초록 ▼

According to one embodiment of the invention, a radome cover for an RF sensor has been provided. The radome cover comprises a first and a second ballistic layer, each ballistic layer having a ceramic layer. The two ballistic layers are sandwiched between at least two matching layers, and the matchin

According to one embodiment of the invention, a radome cover for an RF sensor has been provided. The radome cover comprises a first and a second ballistic layer, each ballistic layer having a ceramic layer. The two ballistic layers are sandwiched between at least two matching layers, and the matching layers are impedance matched to the ceramic layers. The radome cover provides ballistic protection for the RF sensor.

대표청구항 ▼

1. A radio frequency assembly comprising: a radome cover, comprising: a first and second ballistic layer, the first ballistic layer comprising a first ceramic layer, the second ballistic layer comprising a second ceramic layer, each ceramic layer having a dielectric constant greater than six, andat

1. A radio frequency assembly comprising: a radome cover, comprising: a first and second ballistic layer, the first ballistic layer comprising a first ceramic layer, the second ballistic layer comprising a second ceramic layer, each ceramic layer having a dielectric constant greater than six, andat least two matching layers, the first and the second ballistic layers being sandwiched between the at least two matching layers, the at least two matching layers impedance matched to the first and the second ballistic layers for a frequency band;backing plates disposed between the first and second ceramic layers and between one of the first and second ceramic layers and a proximal one of the at least two matching layers; andat least one radio frequency component disposed beneath the radome cover,wherein the first and second ceramic layers have a dielectric constant greater than 6, the at least two matching layers have a dielectric constant of less than 3.5 and the backing plates have a dielectric constant between 3 and 7. 2. The radio frequency assembly of claim 1, wherein each of the at least two matching layers has an average dielectric constant less than 3.5. 3. The radio frequency assembly of claim 1, wherein each ceramic layer has a dielectric constant greater than or equal to nine. 4. The radio frequency assembly of claim 1, wherein the first ceramic layer comprises alumina. 5. The radio frequency assembly of claim 4, wherein the second ceramic layer comprises silicon nitride. 6. The radio frequency assembly of claim 1, wherein the at least two matching layers comprise polyethylene. 7. The radio frequency assembly of claim 1, wherein the radome cover further comprises: a reinforcement layer operable to dissipate kinetic energy. 8. The radio frequency assembly of claim 1, wherein the first ceramic layer and the second ceramic layer are approximately equal in thickness. 9. The radio frequency assembly of claim 1, wherein the first ceramic layer is approximately three times the thickness of the second ceramic layer. 10. The radio frequency assembly of claim 1, wherein at least one of the first and second ceramic layers is up to about 12 times thicker than each of the at least two matching layers and up to about 3.75 times thicker than each of the backing plates. 11. The radio frequency assembly of claim 1, further comprising adhesive disposed between adjacent layers and between layers adjacent to backing plates, wherein at least one of the first and second ceramic layers is up to about 150 times thicker than the adhesive. 12. A radome cover comprising: a first and a second ceramic layer;at least two matching layers, the first and second ceramic layers sandwiched between the at least two matching layers, the at least two matching layers impedance matched to the first and second ceramic layers over a frequency band; andbacking plates disposed between the first and second ceramic layers and between one of the first and second ceramic layers and a proximal one of the at least two matching layers,wherein the first and second ceramic layers have a dielectric constant greater than 6, the at least two matching layers have a dielectric constant of less than 3.5 and the backing plates have a dielectric constant between 3 and 7. 13. The radome cover of claim 12, wherein at least one of the ceramic layers comprises alumina;the first and second ceramic layers each have a dielectric constant greater than six;the at least two matching layers has an average dielectric constant less than 3.5. 14. The radome cover of claim 12, wherein at least one of the ceramic layers comprises alumina. 15. The radome cover of claim 12, wherein at least one of the ceramic layers comprises silicon nitride. 16. The radome cover of claim 12, wherein the at least two matching layers comprise polyethylene. 17. The radome cover of claim 12, further comprising: a reinforcement layer operable to dissipate kinetic energy. 18. The radome cover of claim 12, wherein at least one of the ceramic layers has a dielectric constant greater than six. 19. The radome cover of claim 18, wherein each of the at least two matching layers has an average dielectric constant less than or equal to 3.5. 20. The radome cover of claim 18, wherein at least one of the ceramic layers has a dielectric constant greater than or equal to 9.8. 21. The radome cover of claim 12, wherein the first ceramic layer is approximately the same thickness as the second ceramic layer. 22. The radome cover of claim 12, wherein the first ceramic layer is approximately three time the thickness of the second ceramic layer. 23. A method of creating radome cover, the method comprising: selecting a first and a second ceramic layer;selecting at least two matching layers that are impedance matched to the first and second ceramic layers;coupling the first and the second ceramic layers between the at least two matching layers; anddisposing backing plates between the first and second ceramic layers and between one of the first and second ceramic layers and a proximal one of the at least two matching layers,wherein the first and second ceramic layers have a dielectric constant greater than 6, the at least two matching layers have a dielectric constant of less than 3.5 and the backing plates have a dielectric constant between 3 and 7. 24. The method of claim 23, wherein at least one of the ceramic layers comprises alumina,selecting a first and a second ceramic layer comprises selecting a first ceramic layer thickness and a second ceramic layer thickness,the at least two matching layers comprise polyethylene; andselecting the at least two matching layers comprises selecting a thickness of each of the at least two matching layers.