| 摘要 |
An antenna means enabling operation of a portable radio communication device within two separated frequency bands, for example, at 900 MHz and 1800 MHz. The antenna means comprises a feed portion coupled to circuitry of the portable radio communication device, first and second helical elements wound on a common core, coaxially and longitudinally coextending. The coils are galvanically separated except possibly at one end, they each have one free end and at least one of the coils is coupled directly to circuits of the portable radio communication device. |
