The test room jammer is to complete the signal shielding for all 2G, 3G, 4G, 5G and other standards, which determines that a standard 5G test room jammer needs to be included in the frequency range covered by the shielded signal from 700MHz to 4960MHz . Of course, in such a wide frequency bandwidth, the test room jammer does not need seamless coverage during the implementation of signal shielding, but only needs to be able to cover the frequency band for mobile phones. Among all the working frequencies of mobile phones, there is a frequency segment that is the most special. Its bandwidth is only 115MHz, but it concentrates mobile phones of different standards such as 2G, 3G, and 4G from the three communication operators of China Mobile, China Unicom, and China Telecom. Signal.
This most special frequency band is the 1800MHz frequency band. Its frequency range is 1805-1920MHz, and the coverage of the test room jammer for the 1800MHz frequency band is also in line with this frequency range. According to the latest version of the planning standard of the Ministry of Industry and Information Technology, 1805-1830MHz belongs to the 2G frequency band of China Mobile, 1830-1860MHz belongs to the 3G and 4G frequency band of China Unicom, 1860-1880MHz belongs to the 3G and 4G frequency band of China Telecom, and 1885-1920MHz belongs to In the 4G or 5G frequency band of China Mobile, each communication operator determines whether to deploy 3G or 4G base station signals according to its own needs during actual operation.
We can see that the 1800MHz frequency band is indeed the most complex and crowded frequency band, and if the test room jammer wants to achieve a more ideal signal shielding effect, it must pay attention to and strengthen the power of the shielding signal for the 1800MHz frequency band, and at the same time, it needs to do better. Reasonable division of shielding modules. Generally speaking, in the current mainstream test room jammers, in the frequency band division scheme of the shielding module, the first choice is to divide into two: 1805-1880MHz and 1880-1920MHz. But this is still not the best solution. If you want to pursue a better shielding effect, the ideal way for the test room jammer to divide the 1800MHz frequency band should be divided into three sections, namely: 1805-1830MHz, 1830-1880MHz, and 1880-1920MHz.
