Multicoil helical antenna and method for same

Abstract

A helical antenna is provided that simultaneously resonates at a plurality of frequencies. This antenna comprises a first coil having a first end for termination in a transmission line feed port. A second coil has a first end connected to the first coil second end, and an unterminated second end. In some aspects, a third coil is used, connected to the second coil second end, with an unterminated end. The coils have axial lengths, a wire gauge, and a coil diameter. The axial lengths are approximately equal to a number of turns times a spacing between turns. In addition, the antenna further comprises a first dielectric encompassed by the first and second coils and a second dielectric that encompasses the first and second coils. The antenna resonates at a first frequency and a second frequency, non-harmonically related to the first frequency, in response to the first and second coils.

Dependencies are inferred from the claim text.