Patent ID: 8749439

Claim:
An apparatus, comprising: a first antenna system, comprising: an outer cylindrical metal sleeve having an outer sleeve opening and an outer diameter; a monopole antenna coaxially located inside the outer cylindrical metal sleeve, the monopole antenna having a top section that extends above the outer sleeve opening and a bottom section that extends below the outer sleeve opening into the outer cylindrical metal sleeve; and a ferrite sleeve that penetrates the outer cylindrical metal sleeve through the outer sleeve opening, the ferrite sleeve covering the top section and a portion of the bottom section of the monopole antenna; and a second antenna system, comprising: a plurality of annular ring patch antennas, each of the annular ring patch antennas formed in a respective dielectric substrate, the plurality of annular ring patch antennas concentrically stacked in parallel planes and having a common inner radius, wherein the outer diameter of the outer cylindrical metal sleeve of the first antenna system and the common inner radius of the plurality of annular ring patch antennas of the second antenna system are configured such that the second antenna system encircles and fits to the first antenna system at a base portion of the outer cylindrical metal sleeve.