Shielding Effectiveness (se) Patents (Class 324/627)
  • Patent number: 10830811
    Abstract: An over-the-air test system for measuring the radiation performance as a function of temperature of a device under test is described, wherein the device under test has at least one antenna unit and at least one radio frequency circuit. The over-the-air test system comprises a measurement antenna unit, a measurement unit for at least one of signal generation and signal analysis, an enclosure that provides an internal space for accommodating the device under test for testing purposes in a sealed manner, and an atmosphere conditioning system that is configured to adapt the atmosphere within the internal space. The enclosure comprises at least one sealable opening via which the internal space is connectable with the atmosphere conditioning system to adapt the atmosphere within the internal space for the testing. Further, a method for measuring the over-the-air performance of a device under test is described.
    Type: Grant
    Filed: December 13, 2018
    Date of Patent: November 10, 2020
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventors: Corbett Rowell, Guido Apenburg, Stefan Ullrich
  • Patent number: 10816584
    Abstract: A method and system for processing finite frequency domain data to which a time gating process is to be applied to improve performance of signal processing equipment and to facilitate complex time gating while suppressing edge effects. According to one aspect, a method for improved processing of a finite frequency signal by signal processing equipment to suppress edge effects arising from a time gating process is provided. The method includes padding the finite frequency signal outside a frequency range with samples derived from an extrapolation process to produce an extended signal having samples inside and outside the frequency range of the finite signal. The method further includes applying a time gating process to the extended signal to exclude signals occurring outside a time interval and to produce a time gated signal with suppressed edge effects.
    Type: Grant
    Filed: December 4, 2017
    Date of Patent: October 27, 2020
    Assignee: ETS-Lindgren, Inc.
    Inventors: Zhong Chen, Zubiao Xiong
  • Patent number: 10651918
    Abstract: A system that incorporates teachings of the subject disclosure may include, for example, a system including an RF switch connected with an antenna system that includes a first antenna and a second antenna. The system can include, where the RF switch has a first position in which the first antenna operates as the primary antenna and the second antenna operates as the diversity antenna, and wherein the RF switch has a second position in which the second antenna operates as the primary antenna and the first antenna operates as the diversity antenna. The system can include a controller coupled with the matching network and with the RF switch, where the controller receives first measurements associated with the antenna system, and where the controller adjusts the RF switch to select between the first and second positions according to the first measurements.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: May 12, 2020
    Assignee: NXP USA, Inc.
    Inventor: Matthew Russell Greene
  • Patent number: 10540017
    Abstract: There is provided an information processing device including a capacitance variation detection unit configured to detect an operation input to each of a plurality of key regions as a capacitance variation amount of a capacitive element, the key region being provided on a sheet-like operation member, the capacitive element being provided in association with each of the key regions, the capacitance variation amount being dependent on a change in a distance between the key region and the capacitive element, and an input state determination unit configured to determine whether an input state of the key region is an ON state based on the detected capacitance variation amount, the ON state being a state in which the operation input to the key region is decided to be valid. The input state determination unit determines an end of the ON state based on a differential value of the capacitance variation amount.
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: January 21, 2020
    Assignee: Sony Corporation
    Inventors: Tetsuro Goto, Hiroto Kawaguchi, Takashi Itaya, Toshio Kano, Akira Ebisui
  • Patent number: 10429424
    Abstract: A distance H from a standard point O to one surface of a bottom plate of a terminal holding section 31 is set so that with respect to a direct wave that is output from one of a measurement antenna 25 and a wireless terminal that is a measurement target and is directly input to the other one thereof, a reflectivity of a reflection wave that is output from the one thereof, is reflected on one surface 32a of the bottom plate of the terminal holding section 31, and is input to the other one thereof is equal to or smaller than an incidence angle (for example, 80° or 70°) for assigning a predetermined allowable limit in view of a characteristic of incidence angle-to-reflectivity determined by a specific dielectric constant of the terminal holding section 31, to thereby reduce an influence of the reflection wave on measurement.
    Type: Grant
    Filed: January 18, 2019
    Date of Patent: October 1, 2019
    Assignee: ANRITSU CORPORATION
    Inventor: Tomonori Morita
  • Patent number: 10425361
    Abstract: Methods and apparatus for improving network performance include automatically setting the activation state of a termination resistor of a network device. A network communications error rate and, optionally, the identity of the network nodes associated with the errors, is determined. The error rate is compared to threshold criteria. If the error rate exceeds a predetermined threshold, the activation state of the termination resistor is toggled. If no improvement to the error rate is detected, the termination resistor is reverted to its original activation state.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: September 24, 2019
    Assignee: Trane International Inc.
    Inventor: William David Daugherty, III
  • Patent number: 10320237
    Abstract: An electromagnetic shielding layer and a wireless electrical energy transmission device having the electromagnetic shielding layer are provided. A first shielding layer is composed of a hollow area and a solid area. At the hollow area, because the magnetoresistance of the air is greater than the magnetoresistance of the magnetic sheet, it is not easy for the magnetic lines of flux of the high frequency magnetic field of the primary transmitting coil to pass the hollow area, so that the inductance value of the primary transmitting coil won't be affected easily by the change of the magnetoresistance during working Under the receiving coil is provided with magnetic sheet as much as possible to ensure the coupling of the receiving coil and the transmitting coil and to enhance the transmission efficiency.
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: June 11, 2019
    Assignee: Ningbo WeiE Electronic Technology Co., Ltd.
    Inventor: Hengyi Su
  • Patent number: 10126374
    Abstract: Methodologies and systems are described herein whereby the electrical performance of a device may be tested. In one or more embodiments, a system for testing the electrical performance comprises a monitoring device configured to perform a set of operations including concurrently monitoring at least three different test points of a device under test (DUT) and aggregating test data comprising signal information collected concurrently from at least three different test points of the DUT. In one or more embodiments, the system is configured to monitor at least three channels wherein at least one channel corresponds to a frequency range of less than 300 kHz and the phases of signals on at least three channels are different.
    Type: Grant
    Filed: July 20, 2016
    Date of Patent: November 13, 2018
    Assignee: Oracle International Corporation
    Inventor: Istvan Novak
  • Patent number: 10039023
    Abstract: The present disclosure provides a method and as apparatus for operating an intelligent device in a test mode. The method includes: scanning a Wi-Fi network periodically, determining whether a service set identifier (SSID) of the Wi-Fi network scanned includes a preset SSID, and operating the intelligent device in a test mode if the SSID of the Wi-Fi network scanned includes the preset SSID.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: July 31, 2018
    Assignee: Xiaomi Inc.
    Inventors: Enxing Hou, Yanlu Zhang, Guangyi Han
  • Patent number: 10009112
    Abstract: A method of reducing electromagnetic interference in a multi-channel transmitter is described. The method may include receiving multiple signals configured to be transmitted through multiple channels. The method may additionally include adjusting delays of the multiple signals to generate multiple delayed signals. Each two adjacent delayed signals may be configured to have a corresponding phase difference that satisfies a phase delay requirement. The method may additionally include generating multiple load signals from the multiple delayed signals.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: June 26, 2018
    Assignee: FINISAR CORPORATION
    Inventor: Yongshan Zhang
  • Patent number: 9964577
    Abstract: Provided is a system for testing a wireless terminal. The wireless terminal is configured as a device under test. The system includes: a test antenna; a reflecting surface, configured to totally reflect one or more first wireless signals emitted by the device under test; an absorbing screen, configured to absorb one or more second wireless signals emitted by the device under test, in which the one or more second wireless signals are emitted by the device under test toward a direction of the test antenna without reflection through the reflecting surface; a controller, coupled to the device under test and configured to control the device under test to emit the one or more first and second wireless signals; a power detection device, configured to detect a power of the one or more first wireless signals reflected by the reflecting surface and received by the test antenna.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: May 8, 2018
    Assignee: GENERAL TEST SYSTEMS INC.
    Inventors: Yihong Qi, Wei Yu
  • Patent number: 9954279
    Abstract: A test system for testing a device under test comprising an antenna array with multiple antennas and capable of controlling a radiation pattern of the antenna array, may comprise a test antenna system for emitting outgoing test signals to the device under test and receiving incoming test signals from the device under test, a control unit for controlling the device under test to set a first radiation pattern with a theoretical main lobe pointing to the test antenna system or to set a second radiation pattern with a main lobe comprising an angle larger than 0° with the main lobe of the first radiation pattern, and a test processing unit for evaluating the device under test based on signal levels of incoming test signals received by the test antenna system from the device under test and/or based on signal levels of outgoing test signals as received by the device under test.
    Type: Grant
    Filed: June 14, 2017
    Date of Patent: April 24, 2018
    Assignee: ROHDE & SCHWARZ GMBH & CO. KG
    Inventors: Alexander Pabst, Corbett Rowell
  • Patent number: 9909974
    Abstract: In one general aspect, an apparatus can include a probe including a plurality of exterior rotating members defining a guard ring, and an interior rotating member having a circular shape and disposed within at least a portion of a perimeter defined by the plurality of exterior rotating members. The apparatus can also include a waveform generator electrically coupled to the guard ring and the interior rotating member.
    Type: Grant
    Filed: April 28, 2015
    Date of Patent: March 6, 2018
    Assignee: Brigham Young University
    Inventors: Brian A. Mazzeo, W. Spencer Guthrie, Warren Kemmerer, Jared Baxter, Chloe Roedel
  • Patent number: 9762335
    Abstract: A method for accessing aircraft interference path loss in an aircraft. A plurality of radio frequency signals that are stepped through a plurality of frequencies in a frequency range is transmitted from a plurality of locations within an interior of the aircraft. Radio frequency signals present at a receive antenna are received in response to transmitting the plurality of radio frequency signals to form a plurality of measurements. An average of averages curve is generated from the plurality of measurements. A peak to average ratio is identified. Field uniformity is identified. A standard error for the average of averages curve is determined. An upper bound for the aircraft interference path loss in the aircraft is predicted using the average of averages curve, the peak to average ration, the field uniformity, and the standard error.
    Type: Grant
    Filed: June 23, 2013
    Date of Patent: September 12, 2017
    Assignee: THE BOEING COMPANY
    Inventors: Nathaniel Thomas Horton, Kenneth Patrick Kirchoff, Dennis Michael Lewis
  • Patent number: 9716529
    Abstract: A transceiver includes an equalizer, an adaptation module, an error detector, and a controller. The equalizer receives an input signal via the single twisted-pair Ethernet cable, including outputs of an analog front end of the receiver and an echo canceller, to cancel electromagnetic interference from the input signal. The adaptation module adapts parameters of one or more of i) the equalizer, ii) the analog front end, and iii) the echo canceller based on an error in an output of the equalizer due to the electromagnetic interference. The error detector detects when the error is greater than or equal to a predetermined threshold and in response sets an error indicator to indicate no error for a predetermined period of time. The controller controls adaptation of the parameters of the one or more of i) the equalizer, ii) the analog front end, and iii) the echo canceller based on the error indicator.
    Type: Grant
    Filed: May 25, 2016
    Date of Patent: July 25, 2017
    Assignee: Marvell Interntational LTD.
    Inventors: Shaoan Dai, Kok-Wui Cheong, Zhenzhong Gu, Junqing Sun, Xing Wu
  • Patent number: 9640447
    Abstract: A circuit is disclosed that includes a signal-forcing path, a discharging path, a contact probe, a monitoring probe and a switch module. The signal-forcing path is connected to a signal source. The discharging path is connected to a discharging voltage terminal. The contact probe contacts a pad module of an under-test device. The monitoring probe generates a monitored voltage associated with the pad module. The switch module is operated in a discharging mode to connect the contact probe to the discharging path when the monitored voltage does not reach a threshold voltage such that the under-test device is discharged and is operated in an operation mode to connect the contact probe to the signal-forcing path when the monitored voltage reaches the threshold voltage such that a signal generated by the signal source is forced to the under-test device.
    Type: Grant
    Filed: February 21, 2014
    Date of Patent: May 2, 2017
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Mill-Jer Wang, Ching-Nen Peng, Hung-Chih Lin, Hao Chen, Chung-Han Huang
  • Patent number: 9620342
    Abstract: Systems and methods are provided for interlacing ramped mass spectrometer parameter values during data acquisition. Ions from a sample are acquired within a cycle time, Ct, using a mass spectrometer. Within each Ct, two or more scans of the acquired ions are performed using two or more ramped values for a parameter of the mass spectrometer. When it is determined that scans for a desired range of ramped parameter values cannot be performed within Ct, the desired range of ramped values is divided into at least two interlaced groups of ramped values. The mass spectrometer is instructed to perform scans for each of the interlaced groups within two or more cycle times. Spectra from the scans for each of the at least two interlaced groups are combined. The ramped parameter values of the combined spectra have the desired range and the desired effective step size.
    Type: Grant
    Filed: November 21, 2013
    Date of Patent: April 11, 2017
    Assignee: DH Technologies Development Pte. Ltd.
    Inventor: David Michael Cox
  • Patent number: 9571211
    Abstract: A system, method, and enclosure for testing wireless devices. The enclosure includes a number of walls enclosing a testing space. The enclosure also includes a sliding cover secured between the two of the number of walls. The enclosure also includes one or more radio frequency layers disposed on the number of walls and the sliding cover.
    Type: Grant
    Filed: December 30, 2013
    Date of Patent: February 14, 2017
    Assignee: ATC Logistics & Electronics, Inc.
    Inventor: Jimmie Paul Partee
  • Patent number: 9541588
    Abstract: The embodiments herein are generally directed to using a current-mode CBC circuit to maintain a voltage bias setting at a receiver when performing capacitive sensing. To do so, the CBC circuit may compensate for the change in voltage at a receiver by providing a current at the input of the receiver. Instead of using a passive CBC capacitor for each receiver, the input device may use a single CBC capacitor and a plurality of current mirrors to source and sink the current required to correct the input voltage at a plurality of receivers. As a result, the current-mode CBC circuit includes only one passive capacitor (or bank of capacitors) and a plurality of current mirrors which may provide space and cost benefits relative to a CBC circuit that uses a passive capacitor (or bank of capacitors) for each receiver channel.
    Type: Grant
    Filed: October 30, 2013
    Date of Patent: January 10, 2017
    Assignee: SYNAPTICS INCORPORATED
    Inventors: Eric Scott Bohannon, Marshall J Bell, Jr., Kirk Hargreaves, Murat Ozbas, Jeffrey A. Small
  • Patent number: 9453865
    Abstract: A system and method for testing RF characteristics of a wireless device. The wireless device is positioned in an x-position and a y-position of a horizontal plane of a test fixture. An RF antenna coupler is positioned in an x-position and a y-position of a vertical plane. The positioning of the wireless device and the RF antenna coupler correspond to acceptable RF characteristics for testing the wireless device. Positions of the wireless device and the RF antenna coupler are identified. The identified positions are utilized to perform subsequent testing of similar wireless devices.
    Type: Grant
    Filed: November 1, 2013
    Date of Patent: September 27, 2016
    Assignee: ATC Logistics & Electronics, Inc.
    Inventors: Carlos Valmonte Jimenez, Jimmee Paul Partee, Fredrick Oluoch Onyango
  • Patent number: 9448956
    Abstract: According to some embodiments, a method and apparatus are provided to receive a first data burst associated with a first data line and a second data burst associated with a second data line, determine a first one or more stuff bits to be transmitted after the first data burst and a second one or more stuff bits to be transmitted after the second data burst, and output data comprising the first data burst and the first one or more stuff bits and the second data burst and the second one or more stuff bits.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: September 20, 2016
    Assignee: INTEL CORPORATION
    Inventors: William Dawson Kesling, Howard S. David, Michael Williams
  • Patent number: 9439086
    Abstract: Systems, processes, and structures allow enhanced near-field testing of the uplink and/or downlink performance of MIMO wireless devices (DUT), such as for any of product development, product verification, and/or production testing. Signal channels may preferably be emulated to test the performance of a device under test (DUT) over a range of simulated distances, within a near-field test environment. An enhanced process provides automated testing of a DUT over a wireless network, e.g. such as but not limited to a WLAN. The enhanced MIMO channel emulator may preferably be operated over a high dynamic range.
    Type: Grant
    Filed: August 10, 2015
    Date of Patent: September 6, 2016
    Assignee: NETGEAR, INC.
    Inventors: Joseph Amalan Arul Emmanuel, Jonathan M. Hummel, Charles W. Reed, Gin C. Wang
  • Patent number: 9377494
    Abstract: Disclosed are an apparatus and a method for analyzing a distribution of electromagnetic waves using a 4-port transverse electromagnetic (TEM) cell in a radio wave system. The apparatus for analyzing a distribution of electromagnetic waves in a radio wave system includes: an input unit configured to apply a reference electrostatic potential to an inside of a 4-port transverse electromagnetic (TEM) cell in which electronic devices are located; a calculation unit configured to calculate electrostatic potentials inside the 4-port TEM cell using a mode matching scheme; an analysis unit configured to analyze the distribution of electromagnetic waves inside the 4-port TEM cell through the electrostatic potentials inside the 4-port TEM cell; and an output unit configured to output the distribution of electromagnetic waves inside the 4-port TEM cell.
    Type: Grant
    Filed: December 26, 2012
    Date of Patent: June 28, 2016
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Sung Woong Choi, Hyo Joon Eom, Sang Bong Jeon, Seung Keun Park, Jun Cheol Park
  • Patent number: 9204580
    Abstract: A device having an upper plate comprising a top face and a bottom face with an opening. A lower plate comprising a top face and a bottom face substantially parallel to the upper plate, with an opening. A middle plate between and substantially parallel to the upper plate and lower plate, capable of moving with respect to the upper plate and lower plate, and having a top face a bottom face and at least one opening. A plurality of gaskets configured to electrically connect the upper plate, the middle, plate, and the lower plate and provide an interface that is designed to allow the middle plate to slide substantially parallel to the upper plate and the lower plate. At least one waveguide through the at least one opening of the middle plate.
    Type: Grant
    Filed: December 23, 2013
    Date of Patent: December 1, 2015
    Assignee: International Business Machines Corporation
    Inventors: Andrew J. Frana, Ross T. Fredericksen, Don A. Gilliland
  • Patent number: 9095045
    Abstract: Protective containers for electronic equipment, and methods of testing, use, and/or manufacture thereof, are provided. The cabinets provide a HEMP protection level to electronic equipment housed therein that meets a HEMP protection level according to MIL-STD-188-125-1.
    Type: Grant
    Filed: February 22, 2013
    Date of Patent: July 28, 2015
    Assignee: CenturyLink Intellectual Property LLC
    Inventors: Hector Rojo, Raymond Lee Kinley, Stephen Sattler
  • Patent number: 9093755
    Abstract: 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.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: July 28, 2015
    Assignee: Emprimus, LLC
    Inventors: Frederick R. Faxvog, David Blake Jackson, Greg Fuchs, Gale Nordling, Brian Groh, Wallace Jensen, James Nicholas Ruehl
  • Publication number: 20150137829
    Abstract: 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.
    Type: Application
    Filed: December 31, 2013
    Publication date: May 21, 2015
    Applicant: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventor: TEN-CHEN HO
  • Patent number: 9032352
    Abstract: A method of asymmetric asynchronous decoupling of capacitors in an integrated circuit design is provided for faster simulation by circuit simulators, e.g. FastSPICE circuit simulators. This method includes removing a coupling capacitor from a list, which includes coupling capacitors that capacitively couple two nets in the design. The two nets have capacitances C1 and C2, and at least one of capacitances C1 and C2 exceeds a threshold. The coupling capacitor has capacitance Cc. When coupling capacitance Cc is low and only one of capacitances C1 and C2 has a low capacitance, then a forward capacitance can be used at whichever of the two nets has the low capacitance and a lump capacitance can be used at the other net for simulation. When coupling capacitance Cc is low and both of capacitances C1 and C2 have high capacitances, then lump capacitances can be used at the two nets for the simulation.
    Type: Grant
    Filed: June 5, 2013
    Date of Patent: May 12, 2015
    Assignee: Synopsys, Inc.
    Inventors: Mayukh Bhattacharya, Michal Jerzy Rewienski, Amelia Huimin Shen
  • Patent number: 8836352
    Abstract: An integrated circuit comprises at least one pin and has at least one resistor connected between a reference voltage and the at least one pin. Current measurement circuitry applies a voltage across the at least one resistor and measures a current at the at least one pin responsive to the applied voltage in a first mode of operation. The measured current enables determination of a current limit set point for the integrated circuit. In a second mode of operation, the at least one resistor comprises a pull up resistor and the at least one pin that is connected to the at least one resistor comprises an open-drain output.
    Type: Grant
    Filed: June 11, 2009
    Date of Patent: September 16, 2014
    Assignee: Intersil Americas Inc.
    Inventors: William Brandes Shearon, Lawrence Gilbert Gough
  • Patent number: 8655284
    Abstract: Embodiments include systems and methods for over-the-air testing of wireless systems. Embodiments comprise separated chambers containing wireless devices. The chambers are connected by propagation path corridors.
    Type: Grant
    Filed: May 8, 2011
    Date of Patent: February 18, 2014
    Assignee: ETS-Lindgren, LP
    Inventor: Michael Foegelle
  • Patent number: 8625293
    Abstract: A lightweight radio/CD player for vehicular application is virtually “fastenerless” and includes a case and frontal interface formed of polymer based material that is molded to provide details to accept audio devices such as playback mechanisms (if desired) and radio receivers, as well as the circuit boards required for electrical control and display. The case and frontal interface are of composite structure, including an insert molded electrically conductive wire mesh screen that has been pre-formed to contour with the molding operation. The wire mesh provides EMC, RFI, BCI and ESD shielding and grounding of the circuit boards via exposed wire mesh pads and adjacent ground clips. The PCB architecture is bifurcated into a first board carrying common circuit components in a surface mount configuration suitable for high volume production, and a second board carrying application specific circuit components in a wave soldered stick mount configuration.
    Type: Grant
    Filed: August 12, 2011
    Date of Patent: January 7, 2014
    Assignee: Delphi Technologies, Inc.
    Inventors: Chris R. Snider, Vineet Gupta, Joseph K. Huntzinger, Michael G. Coady, Curtis Allen Stapert, Kevin Earl Meyer, Timothy D. Garner, Jeffrey T. Bell, Robert L. Vadas, Donald G. Moeschberger, Allen E. Oberlin, John Michael Matly, Kip R. Piel, Jerry J. Wendling
  • Patent number: 8610630
    Abstract: A 4-port strip line cell for generating standard near fields includes an upper conductor, a third port, a first port, a lower conductor, a second port and a fourth port. The third port supplies a power signal to the upper conductor. The first port terminates the upper conductor. The lower conductor is disposed to be spaced apart from the upper conductor. The second port is connected to the lower conductor so as to supply a power signal in the opposite direction of the third port. The fourth port terminates the lower conductor.
    Type: Grant
    Filed: November 15, 2011
    Date of Patent: December 17, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventor: Je Hoon Yun
  • Patent number: 8587332
    Abstract: An electronic protection module adapted for an electronic device to protection information read and stored in a signal reading element. The electronic protection module includes a circuit board, a first loop, a cover, a first flexible circuit board with a second loop, a second flexible circuit board with a third loop, electrical conductor(s) and conductive element(s). When one of the first loop, second loop and the third loop is disconnected, the signal reading element will be disconnected and lose the information, thereby preventing information leak from the electronic device. The electronic device may be a card reader capable of reading a barcode type, magnetic strip type or chip type of a financial card, credit card or personal identity card.
    Type: Grant
    Filed: February 1, 2011
    Date of Patent: November 19, 2013
    Assignee: Uniform Industrial Corp.
    Inventors: Yu-Tsung Chen, Yun-Han Chang, Jason Hsieh, Chien Hung Kuo
  • Patent number: 8570049
    Abstract: 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.
    Type: Grant
    Filed: December 9, 2010
    Date of Patent: October 29, 2013
    Assignee: Fluke Corporation
    Inventors: Jeffrey Sandsmark Bottman, Jun Ho Yi
  • Publication number: 20130221988
    Abstract: 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.
    Type: Application
    Filed: May 30, 2012
    Publication date: August 29, 2013
    Applicant: APPLE INC.
    Inventors: Martin P. Grunthaner, Jean-Marie Bussat, Benjamin B. Lyon, Steven P. Hotelling, Albert Lin
  • Patent number: 8513963
    Abstract: A radio frequency (RF) testing apparatus, for testing device under test (DUT) comprising a receiving antenna, includes a pair of transmitting antennas transmitting wireless communication signals to the receiving antenna, a shielding box, a first filter and a second filter. The shielding box includes a transmitting box, a receiving box for receiving the DUT, a connecting box connecting between the transmitting box and the receiving box and a pair of transmitting antennas fixed on the transmitting box and suspending towards the connecting box. The connecting box includes a microwave absorption medium on the connecting box and communicates with the receiving box. The first filter is mounted on the connecting box and the transmitting box to electrically connect with the transmitting antenna. The second filter is mounted on the receiving box to electrically connect with the DUT.
    Type: Grant
    Filed: July 22, 2011
    Date of Patent: August 20, 2013
    Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventors: He-Ping Chen, Jun-Jie Deng
  • Patent number: 8482294
    Abstract: A device (300) for the relative positioning of an electromagnetic probe network (100) and of an object being tested (200). The device includes at least a sliding element (301) to provide for the relative sliding of the object being tested (200) or of the electromagnetic probe network (100), to move the object being tested (200) or the probe network (100) along at least one sliding direction included in a plane of the probe network (100), and on which is provided a rotation device (320) for the relative rotation of the object being tested (200) and of the probe network (100) about a main rotation axis perpendicular to the sliding direction.
    Type: Grant
    Filed: June 23, 2009
    Date of Patent: July 9, 2013
    Assignee: Microwave Vision
    Inventors: Philippe Garreau, Per Iversen, Luc Duchesne, Arnaud Gandois
  • Patent number: 8452557
    Abstract: A system is provided which includes a signal generator for generating a periodic excitation signal and an analog to digital converter, wherein the system is configured to apply the periodic excitation signal to a network including a known first impedance and a second impedance and to take a first set of M digital samples of a first signal relating to the first impedance and a second set of M digital samples of a second signal relating to the second impedance with a sampling frequency that is an integer multiple of the frequency of the periodic signal. The system is further configured to determine the impedance value of the second impedance by calculating a relative phase difference between the first signal and the second signal using the first set of digital samples and the second set of digital samples.
    Type: Grant
    Filed: October 22, 2010
    Date of Patent: May 28, 2013
    Assignees: Texas Instruments Incorporated, Texas Instruments Deutschland
    Inventors: Lutz Naumann, Adrian Helwig, Wendyam Traore, Karl-Heinz Steinmetz, Andreas Fees
  • Patent number: 8401506
    Abstract: The invention provides a method and system for the wireless terminal radiation performance test based on a data mode, and wherein, the method comprises: building a human body model, in which the upper limb of the model holds the device under test at a predefined distance in front of the head of the model; taking the antenna of the device under test as the origin to build a spherical coordinate and selecting a testing point in the spherical coordinate; placing the model under the circumstance of a full-anechoic chamber, enabling the device under test to work in a data mode, and collecting the total radiated power at the testing point in the spherical placement system using the testing antenna, so as to obtain the total radiated power of the device under test. Through using the invention, the performance effect of human body coupling on the mobile terminal in a data mode could be reflected truly. It has higher authenticity and is easy to use.
    Type: Grant
    Filed: December 31, 2008
    Date of Patent: March 19, 2013
    Assignee: ZTE Corporation
    Inventor: Zhong Yu
  • Patent number: 8358992
    Abstract: A method and system for the wireless terminal receiving sensitivity performance test based on a data mode are provided. The method comprises: building a human body model, in which the upper limb of the model holds the device under test at a predefined distance in front of the head of the model; taking the antenna of the device under test as the origin to build a spherical coordinate and selecting a testing point in the spherical coordinate; placing the model under the circumstance of a full-anechoic chamber; enabling the device under test to work in a data mode, and collecting the receiving power at the testing point in the spherical placement system using the testing antenna, so as to obtain the total power receiving sensitivity of the device under test. In this way, the performance influence on the mobile terminal from the human body coupling of the human being in a data mode can be actually reflected, the reality is high and the usage is easy.
    Type: Grant
    Filed: December 31, 2008
    Date of Patent: January 22, 2013
    Assignee: ZTE Corporation
    Inventor: Zhong Yu
  • Publication number: 20120326729
    Abstract: 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.
    Type: Application
    Filed: December 20, 2011
    Publication date: December 27, 2012
    Inventors: Frederick R. Faxvog, David Blake Jackson, Greg Fuchs, Gale Nordling, Brian Groh, Wallace Jensen, James Nicholas Ruehl
  • Patent number: 8326229
    Abstract: Embodiments include systems and methods for over-the-air testing of wireless systems. Embodiments comprise separated anechoic chambers containing wireless devices. The anechoic chambers are connected by propagation path corridors.
    Type: Grant
    Filed: March 25, 2010
    Date of Patent: December 4, 2012
    Assignee: ETS Lindgren, L.P.
    Inventor: Michael Foegelle
  • Patent number: 8289717
    Abstract: Protective containers for electronic equipment, and methods of testing and manufacture thereof, are provided. The cabinets provide a HEMP protection level to electronic equipment housed therein that meets a HEMP protection level according to MIL-STD-188-125-1.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: October 16, 2012
    Assignee: Qwest Communications International Inc.
    Inventors: Michael J. Heimann, Jennifer Edison Zatz, Stephen Sattler, Andrew Bruno
  • Patent number: 8283932
    Abstract: A noise measurement system in a power stabilization network, a variable filter applied to the power stabilization network, and a method for measuring noise in the power stabilization network are provided. A power line communication signal from the power stabilization network is attenuated relative to a particular frequency using a filter in order to allow the power line communication signal to operate within an input range of an Electromagnetic Interference (EMI) measurer. A signal from a forbidden frequency band is transmitted to the EMI measurer without any attenuation or influence on a noise floor.
    Type: Grant
    Filed: December 9, 2009
    Date of Patent: October 9, 2012
    Assignee: LS Industrial Systems Co., Ltd.
    Inventor: Young Gyu Yu
  • Patent number: 8212572
    Abstract: Provided for in some embodiments is, a method of electromagnetic compatibility multi-carrier immunity testing. The method includes generating a first carrier frequency set including a first plurality of carrier frequencies simultaneously such that a device under test is subjected to the first plurality of carrier frequencies simultaneously. One or more of the first plurality of carrier frequencies is substantially different from other ones of the first plurality of carrier frequencies such that the first plurality of carrier frequencies do not interfere with one another when they are generated simultaneously, and intermodulation products of the first plurality of carrier frequencies are not significant relative to the first plurality of carrier frequencies when the first plurality of carrier frequencies are generated simultaneously.
    Type: Grant
    Filed: July 21, 2009
    Date of Patent: July 3, 2012
    Assignee: National Instruments Corporation
    Inventor: Patrick W. Webb
  • Publication number: 20120146666
    Abstract: 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.
    Type: Application
    Filed: December 9, 2010
    Publication date: June 14, 2012
    Applicant: FLUKE CORPORATION
    Inventors: Jeffrey Sandsmark Bottman, Jun Ho Yi
  • Patent number: 8198903
    Abstract: 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.
    Type: Grant
    Filed: January 14, 2010
    Date of Patent: June 12, 2012
    Assignee: Dell Products L.P.
    Inventors: Jeffrey C. Hailey, Jorge C. Marcet, Leroy Jones, Jr., Raymond A. McCormick, Todd W. Steigerwald, Tze-Chuen Toh
  • Patent number: 8193819
    Abstract: 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.
    Type: Grant
    Filed: October 30, 2009
    Date of Patent: June 5, 2012
    Assignee: King Yuan Electronics Co., Ltd.
    Inventors: Wei-Ping Wang, Hsuan-Chung Ko
  • Patent number: 8063649
    Abstract: A measuring system minimizes the parasitic affects of lumped circuit elements. The system includes two or more in-situ interfaces configured to conductively link a source to an internal load and an external load. The in-situ interfaces are linked to a shunt conductor. Two or more linear and dynamic elements conductively link the in-situ interfaces in series. The dynamic elements are configured to overwhelm the parasitic self-capacitance of an input circuit coupled to at least one of the in-situ interfaces. A shield enclosing at least one of the linear and dynamic elements has a conductive surface to fields and electromagnetic interference. The shield has attenuation ratios that substantially dampen the parasitic capacitance between the linear and dynamic elements that bridge some of the in-situ interfaces.
    Type: Grant
    Filed: April 3, 2009
    Date of Patent: November 22, 2011
    Assignee: UT-Battelle, LLC
    Inventors: Craig E. Deibele, George Brian Link, Vladimir V. Peplov
  • Patent number: 7999560
    Abstract: 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.
    Type: Grant
    Filed: October 26, 2006
    Date of Patent: August 16, 2011
    Assignee: Masprodenkoh Kabushikikaisha
    Inventors: Toshihiro Sugiura, Masamune Takeda, Junichi Takahashi