Soldier-mounted antenna
Embodiments of a wide band multi-polarization antenna system are described, which can be attached to the back or front of a soldier's vest or backpack. The antenna system can allow for release of pre-shaped integral radiating elements that spring into a geometric configuration suitable for circular polarization radiation or linear polarization over a desired band of frequencies. The antenna system can provide, when collapsed, linear polarized line-of sight capability over a wide band of frequencies. In a collapsed low-profile state, the antenna system can remain on the soldier, but out of the way for maneuvering.
1. An antenna comprising:
a support structure comprising:
a mast comprising a top portion, a bottom portion, a middle portion between the top portion and the bottom portion, and a sliding rod,
an end cap coupled to the sliding rod, and
a base coupled to the bottom portion of the mast; and
at least four antenna elements each shaped at least partially in a helix, a top end of each antenna element in the at least four antenna elements configured to couple to a bottom of the end cap, a bottom end of each antenna element in the at least four antenna elements configured to couple to a top of the base, the at least four antenna elements each twisted with a left-hand orientation;
wherein the sole mechanical connections of the at least four antenna elements with the support structure are at the bottom of the end cap and at the top of the base.
2. The antenna of claim 1 , wherein the at least four antenna elements comprise memory metal.
3. The antenna of claim 1 , wherein the at least four antenna elements comprise titanium.
4. The antenna of claim 1 , wherein the at least four antenna elements consist of four antenna elements.
5. The antenna of claim 1 , wherein the at least four antenna elements each have an amount of twist between about 90 degrees to about 270 degrees.
6. The antenna of claim 1 , wherein the at least four antenna elements each have an amount of twist of about 90 degrees.
7. The antenna of claim 1 , wherein the at least four antenna elements each have an amount of twist of about 180 degrees.
8. The antenna of claim 1 , wherein each antenna element in the at least four antenna elements has a same degree of twist.
9. The antenna of claim 1 , wherein the at least four antenna elements are driven with a same polarization as a direction of twist.
10. The antenna of claim 1 , wherein the at least four antenna elements are shaped in a quadrifilar helix.
11. The antenna of claim 1 , wherein the antenna is compatible with a Mobile User Objective System (MUOS).
12. The antenna of claim 11 , wherein the base comprises a diplexer configured to facilitate communications with the Mobile User Objective System (MUOS).
13. The antenna of claim 1 , wherein the antenna is configured to communicate with one or more satellites.
14. The antenna of claim 13 , wherein the antenna is further configured to communicate with line-of-site radios.
15. The antenna of claim 1 , wherein a bottom of the base is configured to be coupled to a flexible attachment mechanism.
16. The antenna of claim 1 , wherein the sliding rod is configured to slide up and down within the mast.
17. The antenna of claim 1 , wherein the base is a cylinder.
18. The antenna of claim 1 , wherein the end cap is a cylinder.
19. The antenna of claim 1 , wherein a diameter of the end cap is larger than a diameter of the mast.
20. The antenna of claim 1 , wherein a height of the mast is greater than a radius of the mast.