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Is directional antenna or omni-directional antenna suitable for conference room telephone jammer?

Is directional antenna or omni-directional antenna suitable for conference room telephone jammer?

  • 2022-08-02
In order not to be interrupted by the sudden ringing of the mobile phone during the meeting, or for the participants to concentrate on listening to the content of the meeting, and to prevent the disclosure of the content of the meeting, it is a very wise choice to use the telephone jammer.

The jammer suitable for use in the conference room is mainly divided into directional antenna and omni-directional antenna in the market at present. So when using the telephone jammer, choose directional antenna or omni-directional antenna. That kind of effect is better. To figure out this problem, let's first understand what directional antenna and omnidirectional antenna are.

The so-called omnidirectional antenna refers to the antenna that radiates and receives on the horizontal plane without maximum direction. Due to the directionality of radiation and reception, this kind of antenna is relatively convenient to install, and the antenna installation angle technology at the transmission point does not need to be considered. Omnidirectional antenna is generally used in the case of short distance and large coverage in telephone jammers, and it is cheap, and the gain is generally below 9dB. The radiation range of the omnidirectional antenna is more like the outline of an apple.

Directional antennas are generally used in telephone jammers in environments with long transmission distance, small coverage and high target density of shielded signals. The main radiation range of the directional antenna is like an irregular cone (or horn). We can also refer to the relationship between the omni-directional antenna and the directional antenna in this way. The omni-directional antenna will send signals in all directions, and the signals can be received from the front, rear, left and right. The directional antenna is like a bowl shaped reflector covered behind the antenna, and the signals can only be transmitted to the front. The signals that shoot to the back are blocked by the reflector and reflected to the front, strengthening the signal strength in the front.

From the above, we can see that during the use of the conference room, the telephone jammer is usually installed in the front and back of the conference room, which is more targeted. Therefore, when using the jammer in the conference room, the directional antenna can be used to concentrate the interference in the front direction to increase the interference distance.

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