| 摘要 |
The present invention relates to a device at antenna systems for generating radio waves, whereby the antenna system includes a supporting structure on which there is provided at least one main radiator (3) for transmitting radio waves and whereby high-frequency electric currents are generated in the supporting member when the main radiator (3) is activated to transmit radio waves. In order to improve by simple means the range of the main radiator (3) and at the same time reduce its radiation backwards, the supporting structure includes a secondary radiator (14) for each main radiator (3), which secondary radiator (14) has at least one break portion (12) for interrupting or breaking the high-frequency electric currents generated therein and through the thereby interrupted flow of the high-frequency electric currents in the supporting structure reduce deviations from the desired range and/or direction of the radio waves transmitted by the main radiator (3), whereby the secondary radiator (14) includes a connecting means (13) which is provided to connect portions of the supporting structure located on opposite sides of the break portion (12) which each other on an inner side relative to said break portion (12), and whereby the connecting means (13) is provided to impart a flow path to the high-frequency electric currents flowing through the supporting structure such that the energy represented by said currents permits the secondary radiator (14) to transmit radio waves with a suitable amplitude and phase relative to the amplitude and phase of the radio waves transmitted by the main radiator (3). <IMAGE> |
