| 摘要 |
In a radiation element comprising helical element (1), diode (2), and helical element (3), since helical element (1) is insulated from helical element (3) for a high-frequency signal when diode (2) is off, only helical element (1) operates as a radiation element. In the radiation element comprising helical element (1), diode (2), and helical element (3), since there is conductivity between helical elements (1) and (3) for a high-frequency when diode (2) is on, helical elements (1) and (3) operate as connected.
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