Can Cell Phone Companies Block Numbers
The omnidirectional antenna (whip antenna) is usually used to keep the antenna vertical and upward (that is, the top of the antenna is upward). According to the signal transmission characteristics of omnidirectional antennas, the signal coverage of omnidirectional antennas can be generally regarded as a spherical area centered on the antenna, but in fact, Can Cell Phone Companies Block Numbers extension lines at both ends of the antenna are areas where signal transmission is weak. Therefore, if you want the omnidirectional antenna to display a large signal coverage radius, you should try to avoid the antenna facing the area that you want to be shielded. For example, when an omnidirectional antenna is installed vertically towards the sky, the area around the antenna is the area where the shielded signal is transmitted far, and the upper sky and the ground below the antenna are the areas where the shielded signal is weak. Similarly, if cell phone jammer encounters too wide coverage of the shielded signal of the mobile phone when using an omnidirectional antenna, you can properly adjust the direction of the antenna and point the antenna to the area that you do not want to be shielded. Then, the shielded signal of the area pointed to by the antenna will be Correspondingly weaken.
When the site environment requires high shielding, or there is an area that does not need to be shielded around the shielded area, it is recommended to use a directional antenna. The directional antenna can transmit the shielded signal relatively concentratedly toward a certain area, and the area facing the directional antenna will be It is an area where the shielded signal is transmitted far. It should be noted that a small part of the area on both sides and behind the directional antenna is still covered by the Can Cell Phone Companies Block Numbers signal. If the mobile phone jammer is installed in an outdoor environment, waterproof and lightning protection measures must be taken. Generally, it is recommended to choose an installation box for the mobile phone jammer. The box of the installation box is made of metal and has shutters on both sides. Ventilation position (enhanced heat dissipation), the top of the box has a hole to extend the antenna of the mobile phone jammer (the hole is sealed with hot melt glue), and the bottom of the box has a power input hole and a diversion hole (to prevent water accumulation)