Can the volume and antenna of the frequency jammer be reduced?
There are many types of frequency jammers on the market now, regardless of power or device size, which come with many antennas. Some friends may be more concerned about the problem of too many antennas. So the question is, can we reduce the number of multiple antennas in frequency jammers?
My friend has this question mainly because they think that having too many antennas affects aesthetics and also considers the concealment when using it.
In fact, the number of antennas is equal to the number of signal shielding modules. Nowadays, if frequency jammers need to completely block all 2, 3, 4, 5G, and WiFi signals, according to the frequency band standards of various mobile phone systems, frequency jammers will need at least 10 to 12 frequency bands, which means they need to be equipped with at least 10 to 12 shielding modules covering these frequency bands, so the number of antennas has been determined.
Is it feasible to reduce the number of antennas? In theory, it can be achieved. And technically, there are no obstacles at all. However, merging multiple antennas can result in some collateral losses, such as:
1. It is necessary to merge antennas of different frequency bands through a combiner. Adding a combiner will require suitable installation space for the combiner, which increases the appearance size of the frequency jammer;
2. From the RF output end of the shielding module in the frequency jammer to the antenna end after passing through the combiner, there will be a certain degree of signal attenuation in the middle connector or connecting cable. This will result in a decrease in the effective power ultimately emitted from the antenna;
3. The transmission antenna used after merging multiple frequency bands will greatly increase the standing wave frequency bandwidth it can support, and the increase in bandwidth will reduce the gain of the antenna, which in turn will cause the frequency interference line to merge. In fact, it is a trade-off issue. If you want to maximize the shielding effect of the frequency interference machine, then give up the antenna merging scheme.
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