Switching circuit and control method of antenna module

A switching circuit of an antenna module for switching a plurality of antennas of the antenna module so that the antenna module has a plurality of modes of use and each mode with two antennas for radiating a transmitting signal generated from a signal processing unit or sending a received receiving signal to the signal processing unit;

• the switching circuit comprising:
• a plurality of power dividing modules for dividing the transmitting signal into the antennas;
• a plurality of switches coupled to the power dividing modules, the plurality of switches including a first switch coupled to the signal processing unit and a second switch coupled to the first switch for sending the transmitting signal to the power dividing modules;
• and
• a control unit for controlling on and off of the switches as well as the signal processing unit;
• wherein the receiving signal received by the antennas passes through the power dividing modules and the switches, to the signal processing unit,
• wherein the antenna module has a first antenna, a second antenna, a third antenna and a fourth antenna;
• the plurality of power dividing modules comprising:
• a first power dividing module dividing the transmitting signal to the first antenna and the second antenna;
• a second power dividing module dividing the transmitting signal to the third antenna and the fourth antenna;
• a third power dividing module dividing the transmitting signal to the first power dividing module and the second power dividing module;
• and
• the plurality of switches including:
• the first switch coupled between the signal processing unit and the third power dividing module;
• the second switch coupled between the first switch and the first power dividing module as well as between the first switch and the second power dividing module;
• a third switch coupled between the third power dividing module and the first power dividing module;
• and
• a fourth switch coupled between the third power dividing module and the second power dividing module.