The utility model discloses an antenna, a communication
chip and an electronic device, and the antenna comprises an onboard antenna which is used for transmitting and receiving signals; the
impedance matching circuit is electrically connected with the onboard antenna, the
impedance matching circuit comprises a pi-type matching circuit composed of a plurality of inductors and a plurality of capacitors, and the value of at least one
inductor and / or one
capacitor is adjustable, so that the
input impedance of the onboard antenna is adjusted under different
signal source frequencies. The Pi-type matching circuit in the antenna can realize simultaneous matching of a real part and an imaginary part of
input impedance according to impedance characteristics and
signal source frequency so as to ensure maximum
power transmission, can adapt to different impedance characteristics, provides effective matching, optimizes communication performance, and improves the performance of the antenna. When the antenna is used in a communication
chip, secondary
harmonic interference can be prevented from being generated in a 2.4-2.6 G
frequency band, the
frequency spectrum quality of signals is ensured, and the
signal receiving and sending efficiency of the antenna is improved.