... designed for all wireless communications and mostly cellular bands (GSM850, GSM900, GSM1800, GSM1900, iDEN, NEXTEL, TDMA, AMPS, CDMA, NMT, DCS, PHS, PCS, 3G, UMTS, etc.)... Cellular telephones and other requested communication devices (Radio-Communications, Wi-Fi, GPS, Satellite Phones etc.) located in the protected area cannot transmit or receive. Devices located outside the area will have regular services and will not be affected by the PRO Jammer. Unlike Kavit's State of the Art Digital Jammers, competitive products on the market may suffer from serious problems of stability and reliability.

Kavit's battle-proven products are used by the most demanding forces & agencies worldwide.

Typical Applications (Security: RC-IED / ECM / EOD / VIP / Anti-Eavesdropping & Anti-Communication, Safety, Privacy, Acoustic Isolation):

RCIEDs (Remote Controlled Improvised Electronic Devices) are widely used by terrorists worldwide, and have been causing a large number of casualties, especially to the US forces in IRAQ.

A typical RCIED is composed of a large bomb, activated by an attached cellular phone. After installing the RCIED in a main roadside, the terrorist can dial it from everywhere, and at any time, in order to activate it. Of course he'll do do it once a large military convoy or vehicles pass by or near the bomb, for getting the maximal number of casualties.

By accurate & effective operation, the Kavit PRO Jammers cut off the RC triggering transmissions to the RCIED receiver, thus immediately preventing bomb denotation, and save life, sometimes of many.

If you want the best for your Army, equip it with Kavit Professional Jammers.

The PRO Jammers are vital for Defense Forces (Military Convoys, Vehicles, Soldiers) as well as for Security Forces protecting VIP & Conference, Special Forces fighting terrorists, Army, Air Force, Navy, Warships, Local NATO/UN forces, LE (Law Enforcement) Agencies, Police, EOD (Explosive Ordnance Disposal) Teams [operators & robots], Bomb Squads, SWAT Teams, Riot Control, Negotiation / Elite / Special response / Anti-terror / Anti-drug Units, Ministry of Defense, Ministry of Interior, Governmental agencies, Airports, Railways, Manufacturers of Armored Vehicles, etc.

Additional major security applications include Prisons Facilities, Information Security, i.e. prevention of information leaks due to bugging e.g. using cellular phones, Government & Military Sensitive Installations / Bases / Headquarters, Buildings, Briefing / Interrogation / Investigation / Secret / Conference / Board / Examination Rooms & Classes, Customs, Court Houses, Department of Special Investigations, Financial Institutions, Banks, Money Changers, Cash Transfer Vehicles, Embassies, Sensitive Locations e.g. Energy & Petrochemical [Oil & Gas] Facilities, Industrial / Power Plants, Aircraft, Hospitals, Health Centers, Medical Clinics, etc.

The use of jammers for Commercial or Civil applications is prohibited in many countries, and hence on the responsibility of the end-user and/or buyer. Governmental entities usually don't have an issue to purchase PRO Jammers for security purposes.

Commercial Applications (Privacy, Acoustic Isolation, Anti-copying) include: Hotels, Exclusive Restaurants, Universities, Colleges, Schools, Classes, Conferences, Boardrooms, Libraries, Lecture Halls, Cinemas, Theaters, Museums, Concert Halls, Art Galleries, Recording Studios, Places of worship: Synagogues / Mosques / Temples / Churches, etc.

Download Brochure! English / Español

Download Datasheet for Compact Cellular-RF Jammer (June 28, 2007)

Available Options:

* RF Output Power (per band): 1W / 15W / 30W / 50W / 100W / 300W / 500W etc.
* User Programmable Power Attenuation
* Internal and/or External Hot-Swap Rechargeable Battery
* Operation from an External 12V Battery [e.g. of the Military Vehicle]
* Mobile Pelican Case (trolley-style & rugged) or 'Fixed' Metal Case [for 19" Rack]
* Internal High Gain Directional Panel Antennas
* External High Gain Omni-Directional (360°) Antennas or Directional (Yagi / Panel / Long Periodic)
* Coverage: Cellular communications (e.g. GSM, CDMA, iDEN, AMPS, TDMA, PHS, UMTS etc.) and other requested wireless & radio communications equipment (HF, VHF, UHF, Satellite Phones, etc.)

Broadband Jammer, is it really a good solution ?

Bomb Jammers are destined to provide a security coverage to the frequencies ranges that believed to be potential threats in a given target arena.

A typical example of a broadband jammer specifies "20-3000 MHz" with a total power of "1500W".

For customers who are not familiar in jamming systems it sounds fine: a solution that takes large resources, but apparently covers a large frequency range, and with a good power. What's more, that it might come with some friendly programming software that allows to set communication holes.

Unfortunately, the reality is totally far from what we would like it to be. Practically, in addition to being extremely ineffective & resources hungry (weight, size, cost), its overall security might be lower compared to a jammer that well covers only the popular frequency bands e.g. of cellular phones.

Today's existing technologies for a broadband jamming solution are very poor: they require vast power generator & active cooling systems, and regardless of their declared powers, depending on the frequency band, they effectively transmit to the air only medium to insignificant jamming signals.

The following facts will clarify why it is so important to use a jammer, which was pre-designed to support only the most vital & narrowest frequency ranges, that are required for your application.

Lowest average power: the total jamming power is apparently divided over a large total bandwidth. This causes each frequency point to get a significantly lower average power. In the above example, the average power per frequency point would be: 1500W / (3000-20) MHz = ~0.5W per MHz.

For a comparison, a jammer which covers only cellular bands with 100W per cellular band has an average power per frequency point of 100W / (average cellular bandwidth 55.5MHz) = ~1.8W per MHz, which is over 3 times higher than that of a typical broadband jammer. Kindly notice that a compact cellular jammer with 30W+ per band will also achieve a higher value than that of broadband.

Lowest average gain: the antenna's gain virtually determines which portion of the (average or specified) power will be transmitted to the air. This is the real (effective) jamming energy. The average antennas' gain of all the broadband jammers (regardless of the vendor) is extremely low.

Manufacturers of broadband jammers trick the customers by specifying the antenna gain at its center frequency point, where it's at its highest value. The gain however is reduced dramatically from the center frequency, in both the directions. Hence, in order to have some minimal average gain, a broadband jammer must use as many antennas as possible, what naturally causes a negative interaction among the antennas, and consequentially reduced gain. Furthermore, the antennas must be small to be wind-proof. The direct meaning is that, depending on the specific frequency point, only a very small portion of the average or specified jamming power of broadband jammers is transmitted to the air. Hence, the declared power specifications of broadband jammers are virtually meaningless.

With reference to the above example, it means that the ratio will even be well larger than the above value, as the average gain of the antennas over a bandwidth of 20-3000MHz is extremely lower.

Remember that the frequencies spectrum is unlimited - the 'smart bad guys' buy and make TX-RX devices which operate at non standard frequencies (or outside the range of jammers e.g. below 10MHz or above 10GHz). Unfortunately No electronic jammer can fight it. Moreover, they may also use a high power TX for existing frequencies, which are not jammed well by broadband jammers.

The conclusion is that jammers are destined only for the 'normal bad guys', who buy popular available devices, mainly cellular telephones, sometimes also VHF or UHF radios. Therefore, at this time, Kavit recommends to use its PRO Jammers with an optimal coverage for the popular bands of cellular telephones & radio communications. For updated product details please download the datasheet.

KAVIT is able to quickly provide you with the most professional and cost effective solutions for ANY requirements of jamming systems.

What about FCC or CE ?

Jammers (of any kind, any vendor) can never pass any such or similar standard. If any vendor claims to have FCC/CE for its jammer, we'll be happy to hear about the model and its certification number.

Cellular Activity Detection & Responsive Jammers

In theory, it could be ideal (e.g. in terms of longer operation time on [vehicle] batteries) if the jammer could be responsive, and operate for certain programmable period (for example 5 minutes) whenever a cellular activity detection occurs. However, for security purposes, it mustn't be used.

Regardless of the model or vendor, once a jammer is switched on, it takes time (around 10 seconds) until the cellular phone becomes disabled. This period is more than enough to complete the activation of RCIED bombs, from the moment it started (what caused the cellular activity detection).

Similarly, in case of prisons, a prisoner can send SMS message [or even make a shortest call] whenever the programmable jamming time expires.

About coverage range...

Some competitor specifies jamming (coverage) radius, which practically can Never be achieved. The simple fact is that the main factors that affect on the jamming (coverage) radius are the output power of the unit, antenna type and gain, the type and model of the cellphone, and the received cellular signal strength at the specific location (where the jammer is to be located). For example, if the cellphone is located near a cellular base station, it will receive high cellular signals (i.e. high RSSI), what will reduce the jamming range. Therefore these specifications are meaningless.

Examples of typical coverage ranges for several models...

Typical jamming radius in meters using: a standard 360° (Omni-Directional) Antenna / 45° Directional Panel Antenna / 30° Directional Yagi Antenna / High-Gain 360° Antenna / Highest-Gain 360° Antenna:

LP (Low Power) series of 1W+ (per band) Digital Jammers: ~10-30m



HP (High Power) series of 15W (per band) Digital Jammers: ~25-75m / ~60-185m / ~90-300m / ~50-150m / ~60-245m



HP (High Power) series of 30W (per band) Digital Jammers: ~35-100m / ~80-250m / ~120-400m / ~70-200 / 100-350m



This series has a special option of Monitoring System. This option allows monitoring of many such units from a central place (using a user-friendly PC software). This gives the ability to see if someone for instance has disconnected the power or an antenna of a certain jammer. Download the Logger System Info and Logger System Manual (Español: Logger info & Logger Manual).



Please don't hesitate to contact us, we will be happy to advise on the best solution for your applications.

Tel:  +972 39 52 35 40
Fax: +972 39 52 35 11
info@kavit.com
www.kavit.com