Adjusting the antenna angle of the router really enhances the signal

Adjusting the antenna angle of the router really enhances the signal

Is the wireless router antenna orientation and angle related to the strength of the signal? YES! After inadvertently hitting the wireless router antenna, the overall signal will change greatly. I am afraid that many small partners have not noticed it. I share with you the angle of the wireless router and the dBi value. influences.

——90, 45, 0 degree signal is very different

In general, the wireless routing antenna has a structure that can be directly bent at the joint part, and has a cassette fixed at a bending angle of 90°, 45°, and 0°. This time, the three angles are directly used for testing. Take the ASUS RT-AC68U as the test route and install the “Wifi Analyzer” on the phone to test the signal strength. Because of the limited field, the signal power output of the wireless router is minimized, and the mobile phone is automatic. The two devices are about 5 meters apart, with a cement brick wall about 10 cm in the middle.

When the antenna is adjusted to 0°, 45°, and 90°, the signal strength measured on the mobile phone can be seen to be the strongest at 90°, with -64dBm; 45° and 0° are -78dBm and - 72dBm. This signal is large and small, and the situation of non-linear declining intensity is also confusing.

——The signal distribution is different

Later, I checked the data. In this case, there is a significant difference in the antenna with a larger gain value. Have the friends thought that the higher the gain value of the antenna, the signal can be transmitted farther, but we all learned the conservation of energy when we were young, when the wireless base station output is not increased, where are these farther signals coming from? 

These extra signals are actually supplemented by signals that would otherwise be transmitted to other directions. The more complete manufacturers, in addition to the identification of the gain value outside the antenna product, will also print two pictures that are very similar to the radar screen. These two figures are the polarization map of this antenna. The reason for the two is that the electric field and the magnetic field exhibit a natural law of 90° intersection. The distribution of the antenna signals can be seen from these two figures.

- Signal like a donut stack

As can be seen from the figure, by vertically overlapping the two polarization maps, the signal distribution of the antenna can be seen. In the case of the wirelessly routed antenna, the signal area is like a donut stack, in the middle. The doughnut is the biggest, then it goes down. In the upper section, the antenna will take the signal of other space to fill the lateral distance. We can understand the feeling of flattening the doughnut. The flattened doughnut has a larger diameter (the signal is transmitted farther), but the height is relatively short. (There is less space for signals), the higher the gain value of the antenna is to flatten the doughnut.

Knowing the antenna characteristics, we can adjust the antenna angle to cover the signal area to the range of mobile devices. Generally, a single-floor home has an antenna perpendicular to the ground plane. When it is in the sky, the antenna can be placed parallel to the ground plane to cover the wireless signal to other floors.

——The story of the antenna dBi value

The ideal antenna is to transmit signals in all directions. The signal received at the same distance from the antenna should have the same signal strength. This is the ideal antenna. Unfortunately, the current technology cannot manufacture such an antenna.

Another commonly used antenna is a dipole antenna. Compared with an ideal antenna, a dipole antenna has different positions at the same distance, and different measured signal strengths occur. In some places, the signal strength is higher than the ideal antenna. Some places are lower. Therefore, according to the dipole antenna signal, the strongest abdomen is compared with the ideal antenna. The signal strength of the dipole antenna is 1.6 times stronger than that of the ideal antenna, and is converted to 2.15 dBi (i refers to the comparison with the ideal antenna); Say a dipole antenna has a gain of 2.15dBi.

- The signal is really good

The same wireless router uses 5dBi and 10dBi antennas for testing. The mobile terminal uses SpeedTest test data. Although there is no big change in the data, you can observe the downward rate line graph. The antenna with the larger dBon value, the smoother the curve. . In terms of stability and speed, those antennas with high dBi values claim to increase the signal range, not casually.

- How to replace the wireless router antenna

The premise that the lineless router antenna can be replaced is that it has a detachable design. In this case, we only need to find the corresponding antenna on a certain treasure. For a small partner who has no pregnant women or children at home, the dBi value is slightly replaced. The routing is completely fine.

Small antennas, big players may be the products of wireless router antennas. The more unobtrusive things are, the more there are many places that everyone should discuss and have fun together.