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    • 2. 发明授权
    • Foursquare antenna radiating element
    • 四方天线辐射元件
    • US5926137A
    • 1999-07-20
    • US885837
    • 1997-06-30
    • J. Randall Nealy
    • J. Randall Nealy
    • H01Q9/04H01Q21/24H01Q21/00H01Q1/40H01Q1/42
    • H01Q9/045H01Q21/24H01Q21/245H01Q9/0407
    • A foursquare dual polarized moderately wide bandwidth antenna radiating element is provided which, due to its small size and low frequency response, is well suited to array applications. The foursquare element comprises a printed metalization on a low-loss substrate suspended over a ground plane reflector. Dual linear (i.e., horizontal and vertical), as well as circular and elliptical polarizations of any orientation may be produced with the inventive foursquare element. Further, an array of such elements can be modulated to produce a highly directive beam which can be scanned by adjusting the relative phase of the elements. Operation of the array is enhanced because the individual foursquare elements are small as compared to conventional array element having comparable frequency response. The small size allows for closer spacing of the individual elements which facilitates scanning. Bandwidths of 1.5:1 or better may be obtained with a feed point impedance of 50 Ohms. Good performance is obtained with the foursquare element having a size of 0.36 .lambda.. Also the foursquare element impedance degrades gradually.
    • 提供了一种四平方双极化中宽带宽天线辐射元件,由于其小尺寸和低频响应,非常适合阵列应用。 四方形元件包括在悬挂在接地平面反射器上的低损耗衬底上的印刷金属化。 可以利用本发明的四方形元件来产生双线性(即,水平和垂直)以及任何方位的圆形和椭圆偏振。 此外,可以调制这种元件的阵列以产生可以通过调节元件的相对相位来扫描的高度指向的光束。 与具有可比较的频率响应的常规阵列元件相比,单个四方形元件较小,从而增强阵列的操作。 小尺寸允许各个元件的更紧密的间隔,这便于扫描。 当馈电点阻抗为50欧姆时,可以获得1.5:1或更好的带宽。 使用尺寸为0.36λ的四方形元件可获得良好的性能。 四方形阻抗也逐渐降低。
    • 3. 发明授权
    • Reduced operator emission exposure antennas for safer hand-held radios
and cellular telephones
    • 减少操作员发射天线,以便更安全的手持式收音机和蜂窝电话
    • US5541609A
    • 1996-07-30
    • US400583
    • 1995-03-08
    • Warren L. StutzmanJ. Randall Nealy
    • Warren L. StutzmanJ. Randall Nealy
    • H01Q1/24
    • H01Q1/245H01Q21/10H01Q9/20
    • An antenna for a personal communication device designed for reducing RF emissions to a user's head and body comprises a single half-wave dipole antenna element mounted on the top of a telescoping rod such that the antenna element is raised above the user's head when the rod is extended. The rod is completely inactive and serves only to elevate the active antenna element above the user's head and away from the body. A built-in switch is provided which reduces the transmission RF power when the rod is retracted to further protect the user. In a second embodiment, a co-linear array of dipole antenna elements is used. The full array is active for reception. However, a proximity detector senses the proximity of a human body, and lowers the RF transmission power to those antenna elements in the array that are closest to the user's head.
    • 专为减少用户头部和身体的射频辐射而设计的个人通信设备的天线包括安装在伸缩杆的顶部上的单个半波偶极子天线元件,使得天线元件在使用者的头部 延长 杆完全不活动,仅用于将有源天线元件提升到用户头部上方并远离身体。 提供内置开关,当杆被缩回以降低传输RF功率以进一步保护用户时。 在第二实施例中,使用偶极天线元件的共线性阵列。 完整阵列有效接收。 然而,接近检测器感测人体的接近度,并且降低阵列中最接近用户头部的那些天线元件的RF发射功率。
    • 4. 发明授权
    • Trimmed foursquare antenna radiating element
    • 修剪四方天线辐射元件
    • US6057802A
    • 2000-05-02
    • US326688
    • 1999-06-07
    • J. Randall NealyJ. Matthew MonkevichWarren L. StutzmanWilliam A. Davis
    • J. Randall NealyJ. Matthew MonkevichWarren L. StutzmanWilliam A. Davis
    • H01Q9/04H01Q21/00H01Q21/24H01Q1/40H01Q1/42
    • H01Q9/0407H01Q21/24H01Q21/245H01Q9/045
    • A foursquare dual polarized moderately wide bandwidth antenna radiating element is provided which, due to its small size and low frequency response, is well suited to array applications. The foursquare element comprises a printed metalization on a low-loss substrate suspended over a ground plane reflector. Dual linear (i.e., horizontal and vertical), as well as circular and elliptical polarizations of any orientation may be produced with the inventive foursquare element. Further, an array of such elements can be modulated to produce a highly directive beam which can be scanned by adjusting the relative phase of the elements. Operation of the array is enhanced because the individual foursquare elements are small as compared to conventional array element having comparable frequency response. The small size allows for closer spacing of the individual elements which facilitates scanning. Additionally, a family of trimmed foursquare antennas is provided which offer improved performance and size considerations.
    • 提供了四平方双极化中宽带宽天线辐射元件,由于其小尺寸和低频响应,非常适合阵列应用。 四方形元件包括在悬挂在接地平面反射器上的低损耗衬底上的印刷金属化。 可以利用本发明的四方形元件来产生双线性(即,水平和垂直)以及任何方位的圆形和椭圆偏振。 此外,可以调制这种元件的阵列以产生可以通过调节元件的相对相位来扫描的高度指向的光束。 与具有可比较的频率响应的常规阵列元件相比,单个四方形元件较小,从而增强阵列的操作。 小尺寸允许各个元件的更紧密的间隔,这便于扫描。 另外,提供了一系列修剪的四方天线,其提供改进的性能和尺寸考虑。