Can the number of antennas of the 5G mobile phone signal jammer be reduced?
Today, 5G networks have already been widely deployed and applied, and 5G base stations have also completed large-scale construction across the country. The corresponding 5G mobile phone signal shielding device has also been upgraded and iterated accordingly, and the 5G signal shielding device has been added simultaneously. shielding function. Careful customers will then find that: the number of antennas of the new version of the 5G mobile phone signal shielding device is obviously several more than the number of antennas of the previous shielding equipment, why is this so? Can the number of antennas be reduced with so many?
The first question that needs to be understood is why the number of antennas of the current 5G cell phone signal jammer will increase. This is because the 5G communication of various telecom operators adopts new communication frequency bands, such as 700MHz, 3400MHz, 3500MHz, 4800MHz 5G frequency bands, and some frequency bands have been adjusted, such as the original 2555-2655MHz used by China Mobile. , it was originally used as 4G communication, but in order to better meet the application requirements of 5G, it is expanded to 2515-2675MHz. From these newly added and adjusted frequency bands, it can be seen that in order to achieve effective signal shielding for 5G mobile phones, the new version of the 5G mobile phone signal shielding instrument must correspondingly increase the shielding modules of these frequency bands, and each module must also correspond to a antenna. Moreover, the original 2G, 3G, and 4G shielding modules and antennas still need to be retained, so the final result is that the total number of antennas can only increase.
So can the number of antennas of the 5G mobile phone signal jammer be reduced? There is a way to reduce it, which is to select a part of the shielding module, first combine its output signals into one through the combiner, and then output the shielding signal through the antenna. The combiner that can be used has two inputs and one output, or three inputs and one output. However, the method of using a combiner will bring two negative problems: the first problem is the shielding signal after the combination, The frequency bandwidth it covers will increase a lot, which puts forward higher requirements on the standing wave performance of the antenna, and will also have a certain impact on the parameters of the standing wave ratio. The second problem is that it will bring about an increase in hardware costs. Because if the cost of the combiner is compared with the cost of the antenna, the cost of a single antenna is much cheaper.
To sum up, the vast majority of manufacturers of 5G mobile phone signal shielding devices will use a shielding module corresponding to a transmitting antenna in the case of no special requirements from customers, considering the production cost and technical indicators of the shielding equipment. In this way, reducing the number of antennas will not be a priority for the time being.