The signal jammer for cell phone blocks the signal from the mobile phone receiving base station. It will attenuate when it encounters obstacles. If it is a solid wall of reinforced concrete, the attenuation after penetration is very large; if it is made of gypsum board, the attenuation is smaller; if it is made of glass or wood, there is basically not much attenuation.
Step 1: Take a used can, clean it, and pull out the tab
Step 2: Cut the bottom of the tank as shown in the picture and remove the entire bottom. The cut-off bottom is no longer needed.
Step 3: Cut the top of the can as shown in the picture. Be careful not to cut all the way. Leave 1-2 cm part without cutting. At the same time, the remaining 1-2 cm part must be close to the mouth of the can.
Step 4: Draw a vertical red line on the back as shown in the picture and cut off the iron sheet along the middle of the red line.
Step 5: Spread the cut iron sheet slowly and make it into a fan shape.
Step 6: Put the finished sector-shaped iron shell on the topsignaljammer signal blocker antenna. As shown in the picture, if there are many antennas, we can make 2-3 identical iron shells and put them on.
Due to limited materials, we only made one iron sheet. If we make 2-3, the effect will be better. After doing this, we can install and fix the mobile phone signal jammer on the wall, which will double the emission effect and have a stronger penetration effect.