Look for a position where the interference wave cannot interfere or interfere with the small interference, that is, the interference dead angle. Both the interference wave and the satellite wave are linear waves, and obstacles encountered during the journey will be reflected, but the difference between the two types of waves is that the field of the interference wave is more than ten million times stronger than the satellite wave, causing obstacles and buildings. After that, it will be reflected everywhere, and the satellite waves are easily absorbed by the surface if they are not reflected by the antenna.
The easiest way to find the shielding position is to reduce the antenna height and use the surrounding natural objects to avoid the strong microwave interference signals around. For example, it is better to put it in the yard than to put it on the roof. You can also dig a side length on the ground. The depth of the 2mx2m deep square pit can be controlled according to the situation. The principle is that the deeper the better, but pay attention to the front of the antenna (in the south direction) not to be blocked by the soil. The antenna is placed at the bottom of the pit, that is, the antenna cannot receive the signal. Pit height occlusion; the antenna can also be moved to the other side of the building, using buildings to block sources of interference from that direction.
2. Install anti-jamming deviceThe satellite interference signal comes from the ground, and the satellite signal comes from the sky. As long as the satellite interference signal on the ground is shielded, it is OK. Use a metal or wire mesh to make a fence for the satellite antenna. If you do not block the satellite signal but block the interference signal, you can avoid interference. Judging the source direction of the interference wave, a metal plate (net) is placed on one or more sides of the antenna to block the interference wave. The metal plate (mesh) erection height needs to exceed the high frequency head, and can not block the travel route of the satellite signal.
Since the C-band signal wavelength is between 71.4mm and 88.2mm, if the metal mesh is used to shield the interference wave, in order to prevent the interference source from leaking into the metal mesh, the mesh aperture should be less than 1/4 of the shortest wavelength of 71.4mm, that is, less than 17.85mm. If the interference is not too serious, you can also add a metal strip with a width of 10~20cm on the outer edge of the antenna and perpendicular to the plane of the pot. Of course, the wider the width of the metal strip, the stronger the anti-jamming performance, but the one-pot multi-star antenna should not adopt this method, it will block the satellite signal reception that is not perpendicular to the pot surface.
3. Turn the star or change the Ku head to receive the Ku band signal.If the signal to be received is received on the C-band of other satellites, it can be received by the star, and the direction of the receiving antenna can be changed to see if it can avoid the interference area of ​​the interference wave. In addition, the star can be changed or the Ku head can be changed. Receive Ku-band signals to avoid interference. This is the most direct and effective method.
Bluetooth
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