The primary objective of impedance

The primary objective of impedance matching and harmonic filtering is to achieve the maximum power transfer from the PA output to the antenna, while consuming the least amount of power and emitting the lowest level emissions in order to meet the regulatory requirements. Here we take as example the SX1261 at 915 MHz. The methodology used is applicable to both SX1261 and SX1262, at all frequencies.The transmitter impedance matching/filtering can be split into 3 sections: the impedance matching stage, the second harmonic filtering stage, and the higher order harmonic filtering stage.