| 摘要 |
A multi-resonant and multi-feed small antenna is provided to transmit and receive a signal in a multi-band by using a plurality of feed terminals to generate a plurality of resonant frequencies independently. A multi-resonant and multi-feed small antenna includes an antenna element unit(301), a plurality of feed units(303,305,307), and a feed switch unit(309). The plurality of feed units feed power to the antenna element unit. The feed switch unit selectively connects any one of the feed units to the antenna element unit so as to feed power to the antenna element unit. The plurality of feed units are arranged to change the length of the antenna element unit respectively. A maximum radius of the antenna is less than a 1/4 wavelength. The antenna element unit is a PIFA(Planar Inverted-F Antenna) element, a meander type antenna element, a helical antenna element, a spring type loop antenna element, an STLA(Spiral Top Loaded Monopole Antenna) element, a capacitor-plate antenna element, a multi-element top-loaded monopole antenna element, or an inverted-F antenna element. |
