利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

59 条记录 (耗时 0.027 秒)

    RF transceiver having a directly radiating transistor
    1.
    发明授权
    RF transceiver having a directly radiating transistor 失效
    RF收发器具有直接辐射晶体管

    公开(公告)号：US07224944B2

    公开(公告)日：2007-05-29

    申请号：US10763888

    申请日：2004-01-22

    申请人： Thomas E. McEwan

    发明人： Thomas E. McEwan

    IPC分类号： H04B1/40

    CPC分类号： H01Q9/16 ,  H01Q1/44 ,  H01Q23/00 ,  H04B1/71635

    摘要： Transistor package leads form quarter-wave antenna elements that directly radiate RF energy into free space without the need for a separate antenna. The transistor operates at a fundamental frequency and radiates a harmonic, thereby allowing radiation at frequencies normally considered “beyond cutoff” for a packaged transistor. This technique enables an additional 20 GHz of spectrum for use by surface mount technology. The transistor may be mounted on 1.6 mm thick glass-epoxy circuit board that also forms a quarter-wave reflector at 26 GHz. An optional dielectric lens produces a narrow beam and an optional planar filter rejects spurious fundamental emissions. A 26 GHz ultra-wideband (UWB) pulse-echo radar rangefinder implementation provides a low-cost upgrade to ultrasound.

    摘要翻译： 晶体管封装引线形成四分之一波长天线元件，可将射频能量直接辐射到自由空间中，而无需单独的天线。 晶体管工作在基频并辐射谐波，从而允许对于封装晶体管通常被认为是“超过截止”的频率的辐射。 这种技术可以通过表面贴装技术使用额外的20 GHz频谱。 晶体管可以安装在1.6mm厚的玻璃 - 环氧电路板上，该板也形成26GHz的四分之一波长的反射器。 可选的介质透镜产生窄光束，并且可选的平面滤光器抑制杂散的基本发射。 26 GHz超宽带（UWB）脉冲回波雷达测距仪实现为超声波提供低成本升级。

    Magneto-radar detector and method
    2.
    发明授权
    Magneto-radar detector and method 有权
    磁雷达探测器及方法

    公开(公告)号：US06914552B1

    公开(公告)日：2005-07-05

    申请号：US10606388

    申请日：2003-06-25

    申请人： Thomas E. McEwan

    发明人： Thomas E. McEwan

    IPC分类号： G01S13/02 ,  G01S13/04 ,  G01S13/56 ,  G01S13/86

    CPC分类号： G01S13/56 ,  G01S13/0209 ,  G01S13/04 ,  G01S13/86

    摘要： A varying magnetic field excites slight vibrations in an object and a radar sensor detects the vibrations at a harmonic of the excitation frequency. The synergy of the magnetic excitation and radar detection provides increased detection range compared to conventional magnetic metal detectors. The radar rejects background clutter by responding only to reflecting objects that are vibrating at a harmonic excitation field, thereby significantly improving detection reliability. As an exemplary arrangement, an ultra-wideband micropower impulse radar (MIR) is capable of being employed to provide superior materials penetration while providing range information. The magneto-radar may be applied to pre-screening magnetic resonance imaging (MRI) patients, landmine detection and finding hidden treasures.

    摘要翻译： 变化的磁场激发物体中的轻微振动，雷达传感器检测激励频率的谐波处的振动。 与常规磁性金属探测器相比，磁激发和雷达检测的协同作用提高了检测范围。 雷达只通过响应在谐波激励场振动的物体来抵消背景杂波，从而显着提高检测可靠性。 作为示例性布置，超宽带微功率脉冲雷达（MIR）能够用于提供优异的材料穿透，同时提供范围信息。 磁光雷达可以应用于预筛选磁共振成像（MRI）患者，地雷检测和发现隐藏的宝藏。

    Pulse center detector for radars and reflectometers
    3.
    发明授权
    Pulse center detector for radars and reflectometers 失效
    用于雷达和反射计的脉冲中心检测器

    公开(公告)号：US06531977B2

    公开(公告)日：2003-03-11

    申请号：US09922534

    申请日：2001-08-03

    申请人： Thomas E. McEwan

    发明人： Thomas E. McEwan

    IPC分类号： G01S1300

    CPC分类号： G01F23/284 ,  G01S7/2922 ,  G01S13/14

    摘要： The pulse center detector (PCD) produces an amplitude-independent center-triggered range output for precision radar rangefinders and TDR systems. Pulse center triggering is accomplished by triggering leading-edge and trailing-edge detectors and summing the outputs to produce a computed center-triggered result. Since the occurrence time of a pulse center does not vary with amplitude, the PCD is amplitude-independent. The PCD overcomes limitations of prior automatic pulse detectors, such as the inherent latency of a constant fraction discriminator (CFD) and the uncertainty of a time-of-peak (TOP) detector. The PCD can be implemented with a single analog component—a comparator—and thus requires appreciably fewer analog components than prior automatic detectors while providing lower jitter. Applications include radar and TDR tank gauges, and radar rangefinders for robotics and automotive applications.

    摘要翻译： 脉冲中心检测器（PCD）为精密雷达测距仪和TDR系统产生与振幅无关的中心触发范围输出。 脉冲中心触发是通过触发前沿和后沿检测器实现的，并对输出求和以产生计算的中心触发结果。 由于脉冲中心的发生时间不随振幅而变化，所以PCD与振幅无关。 PCD克服了现有自动脉冲检测器的局限性，例如恒定分数鉴别器（CFD）的固有潜伏期和峰值时间（TOP）检测器的不确定性。 PCD可以使用单个模拟组件（一个比较器）来实现，因此比以前的自动检测器要少得多的模拟组件，同时提供较低的抖动。 应用包括雷达和TDR油罐仪表，以及用于机器人和汽车应用的雷达测距仪。

    Charge transfer wideband sample-hold circuit
    4.
    发明授权
    Charge transfer wideband sample-hold circuit 失效
    电荷转移宽带采样保持电路

    公开(公告)号：US06060915A

    公开(公告)日：2000-05-09

    申请号：US80502

    申请日：1998-05-18

    申请人： Thomas E. McEwan

    发明人： Thomas E. McEwan

    IPC分类号： G01S7/285 ,  G11C27/02

    CPC分类号： G11C27/024

    摘要： A wideband sample-hold circuit is formed with a single diode in a minimum component configuration. A gate circuit comprised of a first capacitor and an impedance element forms a gate pulse, stores the sampled signal charge on the first capacitor, and transfers the charge to a second capacitor via the impedance element. The impedance element also defines the gate pulse width, in combination with the first capacitor. In a preferred mode, the first capacitor is responsive to individual gate pulses while the larger second capacitor integrates charge packets from the first capacitor due to multiple gate pulses to provide an integrated baseband output. In radar rangefinder applications, the baseband output is an equivalent time replica of the RF input. The sample-hold circuit has other applications in radar motion sensing and time domain reflectomitry.

    摘要翻译： 宽带采样保持电路以最小组件配置的单个二极管形成。 由第一电容器和阻抗元件构成的门电路形成栅极脉冲，将采样的信号电荷存储在第一电容器上，并经由阻抗元件将电荷传送到第二电容器。 阻抗元件还与第一电容器组合定义栅极脉冲宽度。 在优选模式中，第一电容器响应于各个门脉冲，而较大的第二电容器由于多个门脉冲而集成来自第一电容器的电荷分组以提供集成的基带输出。 在雷达测距仪应用中，基带输出是RF输入的等效时间复制品。 采样保持电路在雷达运动检测和时域反射测量中具有其他应用。

    Body monitoring and imaging apparatus and method
    5.
    发明授权
    Body monitoring and imaging apparatus and method 失效
    身体监测和成像设备及方法

    公开(公告)号：US5766208A

    公开(公告)日：1998-06-16

    申请号：US747131

    申请日：1996-11-12

    申请人： Thomas E. McEwan

    发明人： Thomas E. McEwan

    IPC分类号： A61B5/00 ,  A61B5/024 ,  A61B5/05 ,  A61B5/053 ,  A61B5/08 ,  A61B8/08 ,  A61B10/00 ,  G01S13/02 ,  G01S13/18 ,  G01S13/58 ,  A61B5/11

    CPC分类号： A61B5/0507 ,  A61B5/024 ,  A61B5/0535 ,  A61B5/0809 ,  A61B8/4416 ,  A61B8/488 ,  G01S13/0209 ,  G01S13/581 ,  G01S13/18

    摘要： A non-acoustic pulse-echo radar monitor is employed in the repetitive mode, whereby a large number of reflected pulses are averaged to produce a voltage that modulates an audio oscillator to produce a tone that corresponds to the heart motion. The antenna used in this monitor generally comprises two flat copper foils, thus permitting the antenna to be housed in a substantially flat housing. The monitor converts the detected voltage to an audible signal with both amplitude modulation and Doppler effect. It further uses a dual time constant to reduce the effect of gross sensor-to-surface movement. The monitor detects the movement of one or more internal body parts, such as the heart, lungs, arteries, and vocal chords, and includes a pulse generator for simultaneously inputting a sequence of pulses to a transmit path and a grating path. The pulses transmitted along the transmit path drive Oh impulse, generator and provide corresponding transmit pulses that are applied to a transmit antenna. The gating path includes a range delay generator which generates timed gating pulses. The timed gating pulses cause the receive path to selectively conduct pulses reflected from the body parts and received by a receive antenna. The monitor output potential can be separated into a cardiac output indicative of the physical movement of the heart, and a pulmonary output indicative of the physical movement of the lung. The impulse generator in the transmit path can be replaced with a pulsed RF generator.

    摘要翻译： 在重复模式中采用非声学脉冲回波雷达监视器，由此大量的反射脉冲被平均以产生调制音频振荡器以产生对应于心​​脏运动的音调的电压。 在该显示器中使用的天线通常包括两个平的铜箔，从而允许天线容纳在基本上平坦的壳体中。 监视器将检测到的电压转换为具有幅度调制和多普勒效应的可听信号。 它进一步使用双时间常数来减少总传感器对地面运动的影响。 监视器检测一个或多个内部身体部分（例如心脏，肺，动脉和声带）的运动，并且包括用于同时将脉冲序列输入到发射路径和光栅路径的脉冲发生器。 沿着发射路径发送的脉冲驱动Oh脉冲，发生器并提供施加到发射天线的相应发射脉冲。 门控路径包括一个产生定时门控脉冲的量程延迟发生器。 定时门控脉冲使得接收路径选择性地传导从身体部分反射并由接收天线接收的脉冲。 监视器输出电位可以分成指示心脏的物理运动的心输出量，以及指示肺的物理运动的肺输出。 发射路径中的脉冲发生器可以用脉冲RF发生器代替。

    High accuracy electronic material level sensor
    7.
    发明授权
    High accuracy electronic material level sensor 失效
    高精度电子液位传感器

    公开(公告)号：US5610611A

    公开(公告)日：1997-03-11

    申请号：US510980

    申请日：1995-08-03

    申请人： Thomas E. McEwan

    发明人： Thomas E. McEwan

    IPC分类号： E05F15/00 ,  G01F23/284 ,  G01S7/282 ,  G01S7/285 ,  G01S13/02 ,  G01S13/08 ,  G01S13/10 ,  G01S13/18 ,  G01S13/30 ,  G01S13/88 ,  G01S17/10 ,  G08B13/24 ,  G01S13/00 ,  G01F23/28

    CPC分类号： G08B13/2497 ,  E05F15/42 ,  E05F15/431 ,  G01F23/284 ,  G01S13/0209 ,  G01S13/88 ,  E05F15/00 ,  E05Y2400/452 ,  E05Y2400/61 ,  E05Y2400/822 ,  E05Y2900/55 ,  G01S7/282 ,  G01S7/285

    摘要： The High Accuracy Electronic Material Level Sensor (electronic dipstick) is a sensor based on time domain reflectometry (TDR) of very short electrical pulses. Pulses are propagated along a transmission line or guide wire that is partially immersed in the material being measured; a launcher plate is positioned at the beginning of the guide wire. Reflected pulses are produced at the material interface due to the change in dielectric constant. The time difference of the reflections at the launcher plate and at the material interface are used to determine the material level. Improved performance is obtained by the incorporation of: 1) a high accuracy time base that is referenced to a quartz crystal, 2) an ultrawideband directional sampler to allow operation without an interconnect cable between the electronics module and the guide wire, 3) constant fraction discriminators (CFDs) that allow accurate measurements regardless of material dielectric constants, and reduce or eliminate errors induced by triple-transit or "ghost" reflections on the interconnect cable. These improvements make the dipstick accurate to better than 0.1%.

    摘要翻译： 高精度电子材料液位传感器（电子量油尺）是基于非常短的电脉冲的时域反射计（TDR）的传感器。 脉冲沿着部分浸入待测材料的传输线或导丝传播; 发射板位于导丝的开始位置。 由于介电常数的变化，材料界面产生反射脉冲。 使用发射板和材料界面处的反射时间差来确定材料水平。 通过并入以下方面获得了改进的性能：1）参考石英晶体的高精度时基，2）超宽带方向采样器，允许在电子模块和导丝之间没有互连电缆的情况下运行，3）恒定分数 识别器（CFD），无论材料介电常数如何，均可进行精确测量，并减少或消除互连电缆上三重传输或“重影”反射引起的误差。 这些改进使量油尺准确到0.1％以上。

    Range-gated field disturbance sensor with range-sensitivity compensation
    8.
    发明授权
    Range-gated field disturbance sensor with range-sensitivity compensation 失效
    量程灵敏度补偿的门控场干扰传感器

    公开(公告)号：US5521600A

    公开(公告)日：1996-05-28

    申请号：US300769

    申请日：1994-09-06

    申请人： Thomas E. McEwan

    发明人： Thomas E. McEwan

    IPC分类号： G01V3/12 ,  G01S7/40 ,  G01S13/02 ,  G01S13/04 ,  G01S13/18 ,  G01S13/32 ,  G01S13/34 ,  G01S13/56 ,  G08B13/181 ,  G01S13/94

    CPC分类号： A61B5/0507 ,  G01S13/0209 ,  G01S13/18 ,  G01S13/348 ,  G01S13/56

    摘要： A field disturbance sensor operates with relatively low power, provides an adjustable operating range, is not hypersensitive at close range, allows co-location of multiple sensors, and is inexpensive to manufacture. The sensor includes a transmitter that transmits a sequence of transmitted bursts of electromagnetic energy. The transmitter frequency is modulated at an intermediate frequency. The sequence of bursts has a burst repetition rate, and each burst has a burst width and comprises a number of cycles at a transmitter frequency. The sensor includes a receiver which receives electromagnetic energy at the transmitter frequency, and includes a mixer which mixes a transmitted burst with reflections of the same transmitted burst to produce an intermediate frequency signal. Circuitry, responsive to the intermediate frequency signal indicates disturbances in the sensor field. Because the mixer mixes the transmitted burst with reflections of the transmitted burst, the burst width defines the sensor range. The burst repetition rate is randomly or pseudorandomly modulated so that bursts in the sequence of bursts have a phase which varies.

    摘要翻译： 场干扰传感器以相对较低的功率运行，提供可调整的工作范围，在近距离范围内不会过敏，允许多个传感器共同定位，制造成本低廉。 传感器包括发射电磁能量的发射脉冲序列的发射机。 发射机频率在中频调制。 突发序列具有突发重复率，并且每个突发具有突发宽度并且包括在发射机频率处的多个周期。 该传感器包括接收器，其在发射机频率处接收电磁能量，并且包括混合器，其将所发送的脉冲串与相同发射脉冲串的反射混合以产生中频信号。 响应于中频信号的电路表示传感器场中的干扰。 由于混频器将传输的脉冲串与传输脉冲串的反射混合，所以脉冲串宽度定义了传感器范围。 突发重复率是随机的或伪随机调制的，使得突发序列中的脉冲串具有变化的相位。