| 摘要 |
A radio unit comprises an antenna arrangement (200) capable of supporting multiple frequency bands. The antenna arrangement (200) comprises a first resonator (201) and a second resonator (207) tuned to different frequency bands. The second resonator (207) comprises a coupling section (209) which has a transformer coupling to the first resonator (201) and which effectively couples a signal between the first and second resonator (201,207) The second radiator may also in clude a radiating section (211) which effectively transmits or receives the radio signal and a coupling section (209). The first and second resonators (201,207) are galvanically isolated from each other. A radio frequency signal is fed to or taken from an antenna connector (205) connected to the first resonator (201). The coupling between the first resonator (201) and the second resonator (207) provides a transformer effect for transferring the signal between the resonators (201,207). <IMAGE> |
