Low band dipole for high density multiband antennas
A low band dipole assembly has four dipole arms. Each of the dipole arms has an upper body, a plurality of cloaking tabs that protrude downward from either side of the upper body, and an end tab that extends downward from the upper body. Each of the dipole arms also has two mounting tabs that extend laterally from the dipole arm. The upper body has a plurality of cloaking slots, which provide for capacitive and inductive cloaking. Each of the four dipole arms may be formed of a single piece of sheet metal, such as aluminum. Each of the four dipole arms is configured to be transparent to RF (Radio Frequency) energy in the C-Band or Mid Band frequencies.
1 . A dipole assembly for a multi-band antenna, comprising:
a support pedestal;
a balun feed PCB (Printed Circuit Board) structure;
four dipole arms configured to radiate in a first frequency band, the four dipole arms arranged in a cross configuration, each of the four dipole arms having an upper body having a plurality of cloaking slots, wherein the upper body is coupled to a plurality of downward-pointing cloaking tabs disposed on either side of the upper body, the wherein the upper body has an outer end tab disposed at an outer end of the upper body, the outer end tab pointing downward, and wherein each of the four dipole arms has two mounting tabs, one disposed on each side, wherein each of the four dipole arms is mechanically coupled to the support pedestal and the balun feed PCB, and wherein each of the four dipole arms is electrically coupled to a corresponding signal trace on the balun feed PCB structure; and
a director mechanically coupled to the support pedestal and disposed above the four dipole arms.
2 . The dipole assembly of claim 1 , wherein each of the four dipole arms is formed of a single piece of sheet metal.
3 . The dipole assembly of claim 2 , wherein the sheet metal comprises aluminum.
4 . The dipole assembly of claim 1 , wherein the outer end tab extends laterally beyond the upper body.
5 . The dipole assembly of claim 1 , wherein the mounting tabs extend laterally from the corresponding dipole arm.
6 . The dipole assembly of claim 5 , wherein the mounting tabs extend laterally from a corresponding cloaking tab.