Abstract Disclosed is a small, compact, efficient antenna that uses practically no space and is employed on the tip of a projectile. The antenna is in the form of a nose cone body having an electrically conductive inner surface. The electrically coated inner surface extends around the base of the nose cone body and partially coats the outside of the nose cone and forms a band of conductive coating at the base thereof. The antenna is excited by a coaxial probe connected to the metal coating on the inside of the nose cone. Diametrically opposite the input for the coaxial probe a deep post is located across the cavity at its center in order to provide a short circuit. The excited antenna radiates along the tapered dielectric cone (the portion that is not coated) and couples to free space.
A cavity excited dielectric radiator comprising a body of dielectric matter having a outer surface and inner surface, said inner surface having a skin of conductive material affixed thereto, said outer surface having a partial covering of skin of similar conductive material, said skin on said outer surface being connected to said skin on said inner surface, and further comprising an electromagnetic energy input means affixed to said inner conductive skin and a shorting post imbedded in said dielectric matter and located diametrically opposite to said means wherein said shorting post connects said outer skin to said inner skin.
Claim 2
Dependent Claim
99 words
A cavity excited dielectric radiator comprising a body of dielectric matter having a outer surface and inner surface, said inner surface having a skin of conductive material affixed thereto, said outer surface having a partial covering of skin of similar conductive material, said skin on said outer surface being connected to said skin on said inner surface, and further comprising an electromagnetic energy input means affixed to said inner conductive skin and a shorting post imbedded in said dielectric matter and located diametrically opposite to said means wherein said shorting post connects said outer skin to said inner skin.
Claim 3
Dependent Claim
23 words
The radiator of claim 1 wherein said body of dielectric matter is a nose cone for a projectile, said cone having a base.
Claim 4
Dependent Claim
31 words
The radiator of claim 2 wherein said outer skin is a uniform band of conductive coating extending around said body and covering said body from said base to a distance L.
Claim 5
Dependent Claim
14 words
The radiator of claim 3 wherein said shorting post comprises a thin metal rod.
Claim 6
Dependent Claim
16 words
The radiator of claim 4 wherein said input means is a 50 ohm coaxial input connector.
Claim 7
Dependent Claim
13 words
The radiator of claim 3 wherein said shorting post is a conductive filling.
Claim 8
Dependent Claim
21 words
The radiator of claim 3 wherein said skins are extremely thin with respect to the wall thickness of said dielectric body.