With the popularity of full-screen and the proportion of Smartphone, screens have also increased, leaving less space for RF and antennas. Various manufacturers have racked plain to balance design and signal quality, supporting more 4G networks. The frequency band has further increased the difficulty of antenna design. Today, Xiaomi gave a detailed introduction of Mi MIX 3 antenna design.
According to the official introduction, the antenna design has 3 major difficulties: one is the ultra-high screen ratio, the minimum clearance area; the 2nd is the 4G global communication under the small clearance area; the 3rd is the variable brought by the magnetic power slide. in order to meet the above 3 challenges, Xiaomi Mi MIX 3 is ready at the beginning of the project. The specific countermeasures are as follows.
1, full simulation simulator prediction
Faced with the above 3 challenges, Xiaomi Mi MIX 3 is ready at the beginning of the project. For various situations that may be encountered when using the mobile phone, such as horizontal and vertical grip, open and Close the slide, engineers can use the full simulator to obtain various data needed and then guide according to the simulation situation.
2, the custom smart antenna switching
It’s Snapdragon 845 processor to intelligently process signal data and determine which scene the user is using. The powerful AI computing capability of the Snapdragon 845 helps the Mi Mix 3 to switch antennas more intelligently, thus ensuring signal strength.
3, sensor-assisted detection
In addition, in order to better determine which usage scenario the mobile phone is in, Xiaomi Mi MIX 3 will use sensors to detect how the user holds the mobile phone in actual use, and whether the slide is open or close, and then transfer the data to processor processes it to enable the antenna that best fits the current scene.
It is worth mentioning that the official also brought the signal comparison test of Xiaomi Mi MIX 3 and iPhone XS Max.
The measured data shows that in the same environment, China’s 4G network is also used, whether it is conducive to the open area of the antenna to send and receive signals, or in underground garages with large traffic and interference factors, the signal strength of Mi MIX 3. The actual download speed data is stronger than the iPhone XS Max.