The impedance matching technology of the antenna aims to ensure that the maximum power is transmitted into the antenna, so that the antenna elements can radiate strongly.
Antenna impedance matching refers to matching the input impedance at the end of the antenna feed line with the characteristic impedance of the feed line.
Filter circuits are usually used for this purpose, as they can provide specific impedance at the desired transmission frequency after configuration.
Although antennas come in various shapes and sizes, they have one thing in common: impedance matching needs to be applied at the end of the feed line to ensure maximum power transmission to the load. The impedance matching circuit is very simple; They act as filters to ensure that the impedance of the antenna's feed line matches the input impedance of the antenna's input port. The simplest way to achieve impedance matching in antennas or other RF circuit components is from the perspective of filtering.