In modern warfare, EW is an “invisible shield and sword.” When we talk about antennas for UAV suppression or communications jamming, the key question is how we want to distribute the jamming energy. Do we need to create a protective zone around ourselves — a “dome” — or do we want to “burn through” the communication link of a specific drone at a distance of several kilometers? Let’s break down how real electronic warfare suppression tools work.
Omnidirectional Antennas: Which Is Best?
The main purpose of omnidirectional antennas in EW is to protect an asset from all sides without requiring aiming. However, the shape of that protection differs dramatically depending on the antenna type.
EW deployment scenarios:
● Vehicle-mounted EW: installed on armored vehicles or cars to create a protective perimeter against FPV drones.
● Trench EW: protection of a specific position or bunker from drops and kamikaze drones approaching from any direction.
● Portable systems (backpacks): individual protection for a soldier on the move.
Quadrifilar Antenna
The quadrifilar antenna is the gold standard for creating a protective hemisphere.
Radiation pattern: Unlike many other antennas, it radiates energy upward, covering the zenith.
Polarization: Circular polarization (CP) makes it ideal for countering drones that constantly change orientation in space.
Cloverleaf Antenna
This antenna gets its name from its characteristic petal shape.
Особливість: Вона компактна і забезпечує відмінну кругову поляризацію.
Feature: It is compact and provides excellent circular polarization.
Application: It is most often used in mobile EW systems and on drones themselves. It provides even coverage around itself, but has a lower gain than quadrifilar antennas.
Collinear Antenna (Omnidirectional).
This is the most common type of “stick” antenna, often mistakenly referred to as a dome antenna.
Fact: A collinear antenna is not a dome — it is a “donut.” It focuses energy low above the horizon.
Main drawback: Directly above the antenna, in the zenith, radiation is practically absent. If a drone approaches the asset vertically from above in a dive, it passes through this blind zone without any interference.
Directional Antennas: Precision and Range
When a signal must be suppressed at long distance, energy cannot be spread across 360°. It must be focused.
EW deployment scenarios:
● Anti-drone rifles: The operator sees the drone and points a narrow jamming beam at it, “blinding” it at long range.
● Fixed EW positions: When the direction from which hostile UAVs most often approach is known.
● Suppression of navigation channels (GPS/GLONASS): Focusing the signal toward the horizon to cut off satellite signals.
Patch Antennas
These are flat, compact radiators that have become the foundation of modern anti-drone rifles.
Advantages: High efficiency with compact dimensions. Patch antennas are easy to install on portable devices.
Polarization: They can be either linearly polarized or circularly polarized (the latter being better for EW).
Log-Periodic Dipole Antenna (LPDA)
If you see an antenna that looks like a “fir tree” or a fish skeleton, it is a log-periodic antenna.
Wideband capability: This is its main superpower. It can operate across a very wide frequency range (for example, from 400 MHz to 6 GHz).
Application: Ideal for SIGINT and EW systems when it is necessary to suppress several different communication channels simultaneously using a single antenna.
Horn Antenna
It looks like a metal funnel. From a radio physics standpoint, this is the “cleanest” type of antenna.
Power handling: Horn antennas are used where extremely high power (kilowatts) must be delivered — power levels that a patch antenna simply cannot withstand and would burn out under.
Directionality: It has a very narrow beam, which makes it possible to engage targets at extreme distances.
Conclusion: How to Avoid Making the Wrong Choice of Antenna for EW
Choosing an antenna for electronic warfare is always a search for compromise between range, coverage area, and mobility. Successful suppression of hostile UAVs depends 50% on module power and another 50% on how correctly the antenna distributes that power in space.
If you are not sure which type of antenna is right for your tasks, or if you have doubts about equipment compatibility, do not risk the effectiveness of your protection. Contact our managers at 3AVADA: they will help analyze your needs, take operating conditions into account, and help you select the right technical solution to ensure maximum safety.
Remember: there is no universal antenna that can do everything. Effective EW is always a comprehensive approach, where each antenna type covers its own sector and its own threat scenario. Understanding radiation patterns and the physics of wave propagation is what ultimately saves equipment and lives.
