Dual-band and dual-polarized mm-wave array antennas with improved side lobe level (SLL) for 5G terminals
An antenna array and a user equipment (UE) including the antenna array. The antenna array includes a plurality of unit cells. Each unit cells includes first and second patches, phase shift transmission lines, a third patch, and a transmission line. The first and second patches radiate at a first frequency band and positioned in a first plane of the antenna array. The phase shift transmission lines connect the first and second patches and shift a phase of a signal between the first and second patches. The third patch is positioned in a second plane of the antenna array and beneath the first patch and radiates at a second frequency band that is lower than the first frequency band. The transmission line excites at least the third patch.
1. An antenna array comprising:
a plurality of unit cells, each unit cell comprising:
first and second patches, the first and second patches configured to radiate at a first frequency band and positioned in a first plane oriented along a first direction of the antenna array;
a set of phase shift transmission lines connecting the first and second patches and configured to shift a phase of a signal between the first and second patches;
a third patch positioned in a second plane oriented along the first direction of the antenna array and beneath the first patch that is in the first plane, the third patch configured to radiate at a second frequency band that is lower than the first frequency band; and
a transmission line configured to excite at least the third patch.
2. The antenna array of claim 1 , wherein:
the third patch includes a port, and
the transmission line passes through the port to excite both the first patch and the third patch.
3. The antenna array of claim 2 , wherein the transmission line includes:
a vertical feed coupler that extends through the port, and
a horizontal feed coupler that extends from the vertical feed coupler to excite the first patch and the third patch.
4. The antenna array of claim 1 , wherein the antenna array further comprises a second transmission line configured to excite the second patch.
5. The antenna array of claim 4 , wherein:
one of the set of phase shift transmission lines is excited by the second patch, and
the first patch is excited by the one of the set of phase shift transmission lines from the second patch.
6. The antenna array of claim 5 , wherein the first patch is excited by a phase-inverted copy of a signal that that excites the second patch.
7. The antenna array of claim 1 , further comprising a splitter configured to feed the first patch and the second patch.
8. The antenna array of claim 1 , wherein the antenna array is configured to emit radiation at least one of the first frequency band or the second frequency band with a reduced side lobe level.
9. The antenna array of claim 1 , wherein each of the phase shift transmission lines provide dual-polarized radiation.
10. The antenna array of claim 1 , wherein the first frequency band is a 39 GHz frequency band and the second frequency band is a 28 GHz frequency band.
11. A user equipment (UE) comprising:
a transceiver configured to transmit and receive signals via an antenna array; and
the antenna array operably connected to the transceiver, the antenna array comprising a plurality of unit cells, each unit cell including:
first and second patches, the first and second patches configured to radiate at a first frequency band and positioned in a first plane oriented along a first direction of the antenna array;
a set of phase shift transmission lines connecting the first and second patches and configured to shift a phase of a signal between the first and second patches;
a third patch positioned in a second plane oriented along the first direction of the antenna array and beneath the first patch that is in the first plane, the third patch configured to radiate at a second frequency band that is lower than the first frequency band; and
a transmission line configured to excite at least the third patch.
12. The UE of claim 11 , wherein:
the third patch includes a port, and
the transmission line passes through the port to excite both the first patch and the third patch.
13. The UE of claim 12 , wherein the transmission line includes:
a vertical feed coupler that extends through the port, and
a horizontal feed coupler that extends from the vertical feed coupler to excite the first patch and the third patch.
14. The UE of claim 11 , wherein the antenna array further comprises a second transmission line configured to excite the second patch.
15. The UE of claim 14 , wherein:
one of the set of phase shift transmission lines is excited by the second patch, and
the first patch is excited by the one of the set of phase shift transmission lines from the second patch.
16. The UE of claim 15 , wherein the first patch is excited by a phase-inverted copy of a signal that that excites the second patch.
17. The UE of claim 11 , further comprising a splitter configured to feed the first patch and the second patch.
18. The UE of claim 11 , wherein the antenna array is configured to emit radiation at at least one of the first frequency band or the second frequency band with a reduced side lobe level.
19. The UE of claim 11 , wherein each of the phase shift transmission lines provide dual-polarized radiation.
20. The UE of claim 11 , wherein the first frequency band is a 39 GHz frequency band and the second frequency band is a 28 GHz frequency band.