2.4GHz is like diaosi, although the big live good, but gradually difficult to meet the people's growing demand for high rate, so it has been replaced by 5GHz meaning.
However, 2.4GHz has the advantage that the wavelength is relatively long, and the ability of piercing the wall is high (the so-called king of piercing the wall in the market is generally on the 2.4GHz link, such as high-gain omnidirectional 2.4GHz antenna). The wavelength of 5GHz is relatively short, and the ability of piercing the wall is shameful.
Both 2.4GHz and 5GHz have their own advantages, and it is impossible to find a set of solutions that take both into account in a short time.
So what to do? Yes, you guessed it right, and the answer is to mix them together, as shown in the picture below. In order to reduce the interference of the same frequency, also in order to reduce the correlation degree of the antenna, it is better to adopt the layout method of staggered teeth. Of course, this is a more complicated problem, I will not expand on it.