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    • 5. 发明授权
    • Multi-band antenna for wireless applications
    • 用于无线应用的多频带天线
    • US07268731B2
    • 2007-09-11
    • US10895813
    • 2004-07-20
    • Bing ChiangMichael J. LynchDouglas H. Wood
    • Bing ChiangMichael J. LynchDouglas H. Wood
    • H01Q1/24
    • H01Q1/243H01Q5/357H01Q5/364H01Q9/40H01Q9/42
    • A folded monopole antenna that supports lower and upper frequency bands may be used in CDMA, WLAN, or other wireless communications systems. The folded monopole antenna may be located in a handset next to a vertical ground plane. The folded monopole antenna may be folded at least twice and connected to the ground plane through a reactance. The dimensions of different sections of the folded monopole antenna define lower and upper frequency band characteristics, and an offset location of an input feed affects the bandwidth of the frequency bands. The reactance between the antenna and ground plane can be selected to fine tune the frequency bands. Various input feeds, including a co-planar waveguide, may be employed. Dynamically adjustable reactances may be used in the input feed and ground line for adapting the antenna to various environments.
    • 支持较低和较高频带的折叠式单极天线可用于CDMA,WLAN或其他无线通信系统。 折叠的单极天线可以位于靠近垂直接地平面的手机中。 折叠的单极天线可以折叠至少两次,并通过电抗连接到接地平面。 折叠单极天线的不同部分的尺寸限定较低和较高的频带特性,并且输入馈送的偏移位置影响频带的带宽。 可以选择天线和接地平面之间的电抗来微调频带。 可以采用包括共面波导在内的各种输入馈送。 可以在输入进给和接地线中使用动态可调电抗,以使天线适应各种环境。