Compared with other 5G bands, n28, which is usually called 700MHz band, is called "golden band" because of its low frequency, long wavelength, low propagation loss and strong penetration, which is more suitable for large-scale continuous network coverage. With the improvement of network construction, n28 has become the standard of 5G mobile phones, and the time for users to use n28 has also increased significantly.
However, due to the large size of the low-frequency antenna and the limited space of the mobile phone, the traditional mobile phone supporting n28 can only realize 2-way downlink reception (2Rx), which leads to that the speed advantage of 5G cannot be fully exerted, the signal strength is limited, and the signal is not ideal in places such as trains and elevators.
Fortunately, some mobile phone manufacturers have noticed this. For example, OPPO recently released the "Super n28" technology, which realized the downlink 4-channel reception (4Rx) of the mobile phone n28 for the first time in the industry, effectively improving the speed and signal of the mobile phone in this frequency band. This technology is extremely difficult. OPPO has invested a lot of R&D resources since 20 19 to study how to overcome the industry problems such as small mobile phone space, strong antenna coupling and immature equipment. Finally, the characteristic mode 4 antenna technology is innovatively adopted to realize n28 downlink 4-channel reception. In addition, OPPO also developed a distributed amplifier in conjunction with the supply chain to overcome the problem of large pcb link loss under four antennas and solve the problem of four-way imbalance.
The speed increase brought by "Super n28" technology is very obvious. After testing, its download speed is more than twice that of traditional 2Rx, and it can even reach nearly 20 times in extreme scenes. Thanks to four antennas, under the same conditions, the signal strength is stronger than that of traditional mobile phones, especially indoors. With the help of OPPO technology, even if we are in underground garages, subways and other places with poor 5G signals, we can still brush Tik Tok and play games smoothly without delaying sending WeChat and making phone calls, thus avoiding the embarrassment of not being able to send and receive information.
It is reported that OPPO has applied for 40 related patents for this technology, which once again shows OPPO's strong research and development capabilities. The Global 5G Patent Activity Report (2022) issued by China Communication Research Institute shows that OPPO ranks among the top ten in the world in terms of the number of effective patent families, and ranks sixth in the world in terms of the number of applications for 20021International Patent Treaty (PCT). It shows that OPPO has strong strength in the mobile communication industry, which is also an important reason for the birth of "Super n28" technology.
It is worth mentioning that "Super n28" technology is not far away from us. It has been confirmed that it will be applied to some models listed by OPPO in the second half of the year. By then, we will get a more perfect 5G experience. Whether watching videos or playing games, we can feel the effect of double improvement of network speed signals. I have to say that OPPO really attaches great importance to the user experience and regards the needs of users as its own innovation direction. I believe that this technology will continue to improve, and more new technologies will be born in OPPO in the future, which is worth looking forward to.