Patent ID: 7408515

Claim:
A mobile communication device comprising radio frequency (RF) circuitry and an antenna assembly, wherein the RF circuitry has first and second RE signal ports and the antenna assembly includes a first single-ended antenna having an elongate radiator structure which is connected to the first port, and a second antenna having at least one radiating element and a balun which provides a balanced feed for the radiating element, the second antenna forming a distal portion of the elongate radiator structure of the first antenna at a position spaced from the connection of the radiator structure to the first signal port, wherein the elongate radiator structure of the first antenna acts as a feed path for the second antenna, which feed path extends along the radiator structure between the balun and the second signal port, and wherein the second antenna has an electrically insulative core of a solid material having a relative dielectric constant greater than 5, the said at least one radiating element being disposed on or adjacent the outer surface of the core.