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    Active high density multi-element directional antenna system
    81.
    发明授权
    Active high density multi-element directional antenna system 失效
    有源高密度多元定向天线系统

    公开(公告)号：US06661378B2

    公开(公告)日：2003-12-09

    申请号：US10004251

    申请日：2001-11-01

    Applicant: Graham P. Bloy

    Inventor： Graham P. Bloy

    IPC: G01S504

    CPC classification number: G01S3/04 ,  G01S3/06 ,  G01S3/12 ,  G01S3/66 ,  H01Q3/24 ,  H01Q3/2605 ,  H01Q11/10 ,  H01Q21/062

    Abstract: Active high density multi-element antenna system [DS] for radiolocation of RF target radiation has a processor-controlled antenna array [CAA] having rings [R1, R2, R3] concentric about a central axis to define arcuate sectors Sn about the central axis, each ring having adjacent p.c. boards [PC1, PC2, PC3] with PIN diode-switched antenna elements within sectors. The rings provide three rings [E1, E2, E3] of discrete dipolar elements, defining electrically isolated antenna units [ASm], each radial to the central axis, of quasi-log-periodic configuration. Antenna units are switched in rotational sequence about the central axis to provide narrow beam signal selectivity, directionally rotatable about the central axis. An array control system [ACS] is operated, as under microprocessor control [34], by a host system [HS] to cause RF scanning. PIN diode switching is used on printed circuit boards within the array. Amplitude and phase comparison modes are used.

    Abstract translation: 用于RF目标辐射的无源定位的有源高密度多元素天线系统[DS]具有具有围绕中心轴同心的环[R1，R2，R3]的处理器控制的天线阵列[CAA]，以围绕中心轴限定弓形扇形Sn ，每个环具有相邻的PC 具有PIN二极管开关天线元件的板[PC1，PC2，PC3]。 环提供离散偶极子元件的三个环[E1，E2，E3]，每个径向为中心轴的电隔离天线单元[ASm]具有准对数周期性配置。 天线单元围绕中心轴以旋转顺序切换以提供窄波束信号选择性，可绕中心轴定向旋转。 阵列控制系统[ACS]由微处理器控制[34]由主机系统[HS]进行操作，以进行RF扫描。 PIN二极管开关用于阵列内的印刷电路板。 使用幅度和相位比较模式。

    Methods and apparatus for determining a direction of arrival in a wireless commmunication system
    82.
    发明申请
    Methods and apparatus for determining a direction of arrival in a wireless commmunication system 失效
    用于确定到达无线通信系统的方向的方法和装置

    公开(公告)号：US20030137454A1

    公开(公告)日：2003-07-24

    申请号：US10056434

    申请日：2002-01-24

    Inventor： William Francis Alexander JR.

    IPC: G01S005/04

    CPC classification number: G01S3/74 ,  G01S3/023 ,  G01S3/04 ,  G01S3/10 ,  G01S3/48 ,  H04B7/086

    Abstract: Methods and apparatus are provided for determining a Direction of Arrival (DOA) of a remote unit (22) in a communication system (20). The apparatus includes a first antenna (32) and a second antenna (36) configured to receive an RF signal (32) having a plurality of scattered rays produced by multi-path scattering. A ray selector (114) of the apparatus is configured to identify a first ray and second ray from the scattered plurality of rays received at the first antenna (32) and the second antenna (36). A difference calculator (116) is configured to determine an amplitude difference (120) and a phase difference (122) between the first ray and said second ray, and an angle estimator (118) is configured to calculate a plurality of DOA values (142) based upon the phase difference (122) and select one of the plurality of DOA values (142) utilizing the amplitude difference (120).

    Abstract translation: 提供了用于确定通信系统（20）中的远程单元（22）的到达方向（DOA）的方法和装置。 该装置包括第一天线（32）和第二天线（36），其被配置为接收具有由多径散射产生的多个散射光的RF信号（32）。 设备的射线选择器（114）被配置为从在第一天线（32）和第二天线（36）处接收的散射的多个光线识别第一射线和第二射线。 差分计算器（116）被配置为确定第一射线和所述第二射线之间的振幅差（120）和相位差（122），并且角度估计器（118）被配置为计算多个DOA值（142 ），并且利用幅度差（120）选择多个DOA值（142）中的一个。

    Method and apparatus for radio location
    83.
    发明授权
    Method and apparatus for radio location 失效

    公开(公告)号：US5745078A

    公开(公告)日：1998-04-28

    申请号：US523920

    申请日：1995-09-06

    Applicant: Elie J. Baghdady

    Inventor： Elie J. Baghdady

    IPC: G01S3/04 ,  G01S3/08 ,  H01Q21/20

    CPC classification number: G01S3/043 ,  G01S3/04 ,  G01S3/08 ,  H01Q21/20

    Abstract: This disclosure relates to multi-element antenna clusters or arrays for the reception and transmission of radio waves for direction-finding, navigation aid and emitter and/or receiver location purposes. In particular, it relates to arrangements of multiple antennas whereby the direction of propagation (arrival or departure) of a wavefront is determined from a combination of the amplitudes of phasor (or total individual antenna output) differences between pairs of antennas, said arrangements being along certain geometrical patterns, such as a circle, an ellipse, a polygon, an open straight line, etc., with at least one longest dimension measuring more than one wavelength of the incident or departing wave. Although described in terms of electromagnetic waves and hence antennas as receiving sensors or radiators, this invention in reality applies to any other form of propagating waveborne energy, such as acoustic, ultrasonic, seismic, etc.

    Multiple-frequency autotrack feed for wideband communication systems
    84.
    发明授权
    Multiple-frequency autotrack feed for wideband communication systems 失效
    用于宽带通信系统的多频率自动跟踪馈送

    公开(公告)号：US5736907A

    公开(公告)日：1998-04-07

    申请号：US709442

    申请日：1996-08-29

    Applicant: C. Harry Chen ,  John P. Pacente ,  George H. Simkins

    Inventor： C. Harry Chen ,  John P. Pacente ,  George H. Simkins

    IPC: G01S3/04 ,  H01Q3/22 ,  H01Q13/22 ,  H01Q25/04 ,  H01P5/18

    CPC classification number: H01Q13/22 ,  G01S3/04 ,  H01Q25/04 ,  H01Q3/22

    Abstract: A travelling wave coupler autotracking system 10 controls the pointing of an antenna aboard an orbiting satellite by generating tracking signals covering a wideband frequency. The system 10 comprises a waveguide manifold 22 for exciting circular TE.sub.11 and TM.sub.01 modes covering a wideband frequency range, coupling arm waveguides 24, 26 for propagating signals having a phase velocity of TE.sub.10 mode that is the same as the phase velocity of TM.sub.01 mode, and couplers 30 for transforming microwave energy of the TM.sub.01 mode of the circularly polarized microwave signals into TE.sub.10 modes in the coupling waveguide. The system 10 can further comprise 180.degree.-hybrid 20 for combining the TE.sub.10 modes in the coupling waveguides in phase and for generating one or more error signals at different frequencies.

    Abstract translation: 行波耦合器自动跟踪系统10通过产生覆盖宽带频率的跟踪信号来控制轨道卫星上的天线的指向。 系统10包括用于激发覆盖宽带频率范围的圆形TE11和TM01模式的波导歧管22，用于传播具有与TM01模式的相位速度相同的TE10模式的相位速度的信号的臂波导24,26;以及 用于将圆偏振微波信号的TM01模式的微波能量转换成耦合波导中的TE10模式的耦合器30。 系统10可以进一步包括用于在相位耦合波导中组合TE10模式并用于在不同频率处产生一个或多个误差信号的180°混合20。

    Directionally sensitive receiving antenna employing gyrotropic material
    85.
    发明授权
    Directionally sensitive receiving antenna employing gyrotropic material 失效
    使用陀螺材料的定向敏感接收天线

    公开(公告)号：US4907010A

    公开(公告)日：1990-03-06

    申请号：US3470

    申请日：1987-01-15

    Applicant: Thomas M. B. Wright

    Inventor： Thomas M. B. Wright

    IPC: G01S3/04 ,  G01S3/14 ,  H01Q3/44 ,  H01Q19/08 ,  H01Q19/19 ,  H01Q25/02

    CPC classification number: G01S3/14 ,  G01S3/04 ,  H01Q19/08 ,  H01Q19/19 ,  H01Q25/02 ,  H01Q3/44

    Abstract: Antenna apparatus has two laterally spaced waveguide horns with apertures covered by layers of gyrotropic ferrite material. The layers are angled to present opposite angles of incidence to radiation from a common distant source. Electromagnets produce magnetic fields in and parallel with the ferrite layers. The relative phase or amplitude of energy received on the horns is compared to indicate the direction of the source.

    Abstract translation: 天线装置具有两个横向间隔开的波导喇叭，其孔被陀螺铁氧体材料层覆盖。 这些层成角度以呈现与来自公共远距离源的辐射相反的入射角。 电磁铁产生并与铁素体层平行的磁场。 将在喇叭上接收的能量的相对相位或振幅进行比较以指示源的方向。

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