An antenna module includes a circuit board, a differential-type amplifier, and a dipole antenna. The dipole antenna can be formed with two electrodes disposed on the circuit board. With the structure of the antenna module, a transmitting antenna can be designed by coupling the two electrodes of the dipole antenna to output terminals of the differential-type amplifier so as to transmit signals. In design of a receiving antenna, the two electrodes of the dipole antenna can be coupled to input terminals of the differential-type amplifier so as to receive signals. Further, if the main function chip has built-in differential power amplifier or differential low noise amplifier, a circuit module for wireless signal transmitting and receiving can be formed by directly coupling the dipole antenna to the differential power amplifier or the differential low noise amplifier.