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| Number | Title | Issue Date |
| 7821273 | Circuit for detecting the impedance of a load The invention refers to a circuit and a method for detecting the impedance of a load, whereby the circuit and the method can be used by an impedance matching circuit. Impedance matching circuits need a complex algorithm to adjust the impedance accordingly. This algo... | 10/26/2010 |
| 7489141 | Surface micro sensor and method The present invention provides a micro sensor for monitoring the cleaning and drying processes of surfaces of dielectric films, micro features in porous dielectric films and biologic or other cells common in microelectronics fabrication, MEMS fabrication or microbio... | 02/10/2009 |
| 7332981 | Impedance matching apparatus for a plasma chamber comprising two separate storage units and three separate calculators An impedance matching apparatus 3 calculates a forward wave voltage Vfo and a reflected wave voltage Vro at an output terminal 3b, based on a forward wave voltage Vfi and a reflected wave voltage Vri at an input terminal 3a, on inf... | 02/19/2008 |
| 7315170 | Calibration apparatus and method using pulse for frequency, phase, and delay characteristic In a device for measuring the properties of a device under test connected by a signal transmission path having reciprocity, a terminal on the device under test side of the signal transmission path is opened; pulse signals are transmitted to a terminal on the measuri... | 01/01/2008 |
| 7309994 | Integrated directional bridge A directional bridge for measuring propagated signals to and from a source device to a load device where both the source device and load device are in signal communication with the directional bridge is disclosed. The directional bridge may include a first bridge ci... | 12/18/2007 |
| 7295154 | Vehicle obstacle warning radar A method for detecting an object using a transmitting antenna and an array of receiving antennas. The method comprises the step of transmitting a signal from the transmitting antenna. The magnitude and phase of a respective received signal at each of the receiving a... | 11/13/2007 |
| 7292742 | Waveguides for performing enzymatic reactions The present invention is directed to a method and an apparatus for analysis of an analyte. The method involves providing a zero-mode waveguide which includes a cladding surrounding a core where the cladding is configured to preclude propagation of electromagnetic en... | 11/06/2007 |
| 7271575 | Oscilloscope based return loss analyzer A system, apparatus and method for performing differential return loss measurements and other measurements as a function of frequency uses a digital storage oscilloscope (DSO) having spectral analysis functions. A waveform generator generates a differential test sig... | 09/18/2007 |
| 7268530 | Method to measure the mutual phase relationship of a set of spectral components generated by a signal generator A novel method is described that enables the measurement of the phase of the spectral components generated by an harmonic phase reference generator without using a calibrated sampling oscilloscope. First one uses a vector network analyzer to measure the output refle... | 09/11/2007 |
| 7230989 | System and method for processing digital visual interface communication data signals and display data channel communication signals over a transmission line A digital communication system for transmitting and receiving Digital Visual Interface (DVI) communication data signals and Display Data Channel (DDC) communication signals over a transmission line comprises an open-loop equalizer circuit and a DDC extension circuit... | 06/12/2007 |
| 7199678 | Impedance matching apparatus for a plasma chamber comprising two separate storage units and calculators An impedance matching apparatus 3 calculates a forward wave voltage Vfo and a reflected wave voltage Vro at an output terminal 3b, based on a forward wave voltage Vfi and a reflected wave voltage Vri at an input terminal 3a, on inf... | 04/03/2007 |
| 7196657 | Radar system using RF noise A radar system that utilizes predetermined, pseudorandom, or random waveforms that may be substantially matched to the impulse response of the radar and any surrounding clutter such that the signal-to-clutter ratio may be optimized and/or such that specific targets ... | 03/27/2007 |
| 7181122 | Zero-mode waveguides The present invention is directed to a method and an apparatus for analysis of an analyte. The method involves providing a zero-mode waveguide which includes a cladding surrounding a core where the cladding is configured to preclude propagation of electromagnetic en... | 02/20/2007 |
| 7129719 | Apparatus for detecting defect in circuit pattern and defect detecting system having the same Provided is an apparatus for detecting a defect of a circuit pattern which includes a resonator, a first power supply unit connected to one end of the resonator to apply power to the resonator, a probe connected to the other end of the resonator to contact one end o... | 10/31/2006 |
| 7126347 | Precision wideband 50 Ohm input and 50 Ohm output or 100 Ohm output differential reflection bridge A differential reflection bridge is provided for a 100 Ohm load, the bridge not being compromised by a translation to a 50 Ohm system. The reflection bridge uses two transmission line baluns. The first traditional balun T1 connects the input signal source to ... | 10/24/2006 |
| 7121719 | Radio-thermometer system and method for measuring electromagnetic energy radiated from an interior of a human body using the same A radio-thermometer system, and a method for measuring electromagnetic energy radiated from an interior of a human body, includes an antenna for receiving thermal energy radiated from a target object having a temperature to be measured, first and second noise source... | 10/17/2006 |
| 7119546 | Method for single ended line testing and single ended line testing device The present invention relates to a single ended line testing method for qualifying an electrically conducting line. This method includes the steps of sending a plurality of excitation signals from a first end of the line towards a second end of the line and before t... | 10/10/2006 |
| 7098672 | Flash vapor sampling for a trace chemical detector The presence of trace molecules in air is often determined using high sensitivity gas sensing instruments, such as an ion mobility spectrometer. Such devices are commonly utilized in the fields of explosives detection, identification of narcotics, and in application... | 08/29/2006 |
| 7076213 | Apparatus and method for testing voltage standing wave ratio in a W-CDMA mobile communication system An apparatus and method for testing a voltage standing wave ratio (VSWR) in a wideband code division multiple access (W-CDMA) mobile communication system. Upon detecting a VSWR test request, a controller determines an oscillation frequency information and a power le... | 07/11/2006 |
| 7071776 | Systems and methods for controlling output power in a communication device A mismatch detector including a directional device adapted to couple signals across the device and a detector coupled to a port on the directional device and configured to measure a reflected power a second detector coupled to a port on the directional device and co... | 07/04/2006 |
| 7061221 | Reduced complexity transmission line and waveguide fault tester A four-port junction is substituted for a six-port junction in a frequency domain reflectometer, which reduces the parts count and therefore cost and size of the reflectometer while improving reliability. The frequency domain reflectometer can alternatively be used ... | 06/13/2006 |
| 7053631 | VSWR-measurement with error compensation A method and base station apparatus are presented for calculating the Voltage Standing Wave Ratio of a radio frequency transmission line which is coupled with a first and a second directional coupler, the first directional coupler developing a first voltage indicati... | 05/30/2006 |
| 7013054 | Waveguides for performing spectroscopy with confined effective observation volumes The present invention is directed to a method and an apparatus for analysis of an analyte. The method involves providing a zero-mode waveguide which includes a cladding surrounding a core where the cladding is configured to preclude propagation of electromagnetic en... | 03/14/2006 |
| 7005862 | Method and apparatus for measuring electric characteristics of cable assembly, and computer product A propagation delay time of a cable assembly is measured by calculating a half of a time difference between a branch point of time-dependent variations of amplitude of reflection coefficient obtained by connecting a first connector with both terminals open-circuited... | 02/28/2006 |
| 6972648 | Broadband coaxial transmission line using uniformly distributed uniform mismatches A coaxial transmission line having intermediary segments of equal lengths and equidistant insulator supports is provided. The transmission line segment and insulator support spacing is designed to cause any reflection artifacts to occur outside or between desired ch... | 12/06/2005 |
| 6970000 | Measuring device, in particular vectorial network analyzer, with separate oscillators A measuring device (e.g., a vectorial network analyzer) by means of at least two ports can be connected to a device under test and has associated excitation/receiving units (ERUs), each thereof having one port. At least one ERU has a signal generator, which can appl... | 11/29/2005 |
| 6965837 | Method and arrangement for detecting load mismatch, and a radio device utilizing the same A method and an arrangement for detecting impedance mismatch between an output of a radio frequency amplifier (200, 901, 911, 921, 1101) which has an amplifying component (201, 301, Q46, 701, 801) and an input of a load (203, 302) coupled... | 11/15/2005 |
| 6917726 | Zero-mode clad waveguides for performing spectroscopy with confined effective observation volumes The present invention is directed to a method and an apparatus for analysis of an analyte. The method involves providing a zero-mode waveguide which includes a cladding surrounding a core where the cladding is configured to preclude propagation of electromagnetic en... | 07/12/2005 |
| 6903557 | Microwave moisture sensing via waveguide with slot array A generator (6) directs microwave signals to a waveguide (1) having a linear array of slots (2), and the signals are received by measuring device (5). The local permittivity or moisture content of material adjacent the waveguide (1... | 06/07/2005 |
| 6882161 | Method of measuring dielectric constant of PCB for RIMM Disclosed herein is a method of measuring a dielectric constant of a Printed Circuit Board (PCB) for a Rambus Inline Memory Module (RIMM), which includes the steps of measuring a length of a Rambus product of a PCB, applying an input waveform to the Rambus product a... | 04/19/2005 |
| 6867600 | Electronic circuit and method for testing a line The invention relates to an electronic circuit and method for testing a line (10). According to the invention the signal generator (20, 30) comprises a random bit series generating means for generating a spread spectrum test signal and the evaluating u... | 03/15/2005 |
| 6798216 | Resonant microwave sensor An apparatus for determining the properties of a material, that is to be examined, by applying a swept-frequency high frequency signal and measuring a reflection factor of the resonance signal. The apparatus has a microwave supply conductor for feeding the high freq... | 09/28/2004 |
| 6614240 | Microwave determination related to a material such as chloride found in a cement based composition Determinations are made related to the presence of a predetermined material in concrete under test using previously obtained model information. In one embodiment, the predetermined material includes a chloride material and the model information is obtaine... | 09/02/2003 |
| 6597185 | Apparatus for localized measurements of complex permittivity of a material An apparatus for localized measurements of complex permittivity of a material is provided. A probe (10) analyzes the complex permittivity of a sample (11), the probe (10) having a balanced two conductor transmission line (12) formed of conductive segments... | 07/22/2003 |
| 6580278 | Technique for the measurement of reflection coefficients in stored energy systems Methods and systems for measuring the reflection coefficient of a network are disclosed. The methods and systems measure the reflection coefficient by exciting a device under test with a driving signal. The driving signal incident on the device under test... | 06/17/2003 |
| 6472885 | Method and apparatus for measuring and characterizing the frequency dependent electrical properties of dielectric materials A method and apparatus for measuring complex permittivity of dielectric materials in solid, liquid, or gas form. The apparatus is includes a TEM or quasi-TEM transmission line test fixture, which contains the dielectric material under test, a set of uniqu... | 10/29/2002 |
| 6404299 | Devices, methods, and systems for network hub partial termination The present invention provides a system and device for a network hub that includes a single valued resistor placed in series with each transmission line such that reflected and other unwanted waves in the transmission line are rapidly dampened to prevent ... | 06/11/2002 |
| 6380748 | Apparatus and method for diagnosing antennas using switches An apparatus and method for diagnosing antennas using switches, wherein a system is configured in such a manner that a plurality of switches determine a data flow of a signal for test. Therefore, the antenna diagnosing apparatus can be so simplified in ci... | 04/30/2002 |
| 6366097 | Technique for the measurement of reflection coefficients in stored energy systems Methods and systems for measuring the reflection coefficient of a network are disclosed. The methods and systems measure the reflection coefficient by exciting a device under test with a driving signal. The driving signal incident on the device under test... | 04/02/2002 |
| 6348804 | Vector network analyzer In a vectorial network analyzer having at least two measuring ports, whose measuring arms respectively have quad gates with the accompanying measuring points, a separate high-frequency generator is associated to each measuring port; with high-frequency si... | 02/19/2002 |
