| 摘要 |
PROBLEM TO BE SOLVED: To use the antenna for two frequency bands or over apart from each other. SOLUTION: An upper end of a straight line whip antenna element 2 is inserted to a lower end of a parasitic antenna coil element 1, then the whip antenna element 2 and the parasitic antenna element 1 are insulated but coupled electromagnetically. A signal source 5 is connected to the lower end of the whip antenna element 2 to energize it, then the antenna is resonated at two frequency bands apart from each other. |
