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公开(公告)号：US06987392B1
公开(公告)日：2006-01-17
申请号：US10839835
申请日：2004-05-05
IPC分类号： G01R27/28
CPC分类号： G01R29/0835
摘要： A test architecture performs calibration and site verification testing of the effectiveness of a radiation shielding structure within which electronic equipment is housed. An external subsystem is outside a shielding cabinet, and an internal subsystem resides with the electronic equipment within the shielded equipment housing proper. The external subsystem includes a host computer, which controls the operation of transmit and receive subsystems. An external receiver is selectively coupled by the host processor to either an RF receive antenna or to a current sense probe. All control signals from the external subsystem are conveyed into the shielded cabinet by way of fiber optic links, in order to preserve the shielding effectiveness of the cabinet. Having the source of test signals and its associated transmission antenna located within the shielded cabinet serves to minimize the impact of such signals on circuits within the environment outside the cabinet.
摘要翻译： 测试架构对电子设备所在的辐射屏蔽结构的有效性进行校准和现场验证测试。 外部子系统位于屏蔽柜外部，内部子系统位于屏蔽设备外壳内的电子设备。 外部子系统包括主机，用于控制发送和接收子系统的操作。 外部接收器被主处理器选择性地耦合到RF接收天线或电流检测探针。 来自外部子系统的所有控制信号通过光纤链路传送到屏蔽柜中，以保持机柜的屏蔽效能。 将测试信号源及其相关的发射天线放置在屏蔽柜内，用于最小化这种信号对机柜外部环境中电路的影响。
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公开(公告)号：US07148459B2
公开(公告)日：2006-12-12
申请号：US10883319
申请日：2004-07-01
IPC分类号： H01J40/14
CPC分类号： H01S5/06832 , H01S5/042
摘要： In a first exemplary embodiment of the invention, an externally and photonically energized unit comprises a shaped resonant cavity, with selected material for converting the incident photons into other electromagnetic radiation for resonance within the cavity; and a pick-up element for receiving and applying the resonant electromagnetic radiation to one or more components external to the resonant cavity. In a wideband modulation mode, the resonant cavity contains a modulation element to which a first information signal is applied. When photons, such as from an x-ray burst, traverse the resonant cavity, a wideband RF signal is generated within the resonant cavity which is modulated by the information signal. In further embodiments, the resonant cavities provide local power based on the remotely sourced photonic wave, as well as enhanced detectors.
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公开(公告)号：US06587670B1
公开(公告)日：2003-07-01
申请号：US09342376
申请日：1999-06-29
IPC分类号： H04B110
CPC分类号： H04B15/04 , H03F1/0261 , H03F3/2171
摘要： Pulse width modulated (“Class D”) amplifiers and controllers switching in the 50 khz to 2 MHz range generate harmonics which interfere with AM radio reception. This has precluded wide spread acceptance of class D amplifiers in products with an AM radio. The amplifiers described here use a modified modulation technique when operating with an AM radio to avoid generating harmonics at the receiver selected frequency or its intermediate (IF) frequency. One embodiment uses a harmonic avoidance modulator. A second embodiment uses two or more oscillators and tests for the least distorted output signal. A third embodiment switches the mode of operation to a class AB amplifier when an AM signal is amplified.
摘要翻译： 脉冲宽度调制（“D类”）放大器和50 khz至2 MHz范围内的控制器可以产生干扰AM无线电接收的谐波。 这已经阻止了具有AM收音机的产品中D类放大器的广泛接受。 这里描述的放大器在使用AM无线电操作时使用修改的调制技术，以避免在接收机选择的频率或其中间（IF）频率处产生谐波。 一个实施例使用谐波回避调制器。 第二实施例使用两个或更多个振荡器和测试用于最小失真的输出信号。 当AM信号被放大时，第三实施例将操作模式切换到AB类放大器。
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4.发明授权Hybrid antenna including spiral antenna and periodic array, and associated methods 失效混合天线包括螺旋天线和周期阵列，以及相关方法公开(公告)号：US07750861B2
公开(公告)日：2010-07-06
申请号：US11748788
申请日：2007-05-15
IPC分类号： H01Q21/00
CPC分类号： H01Q9/27 , H01Q11/10 , H01Q15/006 , Y10T29/49016
摘要： The hybrid antenna includes a spiral antenna, e.g. a log spiral antenna, and a patch array layer adjacent to the spiral antenna and including a passive periodic patch array of conductive patch elements. A conductive ground plane may be adjacent to the patch array layer, and a dielectric layer may be between the conductive ground plane and the patch array. The spiral antenna may include an upper antenna arm, a lower antenna arm and a dielectric sheet therebetween. Each of the upper and lower antenna arms may be a printed planar conductive trace that is wider at a distal end thereof with respect to a center of the log spiral antenna. The patch or periodic array layer operates in conjunction with the ground plane to couple energy into the spiral antenna and thereby improve low frequency antenna efficiency while maintaining electrically small dimensions.
摘要翻译： 混合天线包括螺旋天线，例如。 对数螺旋天线和邻近螺旋天线的贴片阵列层，并且包括导电贴片元件的无源周期性贴片阵列。 导电接地平面可以与贴片阵列层相邻，并且电介质层可以在导电接地平面和贴片阵列之间。 螺旋天线可以包括上天线臂，下天线臂和它们之间的介电片。 上天线臂和下天线臂中的每一个可以是相对于对数螺旋天线的中心在其远端处更宽的印刷平面导电迹线。 贴片或周期性阵列层与地平面结合操作以将能量耦合到螺旋天线中，从而在保持电小尺寸的同时提高低频天线效率。
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公开(公告)号：US06768376B2
公开(公告)日：2004-07-27
申请号：US10430756
申请日：2003-05-06
IPC分类号： H03F338
CPC分类号： H04B15/04 , H03F1/0261 , H03F3/2171
摘要： Pulse width modulated (“Class D”) amplifiers and controllers switching in the 50 khz to 2 MHz range generate harmonics that interfere with AM radio reception. This interference has precluded wide spread acceptance of class D amplifiers in products that include an AM radio. The amplifier described here uses a a harmonic avoidance modulator when operating with an AM radio to avoid generating harmonics at the receiver selected frequency or the intermediate (IF) frequency thereof.
摘要翻译： 脉冲宽度调制（“D类”）放大器和50 khz至2 MHz范围内的控制器可以产生干扰AM无线电接收的谐波。 这种干扰阻碍了D类放大器在包括AM无线电的产品中的广泛接受。 这里描述的放大器在使用AM无线电操作时使用谐波避免调制器，以避免在接收机选择的频率或其中间（IF）频率处产生谐波。
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公开(公告)号：US5600273A
公开(公告)日：1997-02-04
申请号：US305366
申请日：1994-09-13
申请人： David W. Hall , J. G. Dooley , Arecio A. Hernandez
发明人： David W. Hall , J. G. Dooley , Arecio A. Hernandez
IPC分类号： H03K19/003 , H03K19/0944 , H03L7/099 , H03L7/16 , H03H11/26 , G06F1/04
CPC分类号： H03K19/00361 , H03K19/09441 , H03L7/0995 , H03L7/16
摘要： A partitioned constant delay logic network 208 has a number of constant delay logic elements. The delay of each logic element is held constant by applying a controlled bias voltage, V.sub.bias. The source of the controlled bias voltage is a phase locked loop 201 which has a voltage controlled oscillator 203 constructed out of an odd plurality of constant delay logic elements.
摘要翻译： 分区常数延迟逻辑网络208具有多个恒定的延迟逻辑元件。 通过施加受控偏压Vbias，每个逻辑元件的延迟保持不变。 受控偏置电压源是锁相环201，其具有由奇数个多个恒定延迟逻辑元件构成的压控振荡器203。
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公开(公告)号：US5514982A
公开(公告)日：1996-05-07
申请号：US292482
申请日：1994-08-18
申请人： David W. Hall , J. G. Dooley , Arecio A. Hernandez
发明人： David W. Hall , J. G. Dooley , Arecio A. Hernandez
IPC分类号： H03K19/003 , H03K19/0944 , H03L7/099 , H03L7/16 , H03K19/08
CPC分类号： H03L7/0995 , H03K19/00361 , H03K19/09441 , H03L7/16
摘要： A low noise logic (LNL) family is disclosed. An inverter 10 has a pair of load devices NL1, NL2 coupled to the drains of NMOS transistors N 1, N2. The input signal is coupled to the gate of N 1. The drain of N 1 is coupled to the gate of N2. A constant current source 12 is coupled between V.sub.ss and the sources of the transistors N1,N2. Trickle current devices NTR1, NTR2 are coupled to the drains of N 1, N2, respectively to insure input control of the output states. A high logic signal on the gate of N1 steers the constant current to the load NL1 and turns NL2 off. A low logic signal on the gate of N1 turns N1 off and applies a high voltage to the gate of N2, turning N2 on. N2 steers the constant current to NL2.
摘要翻译： 公开了一种低噪声逻辑（LNL）系列。 反相器10具有耦合到NMOS晶体管N1，N2的漏极的一对负载装置NL1，NL2。 输入信号耦合到N 1的栅极.N 1的漏极耦合到N2的栅极。 恒流源12耦合在Vss和晶体管N1，N2的源极之间。 涓流电流装置NTR1，NTR2分别耦合到N 1，N 2的漏极，以确保输出状态的输入控制。 N1的门上的高逻辑信号转向负载NL1的恒定电流并使NL2关断。 N1的栅极上的低逻辑信号将N1关断，并向N2的栅极施加高电压，打开N2。 N2将恒流转向NL2。
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