At present, everyone will judge the strength of the signal through the wifi signal cell or mobile phone signal grid displayed on the ipad or mobile phone. However, in fact, the signal strength is very important. Is it judged whether the wireless performance of a mobile phone only depends on the strength of the signal? What are the key factors related to? Please see below.
At present, everyone will judge the strength of the signal through the wifi signal cell or mobile phone signal grid displayed on the ipad or mobile phone. However, in fact, the signal strength is very important. Is it judged whether the wireless performance of a mobile phone only depends on the strength of the signal? For example, the wifi throughput of 4G mobile phones and 802.11ac in the future is also directly related to antennas, channel correlation, and chip baseband algorithms.
The average person habitually calls the wireless performance of the mobile phone as "strong" or "weak". In fact, besides the strength of the signal, the wireless performance of the mobile phone is directly related to its baseband algorithm, especially after entering 4G, the baseband algorithm. The pros and cons will directly determine the "Internet speed" of the mobile phone - at this level, everyone will truly understand how much difference is in the baseband algorithm, such as Qualcomm, Intel, MTK, Spreadtrum, and HiSilicon, not just 4-core, 8-core or 32-bit, 64-bit or CPU clock speed is such a simple and rough evaluation method to evaluate the performance of a communication chip - but today, we only talk about the signal "strong" and "weak" for the time being.
In other words, in fact, the quality of mobile phone wireless performance depends partly on the overall RF or antenna design, and the other depends on the baseband algorithm (communication chip), but my discussion today is limited to the RF and antenna levels. One thing to keep in mind is that more and more mobile phones, especially 4G mobile phones, will have a baseband algorithm that will affect the wireless performance of the whole machine and directly reflect the Internet speed. Focusing only on RF design or signal "strong" and "weak" is an outdated, one-sided view.
The strength of the mobile phone signal is determined by the mobile phone itself and by the operator's network. The network coverage of operators is mainly related to the layout and transmission power of base stations. There are specialized network optimization departments within each operator to do related optimization work for network load conditions and signal coverage blind areas to ensure the most user experience. Good, of course, if the performance of the mobile phone is better, the requirements for the network are relatively lower. Therefore, when the mobile phone is collected, the operator needs to test the wireless performance of the mobile phone. As a general user, we may be able to choose different operators, but we can't control the network status of the operators, so the average person is more operable, pay attention to the wireless performance of the mobile phone, and then choose a better performance. In this way, under the same network coverage, the Internet speed and call quality can be better than others.
For the mobile phone's own RF and antenna design, in fact, we generally focus on the power of the mobile phone to transmit outside (can be understood as the size of the door), and the receiving sensitivity (such as the sound that the ear can hear), in addition to their own design In addition to the pros and cons, it is also related to the electromagnetic compatibility design of the whole machine. Take the receiving sensitivity as an example. If your ear can hear a small sound, but if the noise of the surrounding environment (electromagnetic interference on the board) is too large, you I can't hear what the other party said. This problem is particularly prominent on mobile phones. Because the mobile phone is as big as a palm, the components and various modules and antennas are densely packed, and the board design is slightly inappropriate. Mutual interference occurs between modules, or the signal-to-noise ratio in the receiver system deteriorates due to EMI (Electro-Magnetic Interference).
In addition, the metal parts on the mobile phone and even the human hand posture will have an impact on the wireless performance of the mobile phone. In fact, RF/hardware engineers have long known that the human head and the hand will have an impact on the design performance of the radio frequency and the antenna, but this effect is After the "antenna door" incident on the iPhone 4, it was quickly enlarged by the media.
Outdoor Intelligent Ring Main Unit
Outdoor Intelligent Ring Main Unit,Outdoor Ring Main Unit,Switchgear Ring Main Unit,Ring Main Unit Switchgear
TRANCHART Electrical and Machinery Co.,LTD , https://www.tranchart-electrical.com