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公开(公告)号：US4089025A
公开(公告)日：1978-05-09
申请号：US730238
申请日：1976-10-06
申请人： Robert O. Banker , Charles T. Brown , Sanjar Ghaem-maghami , Howard E. Holshouser , Kenneth J. Wachter
发明人： Robert O. Banker , Charles T. Brown , Sanjar Ghaem-maghami , Howard E. Holshouser , Kenneth J. Wachter
摘要： A VIR signal detector circuit for a color television receiver identifies the repetitive reception of a VIR color information signal on a predetermined horizontal line of video signal. The detection is accomplished with minimum interference from Gaussian and pulse-type noise to assure that VIR color control circuits in the receiver are activated only upon receipt of an actual VIR signal. The VIR signal detector operates by generating a viewing pulse of short duration during each horizontal line in which a VIR signal may be present. An accumulator, set to respond to a predetermined number of simultaneous detections of the viewing pulse and a video signal exceeding a predetermined value, generates a control signal indicating that a VIR signal is being received.
摘要翻译： 用于彩色电视接收机的VIR信号检测器电路识别在预定水平视频信号线上的VIR彩色信息信号的重复接收。 以高斯和脉冲型噪声的最小干扰来实现检测，以确保接收器中的VIR颜色控制电路只有在接收到实际的VIR信号时被激活。 VIR信号检测器通过在可能存在VIR信号的每个水平线处产生短持续时间的观看脉冲来进行操作。 设置为响应于预定数量的同时检测观看脉冲和超过预定值的视频信号的累加器产生指示正在接收VIR信号的控制信号。
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公开(公告)号：US3958248A
公开(公告)日：1976-05-18
申请号：US545308
申请日：1975-01-30
摘要： A dipole antenna adjustable in span and distance to the reflector provides higher gain reception for a television receiver. By maintaining the ratio of span to distance constant optimum tuning is possible over a given band of frequencies. Tuning adjustment control is obtained from behind the reflector to eliminate interference with the radiation pattern of the antenna. BACKGROUND OF THE INVENTIONThe present invention relates to tunable communication antennas and more specifically to a directional antenna tunable over the UHF band of television frequencies.More and more in recent times VHF channels for television broadcasting in many areas of the country has become limited and the need has greatly increased for UHF channel utilization. Broadcasting in the UHF band, however, presents the problem of greater transmission path loss and higher gain antenna systems are required. Where high quality outside antennas are utilized in the reception of the broadcasted television signals, these conditions of increased channel utilization presents little or no problem. However, for television reception where indoor antennas are relied upon such as, for example, with portable receivers, the normal loop UHF antenna has been found to be inadequate. This is due in part to two factors. The first is that the loop antenna lacks directivity. The second factor is that this antenna is relatively broad band in its receiving characteristic thus being a compromise presenting less than optimum gain for the various channels in the UHF band.It is accordingly an object of the present invention to provide an improved UHF antenna for television receivers capable of portable and indoor use.Another object of the present invention is to provide a directional antenna that is tunable over a band of frequencies to provide higher gain communication.Another object of the present invention is to provide a dipole antenna with reflector that is tunable by simultaneous adjustment of dipole span and distance from the reflector.A further object is to provide a tunable dipole antenna tunable from behind the reflector to avoid interference with the radiation characteristics during tuning.BRIEF SUMMARY OF THE INVENTIONThese and other objects are realized by providing an antenna which includes a dipole or folded dipole adjustably supported parallel to the plane of the reflector. The span of the dipole is selected to be a half wave length at one of the frequencies in the band over which tuning is desired, e.g., the UHF band, and the distance of the dipole from the reflector is selected to be one quarter wave length. Dipole span and distance adjusting means are coupled to the dipole to change the span and distance of the dipole to the reflector simultaneously maintaining the ratio of span to distance constant throughout the band. The adjusting means may extend through the reflector to be actuated behind the reflector thereby avoiding interference with the radiation pattern during tuning.
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公开(公告)号：US06424300B1
公开(公告)日：2002-07-23
申请号：US09698600
申请日：2000-10-27
IPC分类号： H01Q124
CPC分类号： H01Q13/106 , H01Q1/243 , H01Q13/10
摘要： Small, low cost, notch antennas are provided that can be internally incorporated into the existing structure of wireless communicators, and that are functional in a variety of orientations of the wireless communicator. The notch antenna is preferably formed in the ground plane conductor of a printed circuit board (PCB) that has RF circuitry thereon for receiving and transmitting RF signals. The notch preferably has a configuration that results in electromagnetic waves having a substantially omnidirectional radiation pattern being radiated from the notch when RF signals are applied to the notch. Integrating the antenna function into the same printed circuit board (PCB) on which the transmitter and/or receiver functions are also located eliminates the need for an additional antenna component. However, if necessary, a notch antenna surface component is also provided.
摘要翻译： 提供了小型，低成本的陷波天线，其可以内部并入到现有的无线通信器结构中，并且在无线通信器的各种取向中起作用。 切口天线优选地形成在其上具有用于接收和发送RF信号的RF电路的印刷电路板（PCB）的接地平面导体中。 凹口优选地具有当将RF信号施加到凹口时导致具有基本上全向辐射图案的电磁波从凹口辐射的构造。 将天线功能集成到发射器和/或接收器所在功能的同一印刷电路板（PCB）中也不需要额外的天线部件。 然而，如果需要，还提供了切口天线表面部件。
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14.发明授权Antenna systems having capacitively coupled internal and retractable antennas and wireless communicators incorporating same 有权具有电容耦合的内部和可缩回天线的天线系统和结合其的无线通信器公开(公告)号：US06225951B1
公开(公告)日：2001-05-01
申请号：US09585514
申请日：2000-06-01
IPC分类号： H01Q138
摘要： Antenna systems for use within wireless communication devices such as radiotelephones are provided and include an internal multi-frequency band antenna and an elongated antenna member that is retractable. The elongated antenna member is extendible from the housing of a communications device so as to have an extended position and a retracted position. The elongated antenna member includes an elongated conductive element that is capacitively coupled with the multi-frequency band antenna when the elongated antenna member is in the extended position. The multi-frequency band antenna is electrically isolated from the elongated conductive element when the elongated antenna member is in the retracted position. When the elongated antenna member is in an extended position, the elongated conductive element is configured to resonate as a half-wave monopole antenna when the internal antenna resonates within a first frequency band. The elongated conductive element is configured to resonate as a full-wave monopole antenna when the internal antenna resonates within a second frequency band.
摘要翻译： 提供了在诸如无线电话机之类的无线通信设备中使用的天线系统，并且包括内部多频带天线和可伸缩的细长天线构件。 细长天线构件可从通信装置的壳体延伸，以便具有延伸位置和缩回位置。 细长天线构件包括细长导电元件，其在细长天线构件处于伸出位置时与多频带天线电容耦合。 当细长天线构件处于缩回位置时，多频带天线与细长导电元件电隔离。 当细长天线构件处于延伸位置时，当内部天线在第一频带内谐振时，细长导电元件被配置为谐振为半波单极天线。 当内部天线在第二频带内谐振时，细长导电元件被配置为谐振为全波单极天线。
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公开(公告)号：US5856808A
公开(公告)日：1999-01-05
申请号：US939395
申请日：1997-09-29
CPC分类号： H01Q1/244
摘要： Single feed point matching systems for radiotelephones include a retractable antenna and a stationary ferrule contact which are configured to define a coaxial capacitor therebetween when the antenna is in the extended position.
摘要翻译： 用于无线电话机的单馈点匹配系统包括可伸缩天线和固定套圈接触件，其被配置为当天线处于伸出位置时在其间限定同轴电容器。
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16.发明授权
公开(公告)号：US4485394A
公开(公告)日：1984-11-27
申请号：US423906
申请日：1982-09-27
摘要： A system for the automatic correction of convergence and gray scale in color television employs light sensors, either singly or in an array, on the beam landing face of a cathode ray tube or on the screen of a projection receiver. The sensors can be placed in the overscanned area of the raster, such that they are outside the normal viewing area, or in the viewing area if the sensors are made sufficiently small. In the vicinity of a sensor, two of the three cathode ray tubes or electron guns are blanked. As the light beam, in the case of a projection system, crosses the sensor, an output is produced. This output is processed to obtain accurate timing characteristics. Since the position of the sensor is known in terms of counts in both the vertical and horizontal directions, error signals can be developed by comparing the timing of the sensor output with the proper count. These error signals are used to develop vertical and horizontal correction signals to correct the convergence of the one cathode ray tube or gun. The process is then repeated for the remaining two cathode ray tubes or guns. The output of the sensor is also amplified by gated amplifiers for each of the cathode ray tubes or guns in sequential order, and the outputs of these amplifiers are compared to a preset value to develop error signals. These error signals are used to set gun drives to correct the gray scale.
摘要翻译： 用于彩色电视中的会聚和灰度的自动校正的系统使用单个或阵列上的光传感器，在阴极射线管的射束着地面上或在投影接收器的屏幕上。 传感器可以放置在光栅的过扫描区域中，使得它们在正常观看区域之外，或者如果传感器足够小，则在观察区域中。 在传感器附近，三个阴极射线管或电子枪中的两个被消隐。 作为光束，在投影系统的情况下，穿过传感器，产生输出。 处理此输出以获得准确的时序特征。 由于传感器的位置在垂直方向和水平方向上的计数方面是已知的，所以可以通过将传感器输出的定时与适当的计数进行比较来产生误差信号。 这些误差信号用于开发垂直和水平校正信号以校正一个阴极射线管或枪的会聚。 然后对剩余的两个阴极射线管或枪重复该过程。 传感器的输出也按照顺序按照每个阴极射线管或枪的门控放大器放大，并将这些放大器的输出与预设值进行比较，以产生误差信号。 这些误差信号用于设置喷枪驱动器以校正灰度。
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公开(公告)号：US4059838A
公开(公告)日：1977-11-22
申请号：US726182
申请日：1976-09-24
CPC分类号： H04N9/64
摘要： Viewer preference adjustment of saturation is realized in a VIR controlled color television receiver by provision of a closed loop control circuit exclusive of the RGB matrix. During the presence of the VIR signal a control signal is generated within the closed loop that controls the chrominance to luminance ratio of the chrominance and luminance signals applied to the RGB matrix and to the blue matrix contained within the closed loop. Adjustment of the level of either the luminance signal or the chrominance signal applied to the blue matrix affects the control signal which in turn adjusts said chrominance to luminance ratio to compensate and thereby brings about a shift in the levels of the red, green and blue signals outputted by the RGB matrix to change the saturation of the color picture.
摘要翻译： 通过提供不包括RGB矩阵的闭环控制电路，在VIR控制的彩色电视接收机中实现观看者偏好的饱和度调整。 在存在VIR信号期间，在闭环中产生控制信号，该控制信号控制施加到RGB矩阵和包含在闭环中的蓝色矩阵的色度和亮度信号的色度与亮度比。 调整施加到蓝色矩阵的亮度信号或色度信号的电平影响控制信号，该控制信号又调整所述色度与亮度比以进行补偿，从而导致红色，绿色和蓝色信号的电平偏移 由RGB矩阵输出以改变彩色图像的饱和度。
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