MOBILE WIRELESS COMMUNICATIONS DEVICE WITH MULTIPLE-BAND ANTENNA AND RELATED METHODS
A mobile wireless communications device may include a housing, a wireless transceiver carried by the housing, and a multiple-band antenna carried by the housing and coupled to the wireless transceiver. The multiple-band antenna may include a first radiator comprising a radiator element and a parasitic element adjacent to the radiator element. The parasitic element may be selectively switchable between floating and grounded states. The multiple-band antenna may include a second radiator insulated from the first radiator.
1 . A mobile wireless communications device comprising:
a housing;
at least one wireless transceiver carried by said housing; and
a multiple-band antenna carried by said housing and coupled to said at least one wireless transceiver, said multiple-band antenna comprising
a first radiator comprising a radiator element and a parasitic element adjacent thereto, said parasitic element being selectively switchable between floating and grounded states, and
a second radiator insulated from said first radiator.
2 . The mobile wireless communications device of claim 1 wherein said multiple-band antenna comprises a dielectric substrate supporting said first and second radiators.
3 . The mobile wireless communications device of claim 2 wherein said dielectric substrate has a non-planar shape.
4 . The mobile wireless communications device of claim 2 wherein said dielectric substrate is carried by a bottom of said housing; and wherein said first and second radiators are carried by respective opposing first and second sides of said dielectric substrate.
5 . The mobile wireless communications device of claim 1 wherein said second radiator comprises first and second branches coupled together with a T-shaped slot therebetween.
6 . The mobile wireless communications device of claim 5 wherein said second radiator comprises a feed connection on said first branch, and a reference voltage connection on said second branch.
7 . The mobile wireless communications device of claim 5 wherein said T-shaped slot opens outwardly and between said first and second branches.
8 . The mobile wireless communications device of claim 1 wherein said radiator element comprises a first branch extending alongside said parasitic element, and a second branch extending outwardly from said first branch.
9 . The mobile wireless communications device of claim 8 wherein said second branch has a bend in a medial portion thereof.
10 . The mobile wireless communications device of claim 8 wherein said radiator element comprises a feed connection on said first branch.
11 . The mobile wireless communications device of claim 1 wherein said parasitic element has a rectangular shape.
12 . A multiple-band antenna for a mobile wireless communications device comprising a housing, and at least one wireless transceiver carried by the housing, said multiple-band antenna comprising:
a first radiator comprising a radiator element and a parasitic element adjacent thereto, said parasitic element being selectively switchable between floating and grounded states; and
a second radiator insulated from said first radiator.
13 . The multiple-band antenna of claim 12 further comprising a dielectric substrate supporting said first and second radiators.
14 . The multiple-band antenna of claim 13 wherein said dielectric substrate has a non-planar shape.
15 . The multiple-band antenna of claim 13 wherein said dielectric substrate is carried by a bottom of the housing;
and wherein said first and second radiators are carried by respective opposing first and second sides of said dielectric substrate.
16 . The multiple-band antenna of claim 12 wherein said second radiator comprises first and second branches coupled together with a T-shaped slot therebetween.
17 . The multiple-band antenna of claim 16 wherein said second radiator comprises a feed connection on said first branch, and a reference voltage connection on said second branch.
18 . The multiple-band antenna of claim 16 wherein said T-shaped slot opens outwardly and between said first and second branches.
19 . The multiple-band antenna of claim 12 wherein said radiator element comprises a first branch extending alongside said parasitic element, and a second branch extending outwardly from said first branch.
20 . A method of making a mobile wireless communications device comprising:
forming a multiple-band antenna to comprise
a first radiator comprising a radiator element and a parasitic element adjacent thereto, the parasitic element being selectively switchable between floating and grounded states, and
a second radiator insulated from the first radiator;
coupling at least one wireless transceiver to be carried by a housing; and
coupling the multiple-band antenna to be carried by the housing and to the at least one wireless transceiver.
21 . The method of claim 20 wherein forming the multiple-band antenna comprises forming a dielectric substrate to support the first and second radiators.
22 . The method of claim 21 wherein forming the multiple-band antenna comprises forming the dielectric substrate to have a non-planar shape.
23 . The method of claim 21 further comprising coupling the dielectric substrate to be carried by a bottom of the housing, and coupling the first and second radiators to be carried by respective opposing first and second sides of the dielectric substrate.
24 . The method of claim 20 wherein forming the multiple-band antenna comprises forming the second radiator to comprise first and second branches coupled together with a T-shaped slot therebetween.
25 . The method of claim 24 wherein forming the multiple-band antenna comprises forming the second radiator to comprise a feed connection on the first branch, and a reference voltage connection on the second branch.