AN RF COMMUNICATION METHOD AND APPARATUS
    1.
    发明申请
    AN RF COMMUNICATION METHOD AND APPARATUS 审中-公开
    一种RF通信方法和装置

    公开(公告)号:WO2012131337A1

    公开(公告)日:2012-10-04

    申请号:PCT/GB2012/050649

    申请日:2012-03-23

    CPC classification number: H04B1/30

    Abstract: In method of communicating with a deployed communication system, for example a transponder (40), a response signal is received from the transponder (40) in response to an interrogation signal that has been transmitted to the transponder (40) at a first carrier frequency (210). The response signal comprises (i) the interrogation signal shifted by the transponder to a second, different, carrier frequency (220), the second carrier frequency (220) being separated from the first carrier frequency by a shift frequency, (ii) a message signal from the transponder (40), carried on the shifted interrogation signal (220), and (iii) unwanted signals, at the first carrier frequency (210), resulting from reflections of the interrogation signal. A low-pass filter (110) has a cut-off frequency lower than the shift frequency. The response signal is mixed with a signal at a frequency separated from the second carrier frequency by no more than the cut-off frequency of the low-pass filter (110) minus half the bandwidth of the message signal to produce a downshifted signal comprising the shifted interrogation signal further shifted to a frequency lower than the cut-off frequency and the unwanted signals shifted to a frequency (210') higher than the cut-off frequency. The low-pass filter (110) is used to remove the unwanted signals from the downshifted signal and thereby to produce a filtered downshifted signal. The message signal is extracted from the filtered downshifted signal.

    Abstract translation: 在与部署的通信系统(例如应答器(40))通信的方法中,响应于已经以第一载波频率发送到应答器(40)的询问信号,从应答器(40)接收响应信号 (210)。 响应信号包括(i)由应答器移动到第二不同的载波频率(220)的询问信号,第二载波频率(220)与第一载波频率分离移位频率,(ii)消息 来自应答器(40)的信号,被传送到被转移的询问信号(220)上,以及(iii)由第一载波频率(210)产生的询问信号的反射所产生的不期望的信号。 低通滤波器(110)的截止频率低于移频。 响应信号与从第二载波频率分离的频率的信号与低通滤波器(110)的截止频率减去负信号信号的带宽的一半混合,以产生包括 偏移的询问信号进一步移动到低于截止频率的频率,并且不需要的信号移位到比截止频率高的频率(210')。 低通滤波器(110)用于从降档信号中去除不想要的信号,从而产生滤波的下变频信号。 从滤波的转换信号中提取信息信号。

    IMPROVEMENTS IN OR RELATING TO AN ELECTRON GUN AND AN ELECTRON BEAM WINDOW
    2.
    发明申请
    IMPROVEMENTS IN OR RELATING TO AN ELECTRON GUN AND AN ELECTRON BEAM WINDOW 审中-公开
    电子枪和电子束窗口的改进或与之相关的改进

    公开(公告)号:WO2005055269A2

    公开(公告)日:2005-06-16

    申请号:PCT/GB2004/005023

    申请日:2004-11-29

    CPC classification number: H01J3/026 H01J33/04

    Abstract: An electron beam window (20) is formed with six diamond panes (21) to transmit an electron beam (15). The panes (21) are formed in a cylindrical disc (17) of single crystal or of polycrystalline diamond such that each pane (21) is surrounded by a thicker integral peripheral rim (22) which conducts heat away from the panes (21). A heat sink ring (35) can be fitted to the outer cylindrical surface of the peripheral rim (22). A scanning means (36) indexes the electron beam (15) sequentially through each pane (21). The use of diamond panes reduces the electron beam energy converted to heat in each pane (21), the thicker peripheral rim (22) increases cooling of the panes (21), and the scanning movement (37) reduces the temperature rise of the panes (21).

    Abstract translation: 电子束窗口(20)由六个金刚石窗格(21)形成以传输电子束(15)。 窗玻璃(21)形成在单晶或多晶金刚石的圆柱形盘(17)中,使得每个窗格(21)被较厚的整体周边边缘(22)围绕,该周边边缘将热量从窗格(21)导离。 散热环(35)可以安装到周边边缘(22)的外圆柱表面。 扫描装置(36)依次通过每个窗格(21)索引电子束(15)。 金刚石窗格的使用减少了在每个窗格(21)中转换成热量的电子束能量,较厚的外围边缘(22)增加了窗格(21)的冷却,并且扫描运动(37)降低了窗格 (21)。

    A HIGH SPEED FREQUENCY DETECTOR
    3.
    发明申请
    A HIGH SPEED FREQUENCY DETECTOR 审中-公开
    高速频率检测器

    公开(公告)号:WO2009122194A1

    公开(公告)日:2009-10-08

    申请号:PCT/GB2009/050263

    申请日:2009-03-20

    CPC classification number: H04B1/1027 H04B1/7156

    Abstract: A sensor (10) for detecting an incident RF signal having a carrier frequency, and for estimating said carrier frequency, comprises a plurality of filters (70-73), each allowing passage of signals over a different band of frequencies from the band of frequencies over which passage of signals is allowed by the others of the plurality of filters (70-73), and a plurality of detectors (80-83). Each filter (70-73) is associated with at least one of the plurality of detectors (80-83), and said at least one detector (80-83) is arranged in use to generate an output signal if the incident RF signal results in a signal in the band of frequencies passed by the filter (70-73) with which the detector (80- 83) is associated. Generation of the output signal by the detector (80-83) indicates in which of the frequency bands the incident RF signal has been detected. Between arrival of the incident RF signal at the sensor (10) and generation of the output signal indicating in which of the frequency bands the incident RF signal has been detected, there is a delay of not more than 1 microsecond.

    Abstract translation: 用于检测具有载波频率并用于估计所述载波频率的入射RF信号的传感器(10)包括多个滤波器(70-73),每个滤波器允许在不同的频带上的信号从频带 多个滤波器(70-73)中的其它信号允许信号的通过,以及多个检测器(80-83)。 每个滤波器(70-73)与多个检测器(80-83)中的至少一个相关联,并且所述至少一个检测器(80-83)被布置成在使用中产生输出信号,如果入射的RF信号结果 在与检测器(80-83)相关联的滤波器(70-73)通过的频带中的信号中。 由检测器(80-83)产生输出信号指示在哪个频带中检测到入射的RF信号。 在传感器(10)处的入射RF信号的到达和指示在哪个频带中检测到入射的RF信号的输出信号之后,存在不大于1微秒的延迟。

    SCANNED ANTENNA SYSTEM
    5.
    发明申请
    SCANNED ANTENNA SYSTEM 审中-公开
    扫描天线系统

    公开(公告)号:WO2007096644A1

    公开(公告)日:2007-08-30

    申请号:PCT/GB2007/000648

    申请日:2007-02-23

    CPC classification number: H01Q15/0066 H01Q3/46 H01Q15/008

    Abstract: The invention comprises a feed horn (10) illuminating a circular flat panel (12) formed from a high impedance surface structure. By controlling the resonant frequencies of the individual elements of the array, a controlled phase shift profile is applied across the surface of the panel to an incident phase front spherically spreading from the feed antenna so as to reflect that wavefront in a particular direction or impose a certain desired beam shape. The principles are reciprocal so a receiving system can also be achieved or indeed a simultaneous transmit and receive operation can be supported. The phase controlled reflecting plate advantageously performs focussing to the feed and beam scanning or beam shaping. This concept of feed to a phased reflector plate allows the power distribution to be implemented in free space. In addition, the active component at each array element affecting the resonant frequency is a single varactor tuning diode per element with negligible power dissipation since it operates in reverse bias or a MeMs switch network. A further embodiment is described comprising a transmissive panel with phase shifting elements implemented in MeMs technology coupled to each element of the array. Calibration techniques are described that correct for non-systematic errors in the phase shifts on reflection which would corrupt the beam shape and pointing direction in a practical environment. These can be performed repeatedly, interleaved with the radar or communications waveforms passing through the antenna.

    Abstract translation: 本发明包括照射由高阻抗表面结构形成的圆形平板(12)的馈电喇叭(10)。 通过控制阵列的各个元件的谐振频率,将受控的相移曲线跨越面板的表面施加到从馈电天线球形扩展的入射相位前沿,以便在特定方向上反射该波前或施加 某些所需的波束形状。 这些原理是相互的,因此也可以实现接收系统,或者实际上可以支持同时发送和接收操作。 相控反射板有利地进行对进给和波束扫描或波束成形的聚焦。 馈送到相位反射板的这种概念允许在自由空间中实现功率分配。 此外,影响谐振频率的每个阵列元件的有源元件是单个变容二极管调谐二极管,每个元件具有可忽略的功耗,因为它工作在反向偏置或MeMs开关网络。 描述了另一实施例,其包括具有耦合到阵列的每个元件的以MeMs技术实现的相移元件的透射面板。 描述校正技术,其校正反射相移中的非系统误差,这将在实际环境中损坏光束形状和指向方向。 这些可以重复执行,与雷达交织或通过天线的通信波形。

    IMPROVEMENTS IN OR RELATING TO AN ELECTRON GUN AND AN ELECTRON BEAM WINDOW
    6.
    发明申请
    IMPROVEMENTS IN OR RELATING TO AN ELECTRON GUN AND AN ELECTRON BEAM WINDOW 审中-公开
    电子枪和电子束窗口的改进或相关

    公开(公告)号:WO2005055269A3

    公开(公告)日:2005-10-13

    申请号:PCT/GB2004005023

    申请日:2004-11-29

    CPC classification number: H01J3/026 H01J33/04

    Abstract: An electron beam window (20) is formed with six diamond panes (21) to transmit an electron beam (15). The panes (21) are formed in a cylindrical disc (17) of single crystal or of polycrystalline diamond such that each pane (21) is surrounded by a thicker integral peripheral rim (22) which conducts heat away from the panes (21). A heat sink ring (35) can be fitted to the outer cylindrical surface of the peripheral rim (22). A scanning means (36) indexes the electron beam (15) sequentially through each pane (21). The use of diamond panes reduces the electron beam energy converted to heat in each pane (21), the thicker peripheral rim (22) increases cooling of the panes (21), and the scanning movement (37) reduces the temperature rise of the panes (21).

    Abstract translation: 电子束窗(20)形成有六个金刚石窗(21)以透射电子束(15)。 窗玻璃(21)形成在单晶或多晶金刚石的圆柱形盘(17)中,使得每个玻璃板(21)被较厚的整体的外围边缘(22)包围,该外围边缘将热量从玻璃板(21)传导出去。 散热器环(35)可以装配到外围边缘(22)的外圆柱形表面上。 扫描装置(36)依次通过每个窗格(21)对电子束(15)进行索引。 金刚石玻璃的使用减少了在每个玻璃板(21)中转换成热量的电子束能量,较厚的外围边缘(22)增加了窗玻璃(21)的冷却,并且扫描运动(37)降低了玻璃板的温度上升 (21)。

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