Linearly polarised monobloc antenna and mobile terminal of cellular radiotelephony comprising such an antenna

摘要

The antenna comprises a wire element 2 comprising of two sections. The first section 2 is straight and is attached to the device, e.g. cellular telephone at position 5. The second section (4) is spiral in shape and is a continuation of the first section 2. The antenna acts as a broadband antenna that can be used in multiple bands, the total length of the antenna wire setting a low tunning frequency and the spiral profile setting a high tunning frequency. The antenna is also not sensitive to environmental interference.