| 摘要 |
A multi-band radio antenna device ( 1 ) for a radio communication terminal, comprising a flat ground substrate ( 20 ), a flat main radiating element ( 2, 9 ) having a radio signal feeding point ( 3 ), and a flat parasitic element ( 5, 6 ). The main radiating 5 element is located adjacent to and in the same plane as said ground substrate, and preferably dielectrically separated therefrom. The antenna device is suitable for being used as a built-in antenna in portable radio terminals, such as a mobile phone ( 30 ).
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