Millimeter wave array antenna module and mobile terminal

1. A millimeter wave array antenna module, comprising:

a dielectric substrate;

a radio frequency integrated circuit chip attached to one side of the dielectric substrate;

a plurality of antenna units arranged in an array and disposed on a side of the dielectric substrate facing away from the radio frequency integrated circuit chip; and

a feeding network formed in the dielectric substrate,

wherein each of the plurality of antenna units is electrically connected to the radio frequency integrated circuit chip through the feeding network, and comprises a substrate integrated waveguide and a patch antenna, wherein the substrate integrated waveguide comprises a back cavity and the patch antenna is attached to the substrate integrated waveguide corresponding to the back cavity;

the substrate integrated waveguide comprises:

a dielectric plate comprising a first surface and a second surface that are opposite to each other in a thickness direction of the dielectric plate;

a first metal layer attached to the first surface;

a second metal layer attached to the second surface; and

a plurality of metal vias provided on a periphery of the dielectric plate and spaced apart from each other, wherein each of the plurality of metal vias communicates the first metal layer with the second metal layer, and the first metal layer, the second metal layer and the plurality of metal vias are cooperated with each other to form the back cavity.

2. The millimeter wave array antenna module as described in claim 1 , wherein a radiation window is opened in a center of the first metal layer; the patch antenna is received in the radiation window and is spaced apart from the first metal layer; and each of the plurality of antenna units further comprises a feeding probe, and the feeding probe comprises a first end electrically connected to the patch antenna and a second end penetrating the second surface to be connected to the feeding network.

3. The millimeter wave array antenna module as described in claim 2 , wherein the radio frequency integrated circuit chip comprises a plurality of channels, wherein each of the plurality of channels comprises at least one phase shifter, and each of the plurality of antenna units is electrically connected to an input terminal of one of the at least one phase shifter via the feeding network.

4. The millimeter wave array antenna module as described in claim 2 , wherein the plurality of antenna units comprises four antenna units arranged in a 1*4 array.

5. The millimeter wave array antenna module as described in claim 1 , wherein the radio frequency integrated circuit chip comprises a plurality of channels, wherein each of the plurality of channels comprises at least one phase shifter, and each of the plurality of antenna units is electrically connected to an input terminal of one of the at least one phase shifter via the feeding network.

6. The millimeter wave array antenna module as described in claim 5 , wherein one of the at least one phase shifter is a five-bit digit phase shifter.

7. The millimeter wave array antenna module as described in claim 5 , wherein the phase shifter has a phase shift accuracy of 11.25°.

8. The millimeter wave array antenna module as described in claim 1 , wherein the radio frequency integrated circuit chip comprises a plurality of channels, wherein each of the plurality of channels comprises at least one phase shifter, and each of the plurality of antenna units is electrically connected to an input terminal of one of the at least one phase shifter via the feeding network.

9. The millimeter wave array antenna module as described in claim 1 , wherein the plurality of antenna units comprises four antenna units arranged in a 1*4 array.

10. The millimeter wave array antenna module as described in claim 1 , wherein the plurality of antenna units comprises four antenna units arranged in a 1*4 array.

11. A mobile terminal, comprising the millimeter wave array antenna module as described in claim 1 .