Antenna radiator with pre-configured cloaking to enable dense placement of radiators of multiple bands
Disclosed is an antenna that enables dense packing of low band, mid band, and C-band radiators. The low band radiators have a plurality of dipole arms that minimize re-radiation of either RF energy emitted by either the mid band or C-Band radiators. In one embodiment, the dipole arms are formed of a two-dimensional structure that has a shape that substantially prevents re-radiation in both the mid band and the C-band. In another embodiment, the dipole arms have two different configurations: a first configuration optimized for preventing re-radiation in the mid band, and a second configuration optimized for preventing re-radiation in the C-Band. In the latter embodiment, the low band radiators in close proximity to the mid band radiators have dipole arms of the first configuration, and the low band radiators in close proximity to the C-Band radiators have dipole arms of the second configuration.
1. An antenna, comprising:
a plurality of low band radiators; and
a plurality of mid band radiators;
wherein each of the plurality of low band radiators includes a plurality of low band dipole arms, wherein each of the plurality of low band dipole arms has a two-dimensional structure, comprises a sheet of stamped metal, and includes an alternating sequence of capacitive choke segments and inductive choke segments, and wherein each of the low band dipole arms has a broken peripheral current path.
2. The antenna of claim 1 , further comprising a plurality of C-Band radiators.
3. The antenna of claim 1 , wherein the plurality of low band radiators are arranged in one or more first columns and the plurality of mid band radiators are arranged in a plurality of second columns, wherein the one or more first columns and the plurality of second columns are parallel.
4. The antenna of claim 2 , wherein the plurality of low band radiators are arranged in one or more first columns and the plurality of mid band radiators are arranged in a plurality of second columns and the plurality of C-Band radiators are arranged in a plurality of third columns, wherein the one or more first columns the plurality of second columns, and plurality of third are parallel, and wherein the plurality of second columns are disposed in a first antenna area and the plurality of third columns are disposed in a second antenna area, wherein the first antenna area and the second antenna area are adjacent along an elevation axis, and the at least one first column is disposed in the first antenna area and the second antenna area.
5. The antenna of claim 1 , wherein the stamped metal comprises aluminum.
6. The antenna of claim 1 , wherein the stamped metal comprises brass.
7. The antenna of claim 1 , wherein each of the plurality of low band dipole arms comprises a printed circuit board.
8. An antenna, comprising:
a plurality of mid band radiators;
a plurality of high band radiators; and
a plurality of low band radiators, wherein the plurality of low band radiators includes a first subset of low band radiators that are in close proximity to one or more of the plurality of mid band radiators and a second subset of low band radiators that are in close proximity to one or more of the plurality of high band radiators, wherein each of the low band radiators includes a plurality of low band dipole arms, each of the low band dipole arms having a central conductor, a mantle disposed on an outer surface of the central conductor, and a conductive pattern disposed on an outer surface of the mantle, wherein the low band radiators in the first subset of low band radiators have a first conductive pattern, and the low band radiators in the second subset of low band radiators have a second conductive pattern, wherein the first conductive pattern is different from the second conductive pattern, wherein the first conductive pattern is configured to prevent a mid band re-radiation and the second conductive pattern is configured to prevent a high band re-radiation.
9. The antenna of claim 8 , wherein the mantle is concentric to the central conductor.
10. The antenna of claim 8 , wherein the mantle comprises Teflon.
11. The antenna of claim 8 , wherein the central conductor comprises a conductive tube.
12. The antenna of claim 8 , wherein the high band comprises a C-Band.
13. The antenna of claim 1 , wherein the low band dipole arms do not comprise a pcb substrate.
14. The antenna of claim 1 , wherein the low band dipole arms are freestanding.
15. The antenna of claim 14 , further comprising a passive support structure underlying the freestanding dipoles.
16. The antenna of claim 1 , wherein capacitive choke elements and the inductive choke elements are provided by shapes of the sheet of stamped metal.
17. The antenna of claim 1 , wherein the each of the low band dipole arms does not have a conductive trace along its length.
18. The antenna of claim 1 , wherein each of a plurality of the low band radiators includes a passive radiator.