A sector-splitting twin beam base station antenna, comprising: an angled reflector having a first planar panel and a second planar panel that is angled with respect to the first planar panel; a first array that includes a first plurality of radiating elements that are mounted to extend forwardly from the first planar panel, where the radiating elements of the first plurality of radiating elements extend in three vertically-extending columns (720-1, 720-2, 720-3) of the first array, and the radiating elements in the middle of the three vertically-extending columns of the first array are vertically offset from the radiating elements in the other two of the three vertically-extending columns (720-1, 720-3) of the first array; a second array that includes a second plurality of radiating elements that are mounted to extend forwardly from the second planar panel, where the radiating elements of the second plurality of radiating elements extend in three vertically-extending columns (720-4, 720-5, 720-6) of the second array, and the radiating elements in the middle of the three vertically-extending columns of the second array are vertically offset from the radiating elements in the other two of the three vertically-extending columns (720-4, 720-6) of the second array; a first phase shifter having an input and a plurality of first phase shifter outputs; a second phase shifter having an input and a plurality of second phase shifter outputs; wherein more than half of the first phase shifter outputs are connected to respective ones of a plurality of first sub-arrays, where each first sub-array includes a total of three radiating elements that comprise one radiating element from each of the three columns (720-1, 720-2, 720-3) in the first array, wherein more than half of the second phase shifter outputs are connected to respective ones of a plurality of second sub-arrays, where each second sub-array includes a total of one radiating element from each of the three columns (720-4, 720-5, 720-6) in the second array, and wherein the first and second arrays are each configured to generate antenna beams having azimuth half power beamwidths (HPBW) of about 33 0. an angled reflector having a first planar panel and a second planar panel that is angled with respect to the first planar panel; a first array that includes a first plurality of radiating elements that are mounted to extend forwardly from the first planar panel, where the radiating elements of the first plurality of radiating elements extend in three vertically-extending columns (720-1, 720-2, 720-3) of the first array, and the radiating elements in the middle of the three vertically-extending columns of the first array are vertically offset from the radiating elements in the other two of the three vertically-extending columns (720-1, 720-3) of the first array; a second array that includes a second plurality of radiating elements that are mounted to extend forwardly from the second planar panel, where the radiating elements of the second plurality of radiating elements extend in three vertically-extending columns (720-4, 720-5, 720-6) of the second array, and the radiating elements in the middle of the three vertically-extending columns of the second array are vertically offset from the radiating elements in the other two of the three vertically-extending columns (720-4, 720-6) of the second array; a first phase shifter having an input and a plurality of first phase shifter outputs; a second phase shifter having an input and a plurality of second phase shifter outputs; wherein more than half of the first phase shifter outputs are connected to respective ones of a plurality of first sub-arrays, where each first sub-array includes a total of three radiating elements that comprise one radiating element from each of the three columns (720-1, 720-2, 720-3) in the first array, wherein more than half of the second phase shifter outputs are connected to respective ones of a plurality of second sub-arrays, where each second sub-array includes a total of one radiating element from each of the three columns (720-4, 720-5, 720-6) in the second array, and wherein the first and second arrays are each configured to generate antenna beams having azimuth half power beamwidths (HPBW) of about 33 0.