| 摘要 |
A multi-band antenna ( 1 ) used in an electronic device and formed of a metallic sheet by defining holes therein, including a first radiating portion ( 30 ), a second radiating portion ( 31 ), a third radiating portion ( 32 ), a ground portion ( 2 ), and a coaxial transmission line ( 4 ). The first radiating portion, the ground portion and the coaxial transmission line cooperatively form a loop antenna operated at a higher frequency band of about 5.15-5.875 GHz. The second radiating portion, the ground portion and the coaxial transmission line cooperatively form a first inverted-F antenna operated at another higher frequency band of about 5.725-5.875 GHz. The third radiating portion, the ground portion and the coaxial transmission line cooperatively form a second inverted-F antenna operated at a lower frequency band of about 2.4-2.5 GHz.
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