Nowadays, most of the mobile phone Nowadays, most mobile phone jammers adopt a relatively closed shell design, and their matching antennas also use the form of built-in antennas. Many years ago, the way of external antenna, that is, the antenna is directly screwed on the body of the mobile phone jammer, this style is rare. However, manufacturers who still use the external antenna method will explain to customers from such a point of view: it is said that the built-in antenna will affect the signal transmission of the mobile phone jammer due to the blocking and attenuation of the casing, thereby reducing the interference with the mobile phone. Effect. So, is it correct to say that the built-in antenna does not work well?

This statement seems to have some truth, but it is not correct.

The mobile phone jammer transmits the signal of the mobile phone through the antenna. From the perspective of the type of signal, it is actually a radio wave. As we all know, the transmission characteristics of radio waves are different from the transmission of light. is interrupted, or refraction and reflection occur. After the radio wave is emitted through the antenna, it will directly penetrate or bypass the obstacle. Its transmission characteristics are somewhat similar to the commonly known sound wave transmission. As the transmission distance increases, its signal strength will gradually weaken.

Mobile phone jammers with built-in antennas are generally made of ABS plastic or customized wave-transmitting materials, which interfere with the wireless signal of the mobile phone and can directly penetrate the shell, and the signal attenuation generated by the shell is almost negligible. . So there is no need to worry that the effect of interfering with the mobile phone is reduced due to the built-in antenna. Unless the manufacturers of mobile phone jammers do not understand the transmission principle of wireless signals, they use metal plates or metal mesh structures as shell materials, because these materials will affect the transmission of radio waves and reduce the effect of interfering with mobile phones.