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 content of the meeting from being leaked, it is a very wise choice to use a full-band jammer.
The jammers suitable for use in conference rooms are currently mainly divided into directional antennas and omnidirectional antennas in the market. Then, when using the jammers, choose a directional antenna or an omnidirectional antenna. That effect is better. To figure this out, let's first understand what a directional antenna and an omnidirectional antenna are.
The so-called omnidirectional antenna refers to the antenna that radiates and receives in the horizontal plane without the greatest direction. Since radiation and reception are non-directional, this type of antenna is more convenient to install and does not need to consider the antenna installation angle technology at the transmission point. Omnidirectional antennas are generally used in jammers when the distance is short and the coverage is large, and the price is cheap, and the gain is generally below 9dB. The radiation range of an omnidirectional antenna is more like the outline of an apple.
Directional antennas are generally used in signal jammer to shield the environment where the signal transmission distance is long, the coverage is small, and the target density is high. The main radiation range of the directional antenna is like a less regular cone (or horn). We can also refer to the relationship between the omnidirectional antenna and the directional antenna in this way. The omnidirectional antenna transmits signals in all directions, and can receive signals from front, back, left, and right. The directional antenna is like covering a bowl-shaped reflective surface behind the antenna. The signal can only be transmitted to the front, and the signal sent to the back is blocked by the reflective surface and reflected to the front, which strengthens the strength of the signal in the front.
From the above, we can see that during the use of the conference room, the full-band jammer is usually installed in the front and rear of the conference room, in a more targeted direction. Therefore, when using a full-band jammer in a conference room, a directional antenna can be used, and concentrated interference in the front direction has increased the interference distance.