Frequency-scaled ultra-wide spectrum element
An antenna element including a base plate, a first ground clustered pillar projecting from the base plate, a second ground clustered pillar projecting from the base plate and spaced apart from a first side of the first ground clustered pillar, a first ground member projecting from the base plate between the first ground clustered pillar and the second ground clustered pillar, wherein a distal end of the first ground member is configured to capacitively couple to the second ground clustered pillar, and a first signal member projecting from the base plate between the first ground clustered pillar and the first ground member, wherein the first signal member is electrically insulated from the base plate, the first ground clustered pillar, and the first ground member, and a distal end of the first signal member is configured to capacitively couple to the first ground clustered pillar.
1. A phased array antenna comprising:
a base plate;
a clustered pillar projecting from the base plate, wherein the clustered pillar is electrically connected to the base plate and comprises first and second projecting portions;
a first radiating element projecting from the base plate and configured to capacitively couple to the clustered pillar, wherein the first radiating element at least partially wraps around the first projecting portion; and
a second radiating element projecting from the base plate and configured to capacitively couple to the clustered pillar, wherein the second radiating element at least partially wraps around the second projecting portion.
2. The antenna element of claim 1 , wherein the phased array antenna is configured to transmit or detect RF signals over a bandwidth ratio of at least 2:1.
3. The antenna element of claim 1 , wherein the antenna is configured to have an average voltage standing wave ratio of less than 5:1.
4. The antenna element of claim 1 , wherein the antenna is configured to have an average voltage standing wave ratio of less than 5:1 over a scan volume of at least 30 degrees from broadside.
5. The antenna of claim 1 , wherein the first radiating element is conductively coupled to the base plate and the second radiating element is conductively isolated from the base plate.
6. The antenna of claim 1 , wherein the first radiating element is oriented along a first plane and the second radiating element is oriented along a second plane that is transverse to the first plane.
7. The antenna of claim 1 , wherein the first radiating element is supported by a stem portion of the radiating element that is inserted into the base portion.
8. The antenna of claim 1 , further comprising a dielectric material separating at least a portion of the clustered pillar from at least a portion of the first radiating element.
9. The antenna of claim 8 , wherein the dielectric material is a coating on the clustered pillar.
10. The antenna of claim 8 , wherein the dielectric material is a sleeve covering at least the portion of the clustered pillar.
11. The antenna of claim 1 , further comprising a third radiating element projecting from the base plate, wherein the first radiating element is located between the third radiating element and the clustered pillar.
12. The antenna of claim 11 , wherein the first radiating element and the third radiating element are coplanar.
13. The antenna of claim 1 , further comprising a dielectric plug inserted into the base plate for affixing the first radiating element to the base plate.
14. The antenna of claim 13 , wherein the dielectric plug comprises a connector for connecting a signal line to the first radiating element.
15. The antenna of claim 1 , wherein the entire first radiating element is formed of conductive material.