Patent ID: 7242356
Filing Date: 2007-07-10
Classification: H01Q

Abstract:
1. An antenna assembly for use in a mobile phone for transmitting and receiving wireless signals, the mobile phone including at least one first base board and a switching unit for determining whether the mobile phone is in a first operating mode or a second operating mode, the antenna assembly comprising: a radiating metal strip fabricated on the first base board, and having a feeding leg and a short-circuit leg; a matching circuit fabricated on the first base board and coupled electrically to the short-circuit leg in order to provide an impedance matching for the antenna assembly; wherein, when the mobile phone is disposed in the first operating mode, the switching unit causes disengagement of the short-circuit leg with respect to the ground, thereby turning the antenna assembly to a monopole type antenna, and when the mobile phone is disposed in the second operating mode, the switching unit causes engagement of the short-circuit leg with respect to the ground, thereby turning the antenna assembly to an inverted F-type antenna such that either in the first operating mode or the second operating mode, the antenna assembly has similar characteristic by virtue of the impedance matching provided by the matching circuit.