Digital COFDM FPV Relay Drone Repeater 170-860Mhz 5W PA long range Retransmitter

Extend your drone’s reach with our Digital COFDM FPV Relay – stable, long-range transmission anywhere.

Fly farther, see clearer – our COFDM FPV Relay ensures seamless, real-time video streaming.

Fly beyond line of sight – relay your FPV signal with zero interference.

Feature:

1. The operating frequency is customizable. Typical transmitters and receivers operate within a custom frequency range of 170-860 MHz.
2. The repeater’s transmit power is customizable—1, 2, 5, 10, or 20 watts—depending on how far you need to transmit.
3. Integrate a Band-Pass Filter or Helical Filter to allow only the operating frequency while blocking interference.
4. If you want to create a drone relayer yourself, we can also provide UAV repeater modules and technical support.

Specification:

1. Repeater Power Supply: 12V
2. Working Frequency 170-860Mhz can produce according to your demand.
3. Here is the recently frequency we can do for one cofdm relay /repeater.
   1. RX:350Mhz TX595Mhz
   2. RX:595Mhz-TX350Mhz
   3. RX:700Mhz-TX595Mhz
   4. RX:595Mhz-TX700Mhz
   5. RX:350Mhz-TX700Mhz.

Connection:

Removable Repeater Parameter Configuration Tool

Why you need a relay?

If you have the following needs, you can consider adding a relay.

1. Extended Transmission Range: The relay device receives the air transmitter’s source signal and retransmits it to the ground receiver, extending the reach of the signal.
2. Signal enhancement: The repeater receives and amplifies the signal before it attenuates, compensating for path loss, especially maintaining video quality when penetrating walls or encountering physical obstacles.
3. AES-128 end-to-end encryption: prevents video or data from being stolen during forwarding and ensures video privacy.

FAQ

Q1: Does the Helical Bandpass Filter have a direction and need power supply?

A1: Helical Bandpass Filter is a passive filter, usually composed of spiral inductors and capacitors, mainly used in RF and microwave circuits. Our Helical bandpass filters are symmetrical and non-directional.

A Digital COFDM FPV Relay Drone Repeater is a specialized drone-based communication system that extends the range and reliability of First-Person View (FPV) video transmission using COFDM (Coded Orthogonal Frequency Division Multiplexing) technology. Here’s a breakdown of its key features:

Key Components & Features:

1. COFDM Technology:

   • COFDM is an advanced modulation technique that provides resistant transmission against interference, multipath fading, and obstacles like buildings or mountains.

   • It allows stable, low-latency video and data transmission even in non-line-of-sight (NLOS) conditions.

2. FPV Relay Function:

   • Acts as a midpoint repeater to relay video and control signals from a drone, ground control, or another UAV.

   • Extends the communication range beyond normal limits, useful in urban environments, mountainous terrain, or remote areas.

3. Long-Distance Transmission:

   • Significantly increases video and data link coverage, making it ideal for surveillance, search and rescue, and military applications.

   • Some systems support up to 50-100 km or more in range.

4. Low Latency & High Definition (HD) Video:

   • Ensures real-time video streaming with minimal delay, which is crucial for drone operators needing a clear FPV feed.

5. Encryption & Secure Communication:

   • Many models offer AES-128 encryption for secure, interference-resistant transmissions.

6. Use Cases:

   • Police & Law Enforcement: Surveillance, Disaster Relief Communication, and Reconnaissance.

   • Search & Rescue: Provides communication in remote or disaster-hit areas.

   • Broadcasting: Live HD video relay for events, journalism, or filmmaking.

   • Industrial Inspections: Extends drone operations for large industrial sites, pipelines, or offshore rigs.

FAQ

Q1: I already purchased a 595 MHz FPV digital transmitter and receiver. How can I extend the transmission range using a retransmitter? What do I need to buy or configure?

A: To extend your transmission distance, you can add a video retransmitter (relay system). This device typically includes:

• One receiver module (to receive your original signal)
• One transmitter module (to retransmit the signal)

How it works:

• The retransmitter receives your existing signal at 595 MHz
• It then retransmits the signal at 350 MHz

What you need to do:

1. Purchase the retransmitter system (receiver + transmitter combo)
2. Ensure your existing setup:
   • Your original transmitter stays at 595 MHz
   • Your ground receiver must be reconfigured to 350 MHz
3. Replace antennas:
   • Your ground receiver must use 350 MHz antennas (not 595 MHz)
   • It is recommended to purchase two 350 MHz antennas for optimal diversity reception

About the band-pass filter:

• The retransmitter includes an external band-pass filter
• You can:
  • Test without the filter first
  • If there is no interference at 595 MHz or 350 MHz → filter may not be necessary
  • If you experience signal interference or noise → install the filter to improve signal quality

Q2: How do I install and deploy the retransmitter?

A: The retransmitter is designed for one-way video transmission and can be deployed flexibly depending on your mission needs.

Common installation options:

1. On a relay drone (airborne repeater):
   • Positioned between your FPV drone and the ground station
   • Ideal for:
     • Long-distance missions
     • Obstructed environments (mountains, urban areas)
2. On elevated terrain:
   • Mountain tops or hills
   • Provides strong line-of-sight coverage
3. On structures:
   • Rooftops
   • Towers or telescopic masts
4. Ground-based relay station:
   • Installed at a forward position
   • Operator can remain in a safe or concealed location

Additional Recommendations:

• Line of sight is critical:
  Always try to maintain clear, unobstructed paths between:
  • Transmitter → retransmitter
  • Retransmitter → receiver
• Power supply planning:
  Ensure the retransmitter has a stable power source, especially for long missions
• Antenna positioning:
  Use directional antennas where possible to maximize range and signal strength
• Frequency planning:
  Verify that 595 MHz and 350 MHz bands are legal and relatively interference-free in your operating area