A base station antenna, comprising: a first reflector structure having first and second generally opposed sides ; a first array of radiating elements that are mounted to extend outwardly from the first side of the first reflector structure and a second array (220 or 240) of radiating elements (222 or 242) that are mounted to extend outwardly from the second side of the first reflector structure ; a second reflector structure having third and fourth generally opposed sides ; and a third array of radiating elements that are mounted to extend outwardly from the third side of the second reflector structure and a fourth array of radiating elements that are mounted to extend outwardly from the fourth side of the second reflector structure , wherein the first side (214-1) is a first distance from the second side (214-3) and the third side (218-1) is a second distance from the fourth side (218-3), wherein the second distance is different from the first distance, wherein the first reflector structure and the second reflector structure each extend about a common longitudinal axis, wherein the first reflector structure has a first transverse cross-section and the second reflector structure has a second transverse cross-section that is different from the first transverse cross-section, wherein a first perimeter of the first transverse cross-section is different than a second perimeter of the second transverse cross-section, and wherein the arrays of radiating elements that are mounted to extend outwardly from the first reflector structure are configured to operate in a first frequency band and the arrays of radiating elements that are mounted to extend outwardly from the second reflector structure are configured to operate in a second frequency band, and wherein the second perimeter is greater than the first perimeter, the base station antenna being characterized in that the second frequency band is at higher frequencies than the first frequency band. a first reflector structure having first and second generally opposed sides ; a first array of radiating elements that are mounted to extend outwardly from the first side of the first reflector structure and a second array (220 or 240) of radiating elements (222 or 242) that are mounted to extend outwardly from the second side of the first reflector structure ; a second reflector structure having third and fourth generally opposed sides ; and a third array of radiating elements that are mounted to extend outwardly from the third side of the second reflector structure and a fourth array of radiating elements that are mounted to extend outwardly from the fourth side of the second reflector structure , wherein the first side (214-1) is a first distance from the second side (214-3) and the third side (218-1) is a second distance from the fourth side (218-3), wherein the second distance is different from the first distance, wherein the first reflector structure and the second reflector structure each extend about a common longitudinal axis, wherein the first reflector structure has a first transverse cross-section and the second reflector structure has a second transverse cross-section that is different from the first transverse cross-section, wherein a first perimeter of the first transverse cross-section is different than a second perimeter of the second transverse cross-section, and wherein the arrays of radiating elements that are mounted to extend outwardly from the first reflector structure are configured to operate in a first frequency band and the arrays of radiating elements that are mounted to extend outwardly from the second reflector structure are configured to operate in a second frequency band, and wherein the second perimeter is greater than the first perimeter, the base station antenna being characterized in that the second frequency band is at higher frequencies than the first frequency band. <EOS>