| 摘要 |
<p>Disclosed is an antenna with an extended electrical length, including radiators 110, 210, 310, 410 and 510 having S-shaped or spiral-shaped cells 112, 212, 312 and 512. The cells 112, 212, 312 and 512 are formed on the front surface of the boards 120, 220, 320, 420 and 520, and two or more of the cells are connected in series by connectors 114, 214 and 314 formed on the rear surface of the board. Furthermore, the antenna includes a ground stub 150 and a parasitic element 160 electromagnetically coupled to the radiators 110, 210, 310, 410 and 510, and has a good radiation characteristic. Furthermore, the antenna can include the cells 112, 212, 312 and 512 of different sizes and can thus have a multi-band characteristic.</p> |
