TUNABLE MULTIBAND ANTENNA WITH PASSIVE AND ACTIVE CIRCUITRY
摘要
An electronic device may have an antenna for providing coverage in wireless communications bands of interest such as a low frequency communications band and a high frequency communications band. The antenna may have an antenna ground and an antenna resonating element. The antenna resonating element may have a high band arm that contributes to a first high band resonance in the high band and may have a low band arm that exhibits a low band resonance in the low band. A passive filter that is coupled between first and second portions of the antenna resonating element may be configured to exhibit a short circuit impedance associated with a bypass path that allows the antenna resonating element to contribute to a second high band resonance in the high band. A tunable inductor coupled to the antenna resonating element may be used to tune the low band resonance.
申请公布号
WO2014172077(A1)
申请公布日期
2014.10.23
申请号
WO2014US31680
申请日期
2014.03.25
申请人
APPLE INC.
发明人
JIANG, YI;YONG, SIWEN;COUTTS, GORDON;ZHANG, LIJUN;LI, QINGXIANG;SCHLUB, ROBERT, W.