Class / Patent application number | Description | Number of patent applications / Date published |
324627000 | Shielding effectiveness (SE) | 26 |
20080303533 | Cable testing device and testing method thereof - A cable testing device of the present invention can test sheltering performance of a cable which has a central wire, a shelter wrapped around the central wire and an exterior cover wrapped around the shelter. One end of the central wire and two ends of the shelter are earthed. The cable testing device includes a network testing device and a metal tube. The network testing device has an input which is connected to the other end of the cable and an output. The metal tube incloses the cable to be tested, one end of the metal tube is connected to the output of the network testing device, the other end is earthed. As a result, an electromagnetic field is formed in the interior of metal tube, thereby, the sheltering performance of the shelter of the cable can be tested directly before the whole cable product being assembled. | 12-11-2008 |
20090058426 | Electromagnetic shielding defect monitoring system and method for using the same - An embodiment disclosed herein is directed to a method of monitoring an electromagnetic shield effectiveness comprising transmitting a first electromagnetic field toward a first surface of an electromagnetic shield, detecting a second electromagnetic field transmitted from a second surface of the electromagnetic shield, generating a first signal corresponding to the second electromagnetic field and determining whether a defect exists at the electromagnetic shield by comparing the first signal to a predetermined threshold. | 03-05-2009 |
20090140750 | Interference Exclusion Capability Testing Apparatus - An interference exclusion capability testing apparatus is provided for use in testing interference exclusion capability of a specimen by radiating an electromagnetic wave toward the specimen from a radiating antenna. The radiating antenna includes an electromagnetic horn, and a waveguide plate that guides an electromagnetic wave radiated from the electromagnetic horn to the specimen. | 06-04-2009 |
20090243629 | METHOD AND APPARATUS FOR MINI MODULE EMI SHIELDING EVALUATION - A method for mini module EMI shielding effectiveness evaluation comprises providing a test vehicle including at least one test platform. The test platform includes at least one mini emitter, a mini receiver with a reference shield, and a mini receiver with a shield under test. EMI shielding effectiveness transmission signals are applied to the at least one mini emitter. Signals received by the mini receiver with a shield under test and the mini receiver with the reference shield are evaluated. The mini emitter, mini receiver with the reference shield, and mini receiver with the shield under test comprise components fabricated concurrently and under fabrication conditions used for fabrication of the test platform of the test vehicle. As used herein, a mini emitter and mini receiver may be interchanged according to the requirements of a given EMI shielding effectiveness evaluation. | 10-01-2009 |
20090267615 | System and Method for Sorting Detection of Signal Egress from a Wired Communication System - Issuance of work orders in response to monitoring signal egress from shielding integrity flaws in a cable communication system by detecting received signal strength from a mobile receiver only during rising trends in received signal strength when the mobile receiver is in motion and tracking the maximum received signal strength peak during each rising trend. Rising trends are detected by computing two rolling averages of received signal strength sample of different lengths and offset from each other and applying a threshold to the difference between the rolling averages to provide hysteresis in switching between rising and falling trend detection. Reported peaks are then compared by proximity to each other and their circle of influence determined in accordance with respective signal strengths to determine if newly reported peaks are duplicates of previously reported peaks and duplicate reported peaks are removed or discarded. | 10-29-2009 |
20090295405 | RESONANCE SCANNING SYSTEM AND METHOD FOR TESTING EQUIPMENT FOR ELECTROMAGNETIC RESONANCES - A resonance scanning system and method for testing equipment for electromagnetic resonances uses a resonance detection subsystem with at least one probe to identify at least one of a resonating location, a resonating frequency and a quality factor of a resonance of the equipment and an automatic scanning subsystem to displace the probe to different testing locations of the equipment so that the resonance detection subsystem can determine if any of the different testing locations of the equipment exhibits electromagnetic resonances. | 12-03-2009 |
20100007356 | ELECTROMAGNETIC SHIELDING DEFECT MONITORING SYSTEM AND METHOD FOR USING THE SAME - An embodiment disclosed herein is directed to a method of monitoring an electromagnetic shield effectiveness comprising transmitting a first electromagnetic field toward a first surface of an electromagnetic shield, detecting a second electromagnetic field transmitted from a second surface of the electromagnetic shield, generating a first signal corresponding to the second electromagnetic field and determining whether a defect exists at the electromagnetic shield by comparing the first signal to a predetermined threshold. | 01-14-2010 |
20100237879 | METHOD AND APPARATUS FOR IMPROVING YIELD RATIO OF TESTING - A method and apparatus for improving yield ratio of testing are disclosed. The method includes the following steps. First of all, devices are tested and electromagnetic interference is measured. Next, the test results are examined for whether the devices pass the test or not. Then, electromagnetic interference data are examined for whether the electromagnetic interference data are over a predetermined standard if the devices fail the test. The above-mentioned steps are performed again if the electromagnetic interference data are over a predetermined standard. The test is terminated if the devices still fail the test and the values of electromagnetic interference are still over a predetermined standard. | 09-23-2010 |
20110043222 | DUAL DEFORMABLE REVERBERATION CHAMBER - An arrangement for measuring the effectiveness of a shielding material against electromagnetic fields. | 02-24-2011 |
20110169503 | Chassis Shielding Effectiveness Evaluation System - A chassis shielding effectiveness evaluation system includes a chassis having a chassis ground. A board is located in the chassis and includes a board ground layer. A signal generator includes at least one ground member coupled to the chassis ground and a signal member coupled to the board ground layer. The signal generator is operable to send a signal through the signal member to the board ground layer. | 07-14-2011 |
20120146666 | METHOD AND APPARATUS FOR MEASURING AC SHIELD CONTINUITY FOR SHIELDED TWISTED PAIR STRUCTURED DATACOMM CABLE LINK - AC shield continuity for shielded twisted pair structured datacomm cable is determined by testing the cable, driven in a common mode, over a range of frequencies, to determine presence and location of shield breaks. DC ground path generated false results are thereby avoided. | 06-14-2012 |
20120326729 | Lower Power Localized Distributed Radio Frequency Transmitter - Methods and systems are disclosed for wireless communication, and in particular using a coaxial antenna for distributed wireless transmission. In one example, a wireless transmitter is disclosed that includes a radio frequency signal source and a coaxial cable including a near end and a far end. The near end is electrically connected to the radio frequency signal source and configured to receive signals from the radio frequency signal source. The coaxial cable has an inner conductor and an outer conductor. The wireless transmitter includes a shorting connection at the far end of the coaxial cable, the shorting connection electrically connecting the inner conductor and the outer conductor, and a plurality of openings along the coaxial cable spaced at predetermined locations to output signals generated by the radio frequency signal source. The invention can be used for RF attenuation monitoring and/or testing applications. | 12-27-2012 |
20130221988 | DEVICES AND METHODS FOR TESTING FLEX CABLE SHIELDING - Methods and devices for testing flex cable shielding of a consumer electronic device are provided. In one example, a method may include applying a signal across a first portion of the flex cable shielding and a second portion of the flex cable shielding. The method may also include detecting a parameter associated with the signal. The method may include determining a health of the flex cable shielding based at least partially on the detected parameter. | 08-29-2013 |
20150137829 | ELECTROMAGNETIC ANECHOIC CHAMBER - An electromagnetic anechoic chamber includes a chamber, a test bench located in the chamber for supporting an electronic device, a horizontal high frequency antenna, a perpendicular high frequency antenna, a horizontal low frequency antenna, a perpendicular low frequency antenna, four directional filters, four relays, a mixer, and a receiver. The horizontal high frequency antenna, the perpendicular high frequency antenna, the horizontal low frequency antenna, and the perpendicular low frequency antenna are located around the platform, and electrically coupled to the directional filters. Each relay includes a first end connected to the mixer and a second end connected to the corresponding directional filter. The mixer is electrically coupled to the receiver. The mixer generates a composite signal. The composite signal is transmitted to the receiver. The receiver analyzes and displays whether the electronic device is qualified or not. | 05-21-2015 |
20160057873 | EARTHING ARRANGEMENT FOR ELECTRICAL PANEL - A rigid electrical panel has both a flexible printed circuit and an electromagnetic protection layer embedded therein. The flexible printed circuit has an integral electromagnetic shield. The integral electromagnetic shield and the electromagnetic protection layer are electrically isolated, so as to provide independent grounding paths. The independent grounding paths can be individually tested for safe operation. | 02-25-2016 |
20160069942 | INTERNAL LINE REPLACEABLE UNIT HIGH INTENSITY RADIATED FIELD DETECTOR - Various embodiments for detecting a High Intensity Radiated Field (HIRF) in a Line Replaceable Unit (LRU) are provided. The internal detector may be used to test EMI filter pin connectors of a closed LRU. For example, a method comprises setting a selecting switch to a test connector position, thereby connecting a RF signal generator to a testing connection cable. The method further comprises causing the generator to generate a test signal as input into the testing connection cable, and determining if an internal HIRF detector has detected the signal. If the signal is detected, the method further comprises, for each EMI filter pin connector in the LRU, switching the selecting switch to a corresponding test cable coupled to an EMI filter pin connector, causing the generator to generate the test signal as input into the corresponding test cable; and determining if the detector has detected the signal. | 03-10-2016 |
324628000 | Circuit interference (e.g., crosstalk) measurement | 10 |
20090066343 | SYSTEM AND METHOD FOR COMPUTER NOTEBOOOK ELECTROMAGNETIC COMPATIBILITY ANALYSIS - A system and method for antenna analysis and electromagnetic compatibility testing in a wireless device utilizes a “parent” device that undergoes rigorous conventional testing. A “child” device having similar components may thereafter undergo abbreviated testing. Because the Total Isotropic Sensitivity of the parent device is known, testing may be performed on the child device to infer equivalence to the parent's TIS performance using the abbreviated test techniques. | 03-12-2009 |
20100109679 | METHOD FOR DETERMINING THE CURRENT RETURN PATH INTEGRITY IN AN ELECTRIC DEVICE CONNECTED OR CONNECTABLE TO A FURTHER DEVICE - A method for determining current return path integrity in an electric device with a plurality of signal lines and supply lines. A library with at least one reference signal pattern of a near end crosstalk signal on a defined signal line arising from an input signal on another defined signal line is provided, a predetermined signal to a selected signal line of the electric device is applied, the near end crosstalk signal on at least one further signal line of the electric device is detected, said near end crosstalk signal is compared with the corresponding reference signal pattern from the library, and if there is a deviation between the near end crosstalk signal and the corresponding reference signal pattern, an information that there is any defect in the electric device is displayed. | 05-06-2010 |
20110267073 | VALIDATING HIGH SPEED LINK PERFORMANCE MARGIN FOR SWITCH FABRIC WITH ANY-TO-ANY CONNECTION ACROSS A MIDPLANE - A system for testing link performance margin in a network device includes one or more daughter cards having a driver to transmit a signal and a receiver to receive the signal, and a midplane including a channel to transmit the signal from the driver to the receiver. The system includes multiple connector assemblies to connect the one or more daughter cards to the midplane, where each of the multiple connector assemblies includes a different known crosstalk margin value. A bit error rate tester is connected to a link between the driver and the receiver, and the multiple connector assemblies are interchangeably included in the link to approximate different signal-to-noise ratio margins for the tested link. | 11-03-2011 |
20110316561 | SYSTEMS, METHODS, APPARATUS AND COMPUTER READABLE MEDIUMS FOR USE ASSOCIATION WITH SYSTEMS HAVING INTERFERENCE - In some embodiments, a method includes characterizing a plurality of channels, each of the plurality of channels being a channel between a location and a respective one of the plurality of communication interfaces; for each of the plurality of communication interfaces, supplying signals to the communication interface and detecting interference that occurs at the location as a result of emissions radiated from the plurality of communication interface while the signals are supplied thereto; for each of the plurality of communication interfaces, determining an estimate of interference that would occur at the location as a result of emissions radiated from the communication interface while the signals are supplied thereto, based at least in part on the characterization of the channel between the location and the communication interface; and for each of the plurality of communication interfaces, comparing the estimate of interference that would occur at the location to the detected interference that occurs at the location. | 12-29-2011 |
20120293185 | DETERMINING THE CURRENT RETURN PATH INTEGRITY IN AN ELECTRIC DEVICE CONNECTED OR CONNECTABLE TO A FURTHER DEVICE - A method for determining current return path integrity in an electric device with a plurality of signal lines and supply lines. A library with at least one reference signal pattern of a near end crosstalk signal on a defined signal line arising from an input signal on another defined signal line is provided, a predetermined signal to a selected signal line of the electric device is applied, the near end crosstalk signal on at least one further signal line of the electric device is detected, said near end crosstalk signal is compared with the corresponding reference signal pattern from the library, and if there is a deviation between the near end crosstalk signal and the corresponding reference signal pattern, an information that there is any defect in the electric device is displayed. | 11-22-2012 |
20130033270 | ELECTROMAGNETIC INTERFERENCE TEST SYTEM WITH SELF-CHECKING FUNCTION AND SELF-CHECKING METHOD - An electromagnetic interference (EMI) test system with self-checking function for detecting electromagnetic interference includes a signal source, a line impedance stabilization network (LISN), a coupling decoupling network (CDN), an impedance stabilization network (ISN) and a receiver. The signal source provides an electronic signal, the LISN separates interference signal from the electronic signal. The CDN outputs a coupling signal, and the ISN separates interference signal from the signal from the CDN. The receiver figures out current signal strength of each frequency points of the signal from the ISN and compares the current signal strength with a reference value to determine whether the EMI test system works normally according to the comparison. | 02-07-2013 |
20130093434 | SIGNAL PROCESSING APPARATUSES AND METHODS FOR IDENTIFYING CABLE CONNECTIONS BETWEEN PORTS - Apparatuses and methods for analyzing at least one characteristic of a test signal coupled out from one of a plurality of cable lines by a coupling unit to determine whether that test signal has propagated directly to the coupling unit via a single cable line or has propagated indirectly to the coupling unit via one or more coupling paths between different cable lines. The determination of whether the test signal has propagated directly to the coupling unit via a single cable line or has propagated indirectly to the coupling unit via one or more coupling paths between different cable lines, may advantageously be used for operational or diagnostic purposes, e.g. to identify interconnections between ports in a network. | 04-18-2013 |
20140327451 | ADAPTIVE FREQUENCY-DOMAIN WINDOWING - A method, apparatus and software related product are presented for adaptive frequency-domain windowing to determine a time-domain crosstalk in a cable and produce effective TDX plots regardless of the frequency of a worst NEXT (near-end crosstalk). An adaptive window such as a low pass or pass band window may be selected based on the frequency of a measured worst NEXT margin for each pair combination | 11-06-2014 |
20150309100 | DETERMINING THE CURRENT RETURN PATH INTEGRITY IN AN ELECTRIC DEVICE CONNECTED OR CONNECTABLE TO A FURTHER DEVICE - A method for determining current return path integrity in an electric device with a plurality of signal lines and supply lines. A library with at least one reference signal pattern of a near end crosstalk signal on a defined signal line arising from an input signal on another defined signal line is provided, a predetermined signal to a selected signal line of the electric device is applied, the near end crosstalk signal on at least one further signal line of the electric device is detected, said near end crosstalk signal is compared with the corresponding reference signal pattern from the library, and if there is a deviation between the near end crosstalk signal and the corresponding reference signal pattern, an information that there is any defect in the electric device is displayed. | 10-29-2015 |
20160018451 | RF REFLECTOR - A radio frequency (RF) reflecting apparatus includes a curved reflecting element and resistive material coupled to the curved reflecting element proximate two or more edges of the curved reflecting element. The resistive material has a first portion with a first conductance and a second portion with a second conductance that differs from the first conductance. The RF reflecting apparatus also includes a frame coupled to the curved reflecting element and at least one wheel coupled to the frame. The at least one wheel is configured to enable to translation of the curved reflecting member. | 01-21-2016 |