Jamming (RE-)Made

Safer, Faster and Faster.

Jamming that works in the toughest of environments. Tested. Proven and reliable, against FPV and commercial UAV’s. Implemented. We prefer to let out equipment do the talking. No gimmicks. Only fantastic performance.

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Designed & Made in Europe, Poland
European Union Flag European Union
Republic of Poland flag Republic of Poland

Mission

To be a trusted and preferred provider of jamming solutions for the toughest of environments.

While we can go on about the 10 years of experience in the jamming field, PhD led team and implementations as a preferred developing partner for NATO and other forces, we know our role. We take it seriously as our solutions are designed to protect.

Our Adventages

Safer

Defender line of products is designed to keep the operators and the system away from each-other to ensure safety and comfort

Longer

Specially designed power supplied batteries ensure long lasting performance of up to 8 hours with a fully engaged system

Faster

Incredibly fast switching times between listening and sending ensure that all threats are dealt with efficiently and quickly

Stronger

Focused on smart power, the Defender line of products, uses all available power, channels it, to its maximum efficiency for range extension purposes

Clearer

Multifunctional software, specially designed and tested to ensure ease of use and ergonomically pleasant experience

Friendlier

Easy integration ready. Dedicated API and its implementation are all that are required to add the Defender line of jammers to any CUAS system

Our Jamming Solution

Jammer signal
Threat signal
User defined jamming range

Active

Diffused RF power
Reaction time: ContinuousDistance / power ratio: LowDistance: 1 kmTrigger: NonePrecision: All ranges

Semi - Reactive

Optimized RF power
Reaction time: 18 μsDistance / power ratio: MediumDistance: 1,5 kmTrigger: Threat detectionPrecision: Triggered ranges

Reactive

Precise RF power
Reaction time: 36 μsDistance / power ratio: HighDistance: 3 kmTrigger: Threat detectionPrecision: Triggered signals
Distance to power ratio can be increased by usage of Directional Antenna up to 5 km. Performance indicators are illustrative and apply to C1 class drones operating in accordance with EU standards and regulations with respected to frequency ranges and maximum permitted communications transmission power levels.

Defender Product Lineup

Defender jamming solutions were designed for the most demanding and toughest of environments. The Defender line of products, before any implementation, is field tested extensively to provide and ensure proven and reliable performance against Class 1 FPV and commercial UAVs, depending on the Defender jammer chosen.

Wideband Series

Ultra flexible and multi-purpose unit designed for the toughest tasks ranging from CUAV to cellular/mobile communication jamming. This is B4 Limit's flagship unit - the Swiss Knife of jamming. Capable, flexible and adaptable. Ready to use as a stand alone, fully synchronized with other units or as part of a bigger CUAS system.

Frequency coverage: 20 – 8000 MHz
Simultaneous bandwidth: 2250 MHz
Total power: 650 W
Defender Wideband WB6500

Manpack Series

Designed for the indoor or local outdoor use to neutralize immediate threats. Small design, optimized power characterize the manpack.

Full Band Coverage: 20 – 6000 MHz
Simultaneous bandwidth: 450 MHz
Total Power: 200 W
Defender Manpack MNB75T5G

Defender Stackable Series

Portable and stack-able full power system designed to treat the greatest threats with reliable and predictable power. The unit can be stacked, used individually or dispersed across the terrain allowing for greatest possible power across a man-portable platform.

Stackable version of the Manpack series
Capabilities can be extended by stacking additional Manpack modules
Scalable and interchangeable
Defender Antidrone 2.0

Accessories

While Defender Jamming products have been designed to offer the absolutely best possible performance, their performance is not possible without the use of best in class accessories which B4 Limits offers as part of the entire package or, when the use case calls for it, separately.

Jammer antenna

Antenna

Not all antennas are right for all jobs. Locally designed and tested antennas are available for UAV jamming but the system can efficiently be designed according to client requirements and needs.

Antenna mast

Mast

Variety of masts can be offered, from basic masts to pan-tilt equipped solutions. B4 Limits works with a number of manufactures to ensure that the offered products achieve their intended use in the most effective manner.

Jammer battery

Battery

B4 Designed batteries offer long lasting power and are optimized to work efficiently with the Defender line of products increasing the life operational life of the battery as well as that of the equipment.

Fiber-optic cable

Fiber-optic Cable

Externally provided equipment that has been implemented into the Defender jammer as a means of keeping a significant distance between the operator and the Defender line of jammers.

Leo

Jammer Control software

Dedicated Cockpit Software suite that includes basic as well as advanced software features for effective and efficient control of the Defender jammer via dedicated hierarchical user profiles with added features such as a basic spectrum analyzer.

Control multiple jammer devices
Jamming definition using encrypted profiles
Product integration
Leo application screenshot

Lemur

Training software

Training software, encompassing over 60 missions, for LEO software which is the digital backbone of our Defender line of Jamming products. Specially designed to offer a fast and safe learning environment for all future operators, including a classroom setting with testing.

Fully emulated leo playground available via web
Automated exercises without need for trainer
Lemur application screenshot

Company

B4 Limits was founded in 2019 following successful years of jamming development at another local company. With the founding of B4 Limits, the team first focused on developing jamming solutions for incarceration facilities with a number of successful implementations and followed this up with with the development of the CUAS dedicated Defender line of jamming products over 3 years of development culminating in the release of the current version of our flag ship platform. B4 Limits is committed to development of viable and proven solutions that are intended to perform where others have failed.