EW effectiveness is determined not only by power or the number of modules but by how uniformly the area of use is covered. Even with modern systems, there remain areas where the signal is not jammed or works unstably. It is these areas that become ‘dead zones’.
In real conditions, dead zones arise not from a lack of equipment but from mistakes in placement, coverage geometry, and interaction between modules. A drone does not necessarily fly through the strongest part of the system — it finds the weakest spot.
Why EW Dead Zones Occur When Deploying Systems
Dead zones occur when the EW signal does not reach a certain area or its level is insufficient to suppress the drone’s channels. This can be related to terrain, obstacles, or incorrect placement of modules.
In the field, even minor elevation changes, buildings, or equipment can create shadow zones where the signal weakens sharply. In such places the drone retains control and passes through the defense.
The second cause is incorrect power distribution. If the modules are concentrated in one point, they create strong coverage locally but leave directions unprotected. The third factor is the lack of coordination between modules.
If they work without coordination, the coverage zones may not overlap, forming gaps. In practice, dead zones are not a coincidence but the result of specific mistakes in building the system.
EW System Coverage and EW Coverage Geometry in the Field
EW coverage is not a circle around the module but a complex shape that depends on the antennas, terrain, and obstacles. In open terrain the signal propagates more evenly, whereas in built-up areas or complex terrain gaps appear.
Coverage geometry determines exactly how the signal is distributed in space. If the modules are positioned without taking this into account, even a powerful system can have areas of low effectiveness.
In practice it is important not only to achieve maximum range but to ensure stable coverage within the working zone. This means that each area must be within the influence of at least one, and preferably several, modules. It is geometry, not nominal specifications, that determines the system’s real effectiveness.
To understand typical mistakes when installing systems, see the article: «Typical mistakes when installing EW at positions», which covers the practical aspects of deployment.
How to Avoid EW Dead Zones: Placement and Distribution of EW Modules
Avoiding dead zones begins with the correct placement of modules. They must be positioned to cover not only the center of the zone but also the directions of possible drone approach.
A key principle is zone overlap. If one module creates coverage, another must partially duplicate it. This avoids a situation where a small shift of the drone in space takes it out from under the EW’s influence.
Position planning must take into account the terrain, installation height, and the presence of obstacles. In the field this means that modules cannot simply be spaced evenly — they must be placed with the specific terrain in mind.
Optimizing placement also involves a balance between the number of modules and their distribution. An excess in one point does not compensate for a lack of coverage in another.
Modular EW Systems and Coordination of EW Systems in a Single Architecture
Modular EW systems make it possible to flexibly change the coverage configuration. Each module can perform a separate function, and together they form a single defense system.
A key factor is coordination. The modules must work in concert so that their coverage zones not only do not conflict but also complement each other. In practice this means managing operating modes, frequencies, and directions of impact. Without this, even well-placed modules can create uneven coverage.
For tasks that require scalability and adaptation to different scenarios, it is advisable to use solutions such as the modular «Hrets XL» EW system, which makes it possible to build a system that accounts for the specific geometry of the position and to provide uniform coverage without critical gaps.
Typical Mistakes in Deploying EW Systems That Create Dead Zones
One of the most common mistakes is focusing only on signal range without taking its distribution into account. As a result, the system has a ‘strong center’ and weak edges. The second is the lack of zone overlap. If the modules work separately, any gap between them becomes a potential passage point.
The third is ignoring the terrain. Even small obstacles can create significant gaps in coverage. The fourth is the lack of verification after deployment. Without testing in real conditions, dead zones go unnoticed. These mistakes are not related to equipment quality — they arise at the planning and placement stage.
Conclusions
Dead zones in EW are not a technical inevitability but the result of incorrect deployment and the absence of a systemic approach. They arise where coverage geometry, terrain, and interaction between modules are not taken into account.
An effective system is built not around individual devices but around control of space. Zone overlap, correct placement, and coordination of operation determine the result far more than the individual specifications of the equipment.