Flerbandsantennkomponent

摘要

An antenna component for implementing an internal multi-band antenna of a small-sized radio device. The antenna component (200) has a dielectric substrate (210), the conductive coating of which forms a radiating element (220). This has two resonances for forming two separate operating bands. The lower resonance is based on the entire element and the upper resonance on the head part (221) of the element as seen from the feed end. The conductive coating has a pattern, which functions as a parallel resonance circuit between the head part and the tail part (222) of the element. The natural frequency of this parallel resonance circuit is in the range of the upper operating band of the antenna. The resonance frequencies of the antenna and thus its operating bands can be tuned to the desired places independently of each other so that the tuning cycle need not be repeated. The structure is relatively simple and reliable.