, telemetry data transmission, and secure command & control links. Its strong anti-interference capability and long-range performance make it ideal for drone surveillance, mapping, inspection, and search-and-rescue missions.
  2. Industrial Monitoring – Wireless transmission of IP camera data in factories, oil fields, power plants, and mining sites where wired connections are difficult.
  3. Security & Law Enforcement – Mobile surveillance, body-worn video transmission, and rapid deployment monitoring systems.
  4. Broadcast & Media – Live event coverage, outdoor video relay, and temporary communication setups.
  5. Relay / Repeater Networks – Used as a COFDM repeater to overcome obstacles such as mountains or buildings, extending the effective communication range.

In UAV applications, the module’s FDD dual-frequency design ensures separate uplink and downlink channels, enabling stable two-way data transmission even under interference. This ensures that drones can maintain control and video feedback during long-distance or complex flight operations.

Customer’s Review

I’ve been using the Mini COFDM wireless Ethernet transmission module for my drone video projects, and the performance has exceeded expectations. The video stream is stable, with very low latency, even in areas with interference. I especially like the flexibility of frequency customization and the secure 128-bit encryption, which gives me confidence in critical operations. Its compact size and low power consumption make it perfect for UAV integration. Overall, this module has greatly improved the reliability of my long-range video and data transmission.