Quadrifilar (Dome) Antenna for REB_GUARD EW Jammers

Quadrifilar (dome) antennas from the manufacturer REB_GUARD are specialized solutions for electronic warfare (EW) jammers, designed for detecting, scanning, and suppressing unmanned aerial vehicle (UAV) signals. They combine a compact design, an omnidirectional radiation pattern, and circular polarization, making them effective in working with modern drone control and navigation channels.

Design Features

• 1. Spiral Structure: Four conductors twisted into a spiral shape ensure stable antenna operation.
• 2. Polarization: Circular polarization (primarily right-hand, RHCP) allows for adjusting operation with drone signals regardless of their orientation.
• 3. Wide Coverage Angle: A nearly spherical (quasi-spherical) radiation pattern guarantees 360° coverage without blind spots.
• 4. High Sensitivity: The antenna provides quality reception and transmission over significant distances while maintaining a moderate standing wave ratio (SWR).

Operating Principle

The quadrifilar antenna is optimized for use in EW systems: thanks to circular polarization, it effectively interacts with UAV signals, and its omnidirectionality allows for detecting and suppressing signal sources regardless of the drone's spatial orientation.

Application in Anti-UAV EW

• 1. Control Signal Suppression: Blocks drone control channels in operational frequency bands.
• 2. GPS/GLONASS Navigation Suppression: Wide coverage allows for creating interference on satellite frequencies.
• 3. UAV Detection: Used for early detection and identification of drone radio signal sources.
• 4. Versatility: Suitable for stationary, mobile, and portable solutions.

Advantages of Quadrifilar Antennas in EW

• Omnidirectionality: Coverage in all directions minimizes blind spots.
• Interference Immunity: Circular polarization reduces the impact of multipath propagation.
• Compactness: Ability to integrate into portable and mobile EW systems.
• Frequency Versatility: Antennas are effective in various operating bands used by UAVs.
• Reliability in Field Conditions: Resistance to vibrations, temperature fluctuations, and moisture exposure.

Disadvantages

• Higher Cost: More complex design compared to whip or directional antennas.
• Reduced Efficiency at Band Edges: Efficiency may decrease with significant frequency deviations outside the operating range.

Example of Use

• 1. On Mobile EW Complexes: For blocking drone control channels in open areas.
• 2. In Stationary Systems: Protection of critical infrastructure — military bases, power plants, government facilities.
• 3. In Portable Devices: Used by units for protection during operations.

REB_GUARD quadrifilar antennas are an indispensable element of modern EW systems. Their versatility, circular polarization, and quasi-spherical radiation pattern allow for creating reliable protection for personnel and equipment against threats in the radio frequency spectrum. The antenna is compatible with EW jammers and electronic protection systems, manufactured in Ukraine, and comes with a 12-month warranty.

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