ULTRA WIDE BAND MONOPOLE INTERNAL ANTENNA

摘要

A multi-band built-in antenna is provided to obtain a broadband characteristic by using the coupling matching when designing the multi band. A multi-band built-in antenna includes a substrate(100), an impedance matching/feeding unit(104) and a first radiation member(102). The impedance matching/feeding unit is formed on the substrate. The first radiation member is combined in the impedance matching/feeding unit. The impedance matching/feeding unit includes a first matching member(120) and a second matching member(130). The first matching member is connected to the ground. The second matching member is electrically connected to the feeding point. The separation distance between the matching member and the second matching member is partially changed. The first matching member and the second matching member perform the impedance matching by the coupling.