With the rapid advancement of communication technology, the development of 3G and 4G communication technologies has made “mobile cell phone jammer” encounter a dilemma. The signal interference originally designed for 2G can not cover 3G and 4G signals due to frequency reasons, which will cause the shielding to be invalid. Fortunately, mobile phone signal jammers are also developing, and soon there will be interference functions specifically for 3G and 4G frequency bands, which can shield these three frequency bands at the same time and space. The principle of mobile phone signal jammer The mobile phone signal jammer scans from the low end frequency of the forward channel to the high end at a certain speed during the working process, the transmission power is in the order of several watts, and the shielding range is adjustable, generally tens of meters.
The court is the business organization unit of the court and is a subordinate unit of the court. It is the judge who conducts the trial fair and according to the law based on objective facts and evidence, and decides whether the party violated the law, what kind of punishment should be imposed, or ruling that the party is involved in the incident The basic organization unit of the referee in which the responsibility or obligation should be assumed. The court is sacred and solemn. In order to maintain and prevent disturbing the court order, mobile phone signal jammers are usually used. The normal operation of the courts has the function of stopping social violations, maintaining the fairness and justice of the society, urging all members of the society to live together in peace, and maintaining the healthy operation of the society.
Compared with the mobile phone signal jammer, it is not particularly important, but the structure of the setting is different. From the appearance, mobile phone jammers can be divided into external antennas and internal antennas. The antenna and power supply of the built-in antenna are installed in the casing, occupying a small area, and there is no need to connect the antenna before use, which is more convenient. Therefore, the mobile phone signal jammer with built-in antenna is the first choice for the test room. In addition, the appearance of the mobile phone jammer also needs to consider the examinee’s visual experience, try to make the appearance simple, the color is not abrupt, and not let the examinee have visual pressure.