Patent ID: 7100127

Claim:
A method for designing an impedance matching circuit, used for matching a power amplifier and an antenna, and said impedance matching circuit including a first antenna impedance matching circuit and a first power amplifier impedance matching circuit, said method comprising: (a) providing a second antenna impedance matching circuit to match with said first power amplifier impedance matching circuit so that a phase error of a signal outputted by said antenna meets a predetermined specification; (b) forming a fast overall circuit by said second antenna impedance matching circuit and said first power amplifier Impedance matching circuit, and estimating a first impedance range of said first overall circuit; (c) providing a second power amplifier impedance matching circuit to match with said first antenna impedance matching circuit to form a second overall circuit; and (d) adjusting a second impedance range of said second overall circuit to make said second impedance range overlap with said first impedance range.