Kavit Anti-Drone System

KJ2000AD –

Kavit Anti-Drone System

Datasheet revision 1. 0

Kavit Electronics Industries Ltd.

Introduction:

In recent years, the availability of commercial drones made it a preferred tool used by terrorists and criminals for various illegal activities: from a cheap delivery system for bombs to prisons drugs smuggling delivery system.

Kavit, which has a long tradition of designing jammers for various purposes and clients, responded to this threat with the KJ2000AD Anti drone system. This system is composed of the following parts:

1. Jammers module

2. Rotator for camera and jammer module's antennas

3. Radar for detecting drones

4. Day/night camera for verifying that the radar target is a drone

5. Control and monitor

Each part is described more thoroughly under below.

Jammers Module:

The jammer module has the ability to quickly generate a high power noise in a factory pre-defined bands that are needed to be blocked.

The method of generating the spectral noise is by a combination of PLL + DDS chips, for each band.

The peak power in each band ranges from 30W-100W (according to the band and the client needs), and it is determined in factory.

The following bands are the basic offering:

Band [MHz]	Maximum output power [W]
433-435
902-928
1570-1620
2400-2485
5150-5850

Options that can be added to each transmitter (band):

1. Remote attenuation of its output power.

2. Temperature sensor of the power amplifier + programmable threshold alert.

3. Reverse RF power sensor + programmable threshold alert.

Kavit can also offer to add/remove bands and to change the maximum output power according to the client request.

Jammers module specification:

Output Power	Total 280W±1dB @ Connectors (i. e. Before Adding Antenna Gain)
Case Type	19” Rack Metallic / Suitcase Pelican 1650
Signal Source	PLL Synthesized + DDS
Modulation	Complex Wideband Sweep [with Special Noise Exciter]
General Control Circuitry	Micro-Controller (Processor) including NVM (Non-Volatile Memory), along with a PLL synthesis +DDS. Excellent Internal Protection Mechanism Against Software Malfunction
Interface	RJ45
Connector	N-Type
Feeding Inputs	110/220VAC

Rotator for camera and jammer module antennas:

This subsystem allows to achieve flexibility that fixed antenna can't provide, as it allows to use directional antennas and focus most of the jammers energy toward the receivers on the drone (which position is constantly changing in the sky), and not elsewhere.

This sub system also rotates the camera, in order to focus its field of view to the location of the drone as acquired by the radar.

According to the client needs, a 1D or 2D rotating system can be provided.

Radar for detecting drones:

The radar is the first sub system of the KJ2000AD that detects, track and identify drones. Its antennas are separated from the jammers modules ones. It uses electronic scan instead of mechanical rotation of its antennas. Once it detects a flying object, in a client programmable sector, then it reports them to the control PC.

Radar specifications:

Maximum detection range	Adaptive, up to 3km for drones (RCS ≥ 0. 1m²)
Range resolution	Adjustable up to 1m
Angular resolution	< 4° in azimuth < 1° in elevation
Angular coverage	Azimuth: 0° - 360° continuous Elevation: -5° to 85°
Angular positioning accuracy	±1°
Side lobes level	< 30dB
Frequency	9. 4GHz ± 100MHz
Transmit power	10W Maximum
Modulation	FMCW – Frequency Modulated Continuous Wave
PRF	Adjustable, 1 to 20KHz
Scanning speed	Adaptive, maximum of 40 RPM
Minimum range	Adaptive, 5% maximum range down to 15m
Power consumption	215W

Day/night camera:

After the radar acquired a target with small enough RCS and speed, the PC rotates the camera toward the detected object, in order to verify it is a drone.

The camera is actually a combination of 2 cameras: a day camera and a night (IR) one. These cameras are also able to track the target.

Day camera specifications:

Type	Day camera, 1/3" CCD
Total pixels	1280 X 720
Optical zoom	X33 motorized
Lens	10mm – 330mm, HD
FOV	WFOV 34. 9° / NFOV 1. 1°

Night camera specifications:

Type	Thermal camera, cooled system
Spectral range	3-5µm
Pixel size	15µm
Resolution	640 X 512
Lens	700mm
FOV	WFOV 34. 9° / NFOV 1. 1°

Monitor and control:

The monitor and control is the heart of the KJ2000AD solution.

It is a PC or laptop that receives information from the sensors (rotator, radar, camera), gets status reports from all of the sub systems (rotator, radar, camera, jammers), configure the sub systems (rotator, radar, camera, jammers), and implement the logic that turn on and off the jammers modules, according to the reports from the radar and the camera.

Once a new target is acquired by the radar, the PC orders the camera to look at the target (proper orders are given to the rotator in order to make the camera look at the object) and try to verify if it is a drone. Once drone identification is made with the camera too, then the PC orders the jammer modules to work and block the receivers on the drone for a programmable time or until the radar stop tracking the drone.

Another important job of this system is to provide a support for GUI/GUIs for the client, so all the sub systems information is available to the client, and can also can be controlled by him/her + generating and storing of system logs.

The basic Kavit offer is a local GUI which is located on the monitor and control PC, but it can be upgraded to a remote GUI (via TLS secured TCP/IP), in order to provide remote control and monitor of multiple KJ2000AD systems.

A local GUI provides visual information from the radar and from the camera, as well as report about the status of the rotator and the jammer modules.

Once it detects a drone, the local GUI provides a unique visual and/or audio alert to the user. The user is able to configure the system to either automatically or manually activation of the jammers.

Remote GUIs only, have the extra ability to monitor and control many KJ2000AD systems, in such a way that each appears as an icon, and the user can open any of them and get the full information, as described in the previous paragraph for the local GUIs.