There are many types of 5G indoor mushroom antennas, so the parameters for the antenna also need to be considered. Different antennas need to be configured with different parameters, so we must fully consider these factors. Generally, the parameters of 5G indoor mushroom antennas should be considered from the following aspects.

　　1. Directivity of 5G indoor mushroom antenna:

　　The directivity of a 5G indoor mushroom antenna is a measure of the antenna's ability to radiate energy in the desired direction.

　　(1) Main lobe width: The main lobe width is a physical quantity that measures the degree of the maximum radiation area of ​​the antenna;

　　(2) Side lobe level: The side lobe level refers to the level of the first side lobe that is closest to the main lobe and has the highest level.

　　(3) Front-to-back ratio: Front-to-back ratio refers to the ratio of the maximum radiation direction level to its opposite direction level.

　　(4) Direction coefficient: the ratio of the radiated power flow density of the 5G indoor mushroom antenna in the maximum radiation direction at a certain distance from the antenna to the radiated power flow density of an ideal non-directional antenna with the same radiated power at the same distance.

　　2. Antenna efficiency:

　　5G indoor mushroom antenna efficiency is defined as the ratio of antenna radiated power to input power.

　　3. 5G indoor mushroom antenna gain coefficient:

　　The gain coefficient of 5G indoor mushroom antenna is a parameter that comprehensively measures the energy conversion and directional characteristics of the antenna. It is defined as the product of the directional coefficient and the antenna efficiency, denoted as: D is the directional coefficient and is the antenna efficiency. It can be seen that the higher the antenna direction coefficient sum, the higher the gain coefficient.