Mobile wireless communications device with multiple-band antenna and related methods
View Patent ↗A mobile wireless communications device may include a housing, a wireless transceiver carried by the housing and having a primary output, and a secondary output, and a multiple-band antenna carried by the housing and coupled to the wireless transceiver. The multiple-band antenna may include a dielectric substrate and a pattern of electrically conductive traces thereon defining a primary radiator and a secondary radiator spaced apart from the primary radiator. The primary radiator may include a first elongate member having a primary feed coupled to the primary output, and a first reference member spaced from the first elongate member and at least partially laterally surrounding the first elongate member and coupled to a reference voltage. The secondary radiator may include a second elongate member having a secondary feed coupled to the secondary output.
1. A mobile wireless communications device comprising:
a housing;
at least one wireless transceiver carried by the housing and having a primary output, and a secondary output; and
a multiple-band Multiple Input Multiple Output (MIMO) antenna carried by the housing and coupled to the at least one wireless transceiver, the multiple-band MIMO antenna comprising:
a primary radiator and a secondary radiator, wherein the primary radiator comprises a conductive first elongate member and a conductive first reference member spaced from the first elongate member, the first reference member coupled to a reference voltage and partially surrounding the first elongate member,
the first elongate member of the primary radiator having a primary feed coupled to the primary output, the secondary radiator having a secondary feed coupled to the secondary output, wherein the primary radiator excites a first signal associated with a first dominant mode, and wherein the secondary radiator excites a second signal associated with a different other dominant mode for a given operating frequency, wherein the primary radiator and the second radiator have a spacing therebetween, wherein the spacing achieves a low correlation between the first signal and the second signal.
2. The mobile wireless communications device of claim 1 , wherein a current distribution and radiation pattern of the primary radiator is un-correlated to a current distribution and radiation pattern of the secondary radiator.
3. The mobile wireless communications device of claim 1 , wherein the multiple-band MIMO antenna comprises a dielectric substrate and a pattern of electrically conductive traces thereon defining the primary and secondary radiators.
4. The mobile wireless communications device of claim 1 , wherein the secondary radiator comprises a second elongate member.
5. The mobile wireless communications device of claim 1 , wherein the multiple-band MIMO antenna comprises a dielectric substrate and a pattern of electrically conductive traces thereon defining the primary and secondary radiators, wherein the first reference member comprises a U-shape defining an inner space, and wherein a portion of the first elongate member is positioned in the inner space.
6. The mobile wireless communications device of claim 4 , wherein the first reference member comprises a first arm, and a second arm perpendicularly coupled thereto, wherein the first arm has an L-shape, and wherein the second arm comprises a proximal portion coupled to the first arm and having an L-shape, and a distal portion extending away from the proximal portion.
7. The mobile wireless communications device of claim 6 , wherein the second elongate member has a first arm, and a second arm coupled thereto, wherein the secondary feed is on the second arm, and wherein the first arm extends at least partially along a bottom edge of the housing.
8. The mobile wireless communications device of claim 4 , wherein the first reference member comprises a first arm that extends along a bottom of the housing.
9. The mobile wireless communications device of claim 3 , wherein the dielectric substrate has a non-planar shape.
10. The mobile wireless communications device of claim 3 , wherein the dielectric substrate is carried by a bottom of the housing.
11. The mobile wireless communications device of claim 3 , wherein the primary and secondary radiators are carried by respective opposing first and second sides of the dielectric substrate.
12. The mobile wireless communications device of claim 1 , wherein the at least one wireless transceiver comprises a Long Term Evolution (LTE) transceiver configured to operate the primary and secondary outputs in an LTE carrier aggregation mode.
13. The mobile wireless communications device of claim 1 , wherein the low correlation is less than a required correlation provided by Long Term Evolution (LTE) standards.
14. A multiple-band Multiple Input Multiple Output (MIMO) antenna for a mobile wireless communications device comprising a housing, and at least one wireless transceiver carried by the housing, the multiple-band MIMO antenna comprising:
a primary radiator and a secondary radiator, wherein the primary radiator comprises a conductive first elongate member and a conductive first reference member spaced from the first elongate member, the first reference member coupled to a reference voltage and partially surrounding the first elongate member,
the first elongate member of the primary radiator having a primary feed coupled to a primary output, the secondary radiator having a secondary feed coupled to a secondary output, wherein the primary radiator excites a first signal associated with a first dominant mode, and wherein the secondary radiator excites a second signal associated with a different other dominant mode for a given operating frequency, wherein the primary radiator and the second radiator have a spacing therebetween, wherein the spacing achieves a low correlation between the first signal and the second signal.
15. The multiple-band MIMO antenna of claim 14 , wherein a current distribution and radiation pattern of the primary radiator is un-correlated to a current distribution and radiation pattern of the secondary radiator.
16. The multiple-band MIMO antenna of claim 14 , further comprising:
a dielectric substrate and a pattern of electrically conductive traces thereon defining the primary radiator and the secondary radiator.
17. The multiple-band MIMO antenna of claim 16 , wherein the dielectric substrate has a non-planar shape.
18. The multiple-band MIMO antenna of claim 16 , wherein the primary and secondary radiators are carried by respective opposing first and second sides of the dielectric substrate.
19. The multiple-band MIMO antenna of claim 14 , wherein the first reference member comprises a U-shape defining an inner space, wherein a portion of the first elongate member is positioned in the inner space.
20. The multiple-band MIMO antenna of claim 14 , wherein the first reference member comprises a first arm, and a second arm perpendicularly coupled thereto, wherein the first arm has an L-shape, and wherein the second arm comprises a proximal portion coupled to the first arm and having an L-shape, and a distal portion extending away from the proximal portion.