Patent ID: 9362614
Filing Date: 2016-06-07
CPC Classification: H01Q

Claim Text:
1. A minimum cavity depth antenna, comprising: a dielectric substrate having an upper side, a lower side, and an outward edge; a spiral antenna having first and second antenna arms mounted on said dielectric substrate; a metallic ring formed around said first and second antenna arms, wherein said metallic ring is mounted on said outward edge of said dielectric substrate and extends around said outward edge and adjacent to said lower side of said dielectric substrate; wherein each of said first and second antenna arms have logarithmic spiral antenna arm geometry from the center of said dielectric substrate out to about 2.6 inch radius, and wherein from about 2.6 inch radius, said first and second antenna arms transition to Archimedean spiral arms having arms about 0.2 inch arm width and 0.2 inch arm spacing; wherein said first antenna arm is resistively-terminated at a first resistor, wherein said second antenna arm is resistively-terminated at a second resistor, wherein said first and second resistors are connected to said metallic ring; an antenna cavity cone having an outer surface, an inner surface, and a bottom lip, wherein an antenna cavity cone cap is adjacent to said outer surface of said antenna cavity cone, wherein said antenna cavity cone cap is attached to said lower side of said dielectric substrate; a tapered microstrip balun circuit having a proximal end and a distal end, wherein said tapered microstrip balun circuit is electrically-connected to said first and second antenna arms at said proximal end; a bottom plate attached to said bottom lip of said antenna cavity cone; a wall ring connecting said bottom plate to said metallic ring; and a connector cap mounted on the lower side of said bottom plate, wherein said connector cap is electrically-connected to said distal end of said tapered microstrip balun circuit.