Dual polarized antenna and electronic device

1 . A dual polarized antenna arranged on a circuit board, the circuit board comprising a top layer, a bottom layer, and a middle layer, the middle layer being a ground layer, and the dual polarized antenna comprising:

M array antenna units, arranged on the top layer of the circuit board, wherein M is an integer greater than or equal to 4, each array antenna unit comprises four antenna units, and the four antenna units are located at four corners of a square;

a first polarized feeding network, arranged on the bottom layer of the circuit board, wherein the first polarized feeding network comprises a first feeding port and M first feeding network subunits, and the first polarized feeding network is configured to divide a feeding signal of the first feeding port into M*4 equal sub-signals, each first feeding network subunit corresponds to one array antenna unit, the each first feeding network subunit is electrically connected to a corresponding array antenna unit through a first group of metal holes, and the each first feeding network subunit excites the corresponding array antenna unit through the first group of metal holes; and the first polarized feeding network further comprises: a fourth T-junction comprising an input end, a first output end and a second output end, wherein the input end of the fourth T-junction is electrically connected to the first feeding port; a fifth T-junction comprising an input end, a first output end and a second output end, wherein the input end of the fifth T-junction is electrically connected to the first output end of the fourth T-junction through a third microstrip line, the first output end of the fifth T-junction is electrically connected to one of the M first feeding network subunits through a fifth microstrip line, and the second output end of the fifth T-junction is electrically connected to another one of the M first feeding network subunits through a sixth microstrip line; and a length of the sixth microstrip line is one wavelength longer than a length of the fifth microstrip line;

a second polarized feeding network, arranged on the bottom layer of the circuit board, wherein the second polarized feeding network comprises a second feeding port and M second feeding network subunits, and the second polarized feeding network is configured to divide a feeding signal of the second feeding port into M*4 equal sub-signals, each second feeding network subunit corresponds to one array antenna unit, the each second feeding network subunit is electrically connected to the corresponding array antenna unit through a second group of metal holes, and the each second feeding network subunit excites the corresponding array antenna unit through the second group of metal holes;

wherein each of the M first feeding network subunit comprises:

a first T-junction, comprising an input end, a first output end and a second output end, wherein the first T-junction is configured to divide a signal of the input end of the first T-junction into two equal sub-signals;

a second T-junction, comprising an input end, wherein the input end of the second T-junction is electrically connected to the first output end of the first T-junction through a first microstrip line, thereby dividing an output signal of the first output end of the first T-junction into two equal sub-signals;

a third T-junction, comprising an input end, wherein the input end of the third T-junction is electrically connected to the second output end of the first T-junction through a second microstrip line, and the third T-junction is configured to divide an output signal of the second output end of the first T-junction into two equal sub-signals; and the second T-junction is parallel to the third T-junction.

2 . The dual polarized antenna according to claim 1 , wherein a first output end of the second T-junction, a second output end of the second T-junction, a first output end of the third T-junction and a second output end of the third T-junction are respectively electrically connected to four antenna units of the M array antenna units through metal holes.

3 . The dual polarized antenna according to claim 1 , wherein a length of the first microstrip line is equal to a length of the second microstrip line.

4 . The dual polarized antenna according to claim 1 , wherein a structure of the first feeding network subunit is same as a structure of the second feeding network subunit.

5 . The dual polarized antenna according to claim 1 , wherein each of the four antenna units is a circular patch antenna.

6 . The dual polarized antenna according to claim 1 , wherein:

the M array antenna units are 4 array antenna units;

the fourth T-junction is configured to divide the signal of the first feeding port into two equal sub-signals;

the first polarized feeding network comprises the first feeding port, a first first feeding network subunit, a second first feeding network subunit, a third first feeding network subunit, a fourth first network feeding network subunit; the first output end of the fifth T-junction is electrically connected to the first first feeding network subunit through the fifth microstrip line, and the second output end of the fifth T-junction is electrically connected to the second first feeding network subunit through the sixth microstrip line, and the first polarized feeding network further comprises:

a sixth T-junction, comprising an input end, a first output end, and a second output end, the input end of the sixth T-junction is electrically connected to the second output end of the fourth T-junction through a fourth microstrip line, the first output end of the sixth T-junction is electrically connected to the third first feeding network subunit through a seventh microstrip line, and the second output end of the sixth T-junction is electrically connected to the fourth first feeding network subunit through an eighth microstrip line.

7 . The dual polarized antenna according to claim 6 , wherein:

a length of the eighth microstrip line is one wavelength longer than a length of the seventh microstrip line.

8 . The dual polarized antenna according to claim 7 , wherein a structure of the first polarized feeding network is same as a structure of the second polarized feeding network.

9 . An electronic device, comprising a dual polarized antenna, wherein the dual polarized antenna is arranged on a circuit board, the circuit board comprises a top layer, a bottom layer, and a middle layer, the middle layer is a ground layer, and the dual polarized antenna comprises:

M array antenna units, arranged on the top layer of the circuit board, wherein M is an integer greater than or equal to 4; and each array antenna unit comprises four antenna units, and the four antenna units are located at four corners of a square;

a first polarized feeding network, arranged on the bottom layer of the circuit board, wherein the first polarized feeding network comprises a first feeding port and M first feeding network subunits, and the first polarized feeding network is configured to divide a feeding signal of the first feeding port into M*4 equal sub-signals; each first feeding network subunit corresponds to one array antenna unit, the each first feeding network subunit is electrically connected to a corresponding array antenna unit through a first group of metal holes; and the each first feeding network subunit excites the corresponding array antenna unit through the first group of metal holes; and the first polarized feeding network further comprises: a fourth T-junction comprising an input end, a first output end and a second output end, wherein the input end of the fourth T-junction is electrically connected to the first feeding port; a fifth T-junction comprising an input end, a first output end and a second output end, wherein the input end of the fifth T-junction is electrically connected to the first output end of the fourth T-junction through a third microstrip line, the first output end of the fifth T-junction is electrically connected to one of the M first feeding network subunits through a fifth microstrip line, and the second output end of the fifth T-junction is electrically connected to another one of the M first feeding network subunits through a sixth microstrip line; and a length of the sixth microstrip line is one wavelength longer than a length of the fifth microstrip line;

a second polarized feeding network, arranged on the bottom layer of the circuit board, wherein the second polarized feeding network comprises a second feeding port and M second feeding network subunits, and the second polarized feeding network is configured to divide a feeding signal of the second feeding port into M*4 equal sub-signals; each second feeding network subunit corresponds to one array antenna unit, the each second feeding network subunit is electrically connected to the corresponding array antenna unit through a second group of metal holes; and the each second feeding network subunit excites the corresponding array antenna unit through the second group of metal holes;

wherein each of the M first feeding network subunit comprises:

a first T-junction, comprising an input end, a first output end and a second output end, wherein the first T-junction is configured to divide a signal of the input end of the first T-junction into two equal sub-signals;

a second T-junction, comprising an input end, wherein the input end of the second T-junction is electrically connected to the first output end of the first T-junction through a first microstrip line, thereby dividing an output signal of the first output end of the first T-junction into two equal sub-signals;

a third T-junction, comprising an input end, wherein the input end of the third T-junction is electrically connected to the second output end of the first T-junction through a second microstrip line, and the third T-junction is configured to divide an output signal of the second output end of the first T-junction into two equal sub-signals; the second T-junction is parallel to the third T-junction.

10 . The electronic device according to claim 9 , wherein a first output end of the second T-junction, a second output end of the second T-junction, a first output end of the third T-junction and a second output end of the third T-junction are respectively electrically connected to four antenna units of the M array antenna units through metal holes.

11 . The electronic device according to claim 9 , wherein a length of the first microstrip line is equal to a length of the second microstrip line.

12 . The electronic device according to claim 9 , wherein a structure of the first feeding network subunit is same as a structure of the second feeding network subunit.

13 . The electronic device according to claim 9 , wherein each of the four antenna units is a circular patch antenna.

14 . The electronic device according to claim 9 , wherein:

the M array antenna units are 4 array antenna units;

the fourth T-junction is configured to divide the signal of the first feeding port into two equal sub-signals;

the first polarized feeding network comprises the first feeding port, a first first feeding network subunit, a second first feeding network subunit, a third first feeding network subunit, a fourth first network feeding network subunit; the first output end of the fifth T-junction is electrically connected to the first first feeding network subunit through the fifth microstrip line, and the second output end of the fifth T-junction is electrically connected to the second first feeding network subunit through the sixth microstrip line, and the first polarized feeding network further comprises:

a sixth T-junction, comprising an input end, a first output end, and a second output end, the input end of the sixth T-junction is electrically connected to the second output end of the fourth T-junction through a fourth microstrip line, the first output end of the sixth T-junction is electrically connected tothe third first feeding network subunit through a seventh microstrip line, and the second output end of the sixth T-junction is electrically connected to the fourth first feeding network subunit through an eighth microstrip line.

15 . The electronic device according to claim 14 , wherein:

a length of the eighth microstrip line is one wavelength longer than a length of the seventh microstrip line.

16 . The electronic device according to claim 15 , wherein a structure of the first polarized feeding network is same as a structure of the second polarized feeding network.