An antenna module includes a transceiver chip, a transmitting array antenna, a receiving array antenna, two bandpass filters, and two capacitors. The transmitting array antenna and the receiving array antenna are symmetrically disposed at the two opposite sides of the transceiver chip. One of the bandpass filters is disposed between the transceiver chip and the transmitting array antenna and connected to the transceiver chip and the transmitting array antenna. The other bandpass filter is disposed between the transceiver chip and the receiving array antenna and connected to the transceiver chip and the receiving array antenna. One of the capacitors is disposed between the transmitting array antenna and the corresponding bandpass filter and connected to the transmitting array antenna and the corresponding bandpass filter. The other capacitor is disposed between the receiving array antenna and the corresponding bandpass filter and connected to the receiving array antenna and the corresponding bandpass filter.