Abstract: An electronic communication device comprises a first transceiver capable of a bi-directional communication session on a first communication medium; a second transceiver capable of a bi-directional communication session on a second communication medium; and a control logic coupled to the first transceiver and the second transceiver and capable of implementing a convergence layer, wherein the control logic is configured to receive, from the first transceiver, a first signal; and cause, in response to the first signal, data received and transmitted by the first transceiver on the first communication medium as part of a communication session to be received and transmitted instead by the second transceiver on the second communication medium.

Abstract: A laser beam from a laser optical system is incident onto a semiconductor wafer. Thermal radiation light from the semiconductor wafer is incident onto an infrared detector. The infrared detector outputs a signal based on the intensity of the thermal radiation light. A processing device calculates a sheet resistance of the semiconductor wafer that is annealed by the laser beam on the basis of an output value of the infrared detector, and outputs a calculation value of the sheet resistance to an output device.

Abstract: A fast calibration method for slide-screw impedance tuners employs a reduced calibration algorithm, which creates appropriately distributed calibration points over the Smith chart compatible with already existing interpolation and tuning algorithms for high accuracy and high-speed impedance tuning. The method uses one vertical scaling of the tuning probe followed by a limited number of vertical positioning operations at pre-set horizontal intervals and applies this data to generate accurate interpolated high-density tuner calibration data points at a fraction of previously required calibration times.

Abstract: A waveguide low profile slide-screw impedance tuner for seamless on-wafer integration uses rotating metallic tuning probe. This ensures high resolution in the area where the probe penetration is maximum (high GAMMA), a smooth increase of depth (basic anti-electrical discharge—“Corona” form) and compensation for the negative phase trajectory at higher GAMMA, native to traditional vertically moving stub-probes in waveguide tuners. Also, using rotating disc-probes simplifies the tuner mechanics, eliminates the cumbersome precise vertical axis and gear and flattens the tuner profile for best direct connection with wafer-probes.

Abstract: A system described herein may provide a technique for the analysis of antennas in a wireless network, and the ensuing detection of misaligned antennas. Images reflecting measures of interference associated with different antennas may be analyzed based on structural similarity index (“SSIM”) or other similarity analysis techniques, and antennas may be paired according to this analysis. The paired antennas may be compared to a known configuration. Mismatches may indicate misalignment or other malfunctions, based on which automated remedial measures (e.g., antenna realignment) may be performed.

Abstract: An apparatus for measuring over-the-air (OTA) wireless communication performance in an automotive application of a device under test (DUT) arranged on or in a vehicle. The apparatus includes a chamber defining an internal volume therein, such as an EMC chamber or a semi-anechoic chamber. Further, a rotatable platform for supporting the vehicle is provided enclose in the internal volume, together with at least one chamber antenna. A communication system test instrument is further provided for measuring the transmission between the device under test and the chamber antenna. The chamber antenna is an array antenna, including a horizontal linear array of antenna elements, the chamber antenna preferably providing a plane wave in near-field where the vehicle is located. The array may further include a plurality of horizontal linear arrays, overlying each other in a vertical direction.

Abstract: A cooking apparatus including a transmission antenna for irradiating a substance to be cooked with beamformed electromagnetic waves; a reception antenna for receiving reflected waves reflected from the substance to be cooked; and a controller for determining the temperature of the substance to be cooked corresponding to the received reflected waves on the basis of the property in which the electromagnetic waves, with which the substance to be cooked is irradiated, are reflected differently in accordance with the temperature of the substance to be cooked.

Abstract: A microwave-based measuring device includes a number n of sensors, each sensor of the number n of sensors being embodied to generate associated sensor data such that, overall, a number n of items of sensor data are generated by way of the number n of sensors. A measurement variable calculation unit is embodied to calculate a number m of measurement variable values depending on the number n of items of sensor data on the basis of values of a number d of parameters. A learning unit is embodied to calculate the values of the number d of parameters on the basis of training data.

Abstract: An apparatus for producing an image of an object by electromagnetic radiation includes a transmitting device for producing the electromagnetic radiation, a plurality of transmitting antennas connected to the transmitting device for emitting the electromagnetic radiation, a plurality of receiving antennas, which receive the electromagnetic radiation emitted by the transmitting antennas, and a receiving device, connected to the plurality of receiving antennas, for receiving the electromagnetic radiation and a motor-driven rotating scanner. The transmitting antennas and the receiving antennas are arranged on the scanner. The scanner is set up in such a way that the transmitting antennas and the receiving antennas are rotatable at the same speed about an axis of rotation.

Abstract: A system for measuring moisture in soil below the ground surface comprises at least one passive microwave sensor device configured to measure natural thermal emissions from the soil and output a data signal and a processing circuit operably coupled to the at least one passive microwave sensor wherein the processing circuit is configured to receive the data signal and compile a soil moisture profile. The system further comprises a wide-band antenna wherein the at least one passive microwave sensor is located therein and an elongate horizontal mounting frame extending between first and second ends wherein the first end is securable to a mobile agricultural device and wherein the wide-band antenna is secured to the second end so as to position the wide-band antenna at a distance above the ground surface.

Abstract: A transmit/receive RF system for a magnetic resonance examination system is described.

Abstract: A system includes a sensor device having a sensor adapted to generate measurement data relating to a characteristic of a concrete mixture, a transmitter adapted to transmit a first signal based on the measurement data, and a conductive wire forming a coil having a plurality of loops around the sensor device and a wire antenna. The coil is adapted to generate an electric current in response to the first signal. The antenna is adapted to transmit a second signal based on the electric current. The system is embedded in a concrete mixture and a portion of the antenna is exposed above the surface of the concrete mixture. A current is induced in the coil due to electromagnetic induction. A second signal is transmitted via the wire antenna. The second signal is received and transmitted to a processor. The processor may analyze and/or store the signal.

Abstract: Aspects of the subject disclosure may include a system configured for receiving sensing data from a orientation detector coupled to an antenna, determining, according to the sensing data, that an aperture of the antenna has shifted from a first orientation to a second orientation, and configuring a transmitter to generate an adjusted electromagnetic wave that is supplied to a feed point of the antenna for offsetting the shift in orientation of the antenna. Other embodiments are disclosed.

Abstract: A fluid sensor has a core defining a fluid flow path and a cavity member located externally of the core. The cavity member includes an electrically-conductive composite material including a matrix and one or more reinforcing elements embedded within the matrix. The cavity member is configured so as to provide confinement for an electromagnetic field and the core is configured so as to permit transmission therethrough of electromagnetic radiation at a frequency of the electromagnetic field. The electromagnetic field may be a radiofrequency (RF) electromagnetic field. The fluid sensor can be used in the measurement of the composition and/or flow characteristics of fluid in the fluid flow path.

Abstract: Methods and apparatus for non-destructive inspection using microwave microscopy are disclosed. In one embodiment, a method for inspecting an electrically-conductive mesh in a composite component using microwave microscopy comprises generating radio-frequency electromagnetic radiation using a microwave microscopy probe disposed adjacent the composite component so that the radio-frequency electromagnetic radiation interacts with the electrically-conductive mesh in the composite component, and, detecting a characteristic associated with the microwave microscopy probe. The detected characteristic is indicative of a condition of the electrically-conductive mesh.

Abstract: A radar level gauge comprising a signal propagation device, a dielectric filling member arranged in the signal propagation device, and a sealing arrangement for preventing tank content from escaping into the outside environment. The dielectric filling member includes a main body formed of a polymer material, and at least one structurally reinforced element formed of a modified polymer material providing, the modified polymer material being obtained by modifying the polymer material with a filler material, wherein the at least one structurally reinforced element is integrally formed with the main body by sintering, and forms part of the sealing arrangement. The present invention is based on the realization that a structurally reinforced element, made of a modified polymer material, may be integrated into the main body by sintering.

Abstract: An electronic device such as an earbud may have control circuitry mounted in a housing. The housing may have portions such as an ear portion with a speaker port through which a speaker plays audio and a stalk portion that extends from the ear portion. Proximity sensors may be formed in the electronic device. For example, one or more proximity sensors may be formed on the ear portion to detect when a user has inserted an earbud into the ear of the user and/or one or more proximity sensors may be formed on a stalk portion to detect when a user is holding an earbud by the stalk or when a user is providing finger touch input such as taps, swipes, and/or other gestures on the stalk portion. The proximity sensors may be optical proximity sensors such as coherent self-mixing proximity sensors.

Abstract: An apparatus configured to provide for detection and ranging of a remote object, the apparatus configured to perform the following: based on a first reflected signal comprising a reflection from the remote object of a first frequency varying detection signal that varies in frequency over a first bandwidth; and based on a second reflected signal comprising a reflection from the remote object of a second frequency varying detection signal that varies in frequency over a different second bandwidth; determine a first estimated range based on a first beat frequency signal comprising the first reflected signal mixed with the first frequency varying detection signal; determine a second estimated range based on a second beat frequency signal comprising the second reflected signal mixed with the second frequency varying detection signal; determine a range of the remote object as a function of the first estimated range and the second estimated range.

Abstract: Embodiments of the present invention may provide an antenna characterization system. The system may include a horn antenna including a waveguide and a horn section with an open end and at least one lens disposed at the open end of the horn antenna, having a focal length. The system may also include a platform to hold an antenna under test (AUT) positioned at substantially distance x from the open end of the horn antenna, wherein x is the sum of the focal length and a far-field distance property of the AUT. The system may further include an analyzer coupled to the horn antenna to measure a radiation pattern and other properties such as EIRP, TRP, EVR and spurious emission of a passive or active AUT.

Abstract: A new measurement arrangement and method for measuring the performance of a device under test, such as an antenna, a mobile phone and other wireless terminals, are disclosed. The chamber defines an internal cavity therein, adapted to enclose the device under test, and including walls of an inwardly reflective material, rendering the walls reflective to electromagnetic waves, thereby simulating a multi-path environment. Thus, the chamber is a reverberation chamber. Further, at least one first chamber antenna and at least one second chamber antenna, are arranged in the cavity, the first and second chamber antennas being configured to transmit and receive electromagnetic waves within a first predefined frequency range and within a second predefined frequency range, respectively. A measuring instrument is connected to the device under test and the chamber antennas, for measuring the transmission between them.

Abstract: An active digital electronic tuner (AET) uses a digital PIN diode electronic tuner, an adjustable directional coupler, two circulators and a power amplifier to create a compact load pull tuner device able of generating octave frequency band virtual reflection factors |Gamma|?1 at milli-second tuning speed.

Abstract: A method includes processing an object in a cavity by applying radio frequency (RF) energy to the cavity. A first plurality of frequencies is identified, characterized in that a time derivative of a value indicative of a dielectric response of the cavity to RF energy at frequency of the first plurality of frequencies is larger than a first threshold. More energy is applied at frequencies of the first plurality of frequencies than at other frequencies.

Abstract: Several embodiments include a method of computing void fraction in a two-phase mixture in a pipe. A driver and a transmitter antenna can transmit a radio frequency (RF) signal through the pipe. The pipe can convey the two-phase mixture extracted from a geothermal well. The RF signal can pass through the two-phase mixture. A receiver antenna in the pipe can receive the RF signal. A receiver circuit can measure signal strength attenuations of the RF signal at the receiver antenna over a time window. A computation engine can compute an average of the signal strength attenuations over the time window. The computation engine or another computing device can then compute, in real-time, a change in a void fraction of the two-phase mixture based on the average of the signal strength attenuations.

Abstract: A method for nondestructive inspection of ceramic structures present as either a ceramic matrix composite structure or a ceramic based coating. Such non-metallic structures are used to provide thermal protection or weight reduction or both to aircraft and their components. The nonmetallic structure is scanned with an electromagnetic pulse in the range of 200 GHz to 4 THz. The electromagnetic pulse includes a plurality of frequencies within the Terahertz range and is not restricted to a single designated frequency. The frequency range is sensitive to changes in impedances and refractive index within the structure. After the electromagnetic pulse passes through the nonmetallic structure, it may be evaluated for changes in impedance in the nonmetallic structure at different locations, and, when present, whether the changes in impedance impact the ability of the structure to perform the function for which it was designed.

Abstract: A method and apparatus for testing radio-frequency antenna elements are disclosed.

Abstract: A system for analyzing a microwave-frequency signal by imaging is provided, comprising: a solid material at least one optical property of which is modifiable in at least one zone of the material, when the zone is simultaneously in the presence of an optical excitation or electrical excitation and a microwave-frequency signal having at least one frequency coinciding with a resonant frequency of the material, the material furthermore being such that a value of the resonant frequency varies as a function of the amplitude of a magnetic field, a magnetic field generator configured to generate a magnetic field having, in the interior of a portion of the zone, a spatial amplitude variation in a direction X, the material then having a resonant frequency that is dependent on a position in the direction X, and a detector configured to receive an image of the zone in said direction X.

Abstract: An electronic impedance tuner comprises an adjusting circuit, N cell tuning circuits identical in structure and a switch controller. The adjusting circuit comprises a first microstrip line, a second microstrip line, a first capacitor, a second capacitor, a third capacitor, a first inductor, a second inductor and a first PIN diode. Each cell tuning circuit comprises a third microstrip line, a fourth microstrip line, a fourth capacitor, a fifth capacitor, a second PIN diode and a third capacitor. The capacitance Cd of the fourth capacitor meets the condition: 4 ? ? Y s N ? ? ? ? ? f 2 ? ? ? req ? 1 - ? ? req ? 2 ? C d ? Y s ? ? ? f 1 ? ? ? req ? 1 - ? ? req ? 2 . The length d of the third microstrip line meets the condition: ? 1 / 4 ? ( N + 1 ) < d < c 4 ? ? reff ? [ ( C d · Z 0 ) 2 + ( 2 ? ? ? f Bragg ) 2 - C d · Z 0 ] .

Abstract: Terahertz (THz) or millimeter wave (mmW) band characterization of a differential-mode device under test (DUT) is performed using a non-contact probing setup based on an integrated circuit that includes the on-chip DUT and an on-chip test fixture as follows. A differential transmission line pair is operatively coupled with the DUT. A first differential antenna pair at a first end of the transmission line pair has a first antenna connected only with the first transmission line and a second antenna connected only with the second transmission line. A second differential antenna pair is likewise connected with a second end of the differential transmission line pair.

Abstract: An apparatus for measuring a composition of a fluid has a fluid conduit with a wall defining a fluid flow path, a transmitting antenna, a receiving antenna, and an electrically conductive waveguide member for electromagnetic coupling with the transmitting antenna and the receiving antenna and for guiding an electromagnetic field from the transmitting antenna to the receiving antenna along a waveguide path. The waveguide member is separated from the fluid flow path by an electrically insulating inner region of the wall. The waveguide member defines an opening disposed towards the fluid flow path to permit a portion of the electromagnetic field to extend through the opening and the inner region of the wall into the fluid flow path.

Abstract: A hybrid, fundamental and harmonic frequency, active injection load pull test setup includes a harmonic receiver, impedance tuners and operates using only a single power source at the fundamental frequency Fo whereby the signal is split between input and output signal path. The output signal portion is retrieved through the coupled port of an adjustable wave-probe, which is incorporated into the input tuner and attached on the vertical axis of one of the tuner's mobile carriages. Wideband and harmonic impedance tuners serve for pre-matching the DUT output and reducing the injection power requirement; the amplitude and phase control in the feedback loop uses the variable wave-probe coupler mounted inside the source tuner.

Abstract: The present disclosure relates to a method for determining a water cut value of a composition comprising a hydrocarbon. In some embodiments, the disclosure relates to an apparatus for determining the water cut value of the composition that comprises one or more of a capacitance probe, a temperature probe, a salinity probe, and a computer.

Abstract: Provided in some embodiments are systems and methods for measuring the water content (or water-cut) of a fluid mixture. Provided in some embodiments is a water-cut sensor system that includes a helical T-resonator, a helical ground conductor, and a separator provided at an exterior of a cylindrical pipe. The helical T-resonator including a feed line, and a helical open shunt stub conductively coupled to the feed line. The helical ground conductor including a helical ground plane opposite the helical open shunt stub and a ground ring conductively coupled to the helical ground plane. The feed line overlapping at least a portion of the ground ring, and the separator disposed between the feed line and the portion of the ground ring overlapped by the feed line to electrically isolate the helical T-resonator from the helical ground conductor.

Abstract: An apparatus for mapping and accuracy-testing an electromagnetic navigation system includes a sensor sensing electromagnetic vectors of an electromagnetic field, a carriage moving the sensor along a first direction and a second direction different from the first direction, a first position detector operatively associated with the sensor and detecting a first position of the sensor along the first direction, a second position detector operatively associated with the sensor and detecting a second position of the sensor along the second direction, and a controller operatively associated with the sensor and controlling movements of the carriage along the first and second directions and mapping the electromagnetic field based on the sensed electromagnetic vectors at predetermined positions in a coordinate system defined by the first direction, the second direction, and a third direction perpendicular to a plane defined by the first and second directions.

Abstract: The invention generally relates to detecting target molecules.

Abstract: In some embodiments, a positioning system is configured to position a plurality of antennas about a device under test (DUT). According to one embodiment, a positioning system includes a first positioner configured to hold a DUT and to provide motion of the DUT about a first axis, and a second positioner configured to hold a first antenna and to provide motion of the first antenna about a second axis.

Abstract: Disclosed is an ultra high frequency antenna device for use with an identification tag for attachment to an animal. The antenna device comprises: a meander line antenna; and a substrate. The antenna device is operable to use the body of the animal to which it is attached as part of the tuning circuit of said antenna device. Also disclosed is an ultra-high frequency identification tag comprising such an antenna device, and a method of manufacturing such an ultra-high frequency identification tag.

Abstract: A corrosion sensor system includes one or more corrosion sensors embedded in a coating material such as an anti-corrosion coating material. Each corrosion sensor may include a resonator disposed on a dielectric substrate, and has a resonant frequency in a radio frequency (RF) range or an infrared (IR) range, and is configured for interacting with an RF or IR excitation signal to produce an RF or IR measurement signal. The corrosion sensor system may be applied to an object for which corrosion is to be monitored. A corrosion detection system includes a data acquisition system that transmits the excitation signal to the corrosion sensor, and receives the measurement signal from the corrosion sensor for analysis to determine whether corrosion has occurred.

Abstract: An integrated hybrid (active-passive) harmonic impedance tuner uses a fixed and an adjustable directional coupler (wave-probe) and a number of independent wideband tuning probes, all mounted inside the same slabline and housing. The tuning probes are inserted between the fixed and the mobile wave-probes. The fixed wave-probe samples a portion of the forward travelling signal at the fundamental frequency, injects it into a power amplifier and the mobile wave-probe adjusts the phase and amplitude of the amplified signal and injects it back into the slabline towards the DUT. The mobile carriages and tuning probes are automated. The mobile wave-probe is either fully or partially (horizontal only) automated or fully manually controlled. Feedback signal phase and amplitude control is obtained through the horizontal and vertical movement of the mobile wave-probe.

Abstract: A radio device includes a transmitter and a receiver. The transmitter transmits rotationally polarized radio waves in a plurality of transmission propagation directions using a plurality of antennas. The receiver receives rotationally polarized radio waves in a plurality of reception propagation directions using a plurality of antennas. The receiver measures changes in rotational loci of polarizations of the radio waves received in the plurality of reception propagation directions corresponding to radio waves transmitted in a plurality of transmission propagation directions. The transmitter performs transmission using a reception propagation direction at which the changes measured by the receiver in the rotational loci of the polarizations of the received radio waves stop.

Abstract: A method to determine an electronic signature characteristic of a fluid medium comprises making a reception surface for receiving the fluid medium on at least one face of the substrate, putting the fluid medium into contact with the reception surface in order to make an interface between the substrate and the fluid medium, lighting at least one zone of the interface through the fluid medium with a pulsed light beam in order to create photogenerated electric charges, using a microwave reflectometer to measure the lifetime durations of the photogenerated electric charges, which durations have respective values that depend on the recombination rate at the interface between the substrate and the fluid medium, creating a matrix of measured lifetime duration values for the photogenerated electric charges, and using the matrix to determine the electronic signature characteristic of the fluid medium.

Abstract: A scattering tomography method includes: radiating waves to an object from a plurality of transmitting antenna elements aligned on a side surface of a case; receiving scattered waves by a plurality of receiving antenna elements aligned on the side surface of the case; and reconstructing an image relating to information on an interior of the object using scattered wave data representing the scattered waves. In the reconstructing, a reconstruction function for reconstructing the image relating to the information on the interior of the object is set in advance for a three-dimensional space having the same shape as the case, a scattering field equation which the reconstruction function satisfies is constructed, a visualization function that is obtained by solving the scattering field equation is derived from the scattered wave data, and the image relating to the information on the interior of the object is reconstructed using the visualization function.

Abstract: The present disclosure relates to a method for determining a water cut value of a composition comprising a hydrocarbon. In some embodiments, the disclosure relates to an apparatus for determining the water cut value of the composition that comprises one or more of a capacitance probe, a temperature probe, a salinity probe, and a computer.

Abstract: A method and apparatus for remotely detecting, locating, and identifying chemicals and chemical compounds through optically opaque materials. Electromagnetic radiation in the Terahertz range emitted from an antenna array is modulated to excite target molecules. The apparatus then stops the excitation energy and the molecules emit an electromagnetic signature detectable by the device at standoff distances.

Abstract: Provided is an apparatus for reconstructing an image using a microwave. The apparatus includes: a microwave measurement unit configured to obtain a microwave measurement value for a microwave measurement object; and an image reconstruction unit configured to perform an image reconstruction by using the microwave measurement value and shape boundary information of the object.

Abstract: A chip may be programmed to emit and/or augment energy tuned to interact with bodily functions through transdermal contact. The chip may be programmed by using a pair of Tesla pancake coils, each coupled to a spherical electrode and driven to create an energetic field between the electrodes. Embodiments may include systems that include the programmed chip in a fabric body. The systems may be wearable so that the effects of the programmed chip may be applied to selected areas of the human body. Some embodiments may be useful for augmenting healing of ailments.

Abstract: A fluid sensor (10) comprises a core (27) defining a fluid flow path (21) and a cavity member (30) located externally of the core. The cavity member (30) comprises an electrically-conductive composite material including a matrix and one or more reinforcing elements embedded within the matrix. The cavity member (30) is configured so as to provide confinement for an electromagnetic field and the core (27) is configured so as to permit transmission therethrough of electromagnetic radiation at a frequency of the electromagnetic field. The electromagnetic field may be a radiofrequency (RF) electromagnetic field. The fluid sensor (10) may be used in the measurement of the composition and/or flow characteristics of fluid in the fluid flow path (21).

Abstract: A probe (14) of a material level measuring apparatus (10) inserts into a container (20). The material level measuring apparatus (10) transmits an electromagnetic wave signal. When the electromagnetic wave signal touches a surface of a material (30), a first reflected signal is generated. When the electromagnetic wave signal touches a bottom of the probe (14), a second reflected signal is generated. According to the first reflected signal and the second reflected signal, a first time-passing difference value (t1) and a second time-passing difference value (t2) are obtained. According to the first time-passing difference value (t1), the second time-passing difference value (t2) and a predetermined empty container time-passing difference value (t3), a first material level and a second material level are obtained. According to the first material level and the second material level, a third material level is obtained.

Abstract: A system, method and hydrocarbon processing facility for determining at least one parameter of a multiphase fluid (1) comprising hydrocarbons flowing in a conduit (2) of a hydrocarbon processing facility, which system comprises: said conduit; at least one coaxial measurement probe (3), which comprises at least one probe conductor, a probe shield (7) arranged outside of the at least one probe conductor, which at least one measurement probe is mounted to the conduit for measuring signals indicative of at least one physical property of the fluid- and comprises a first, open-ended terminal (8) where the at least one probe conductor and the probe shield are exposed to the flowing fluid when the system is in operation; and a signal processor (4) for interpreting the signals to determine the at least one parameter.

Abstract: An electromagnetic tomography system for gathering measurement data pertaining to a human head includes an image chamber unit, a control system, and a housing. The image chamber unit includes an antenna assembly defining a horizontally-oriented imaging chamber and including an array of antennas arranged around the imaging chamber. The antennas include at least some transmitting antennas and some receiving antennas. The control system causes the transmitting antennas to transmit a low power electromagnetic field that is received by the receiving antennas after passing through a patient's head in the imaging chamber. A data tensor is produced that may be inversed to reconstruct a 3D distribution of dielectric properties within the head and to create an image. The housing at least partially contains the antenna assembly and has a front entry opening into the imaging chamber. The head is inserted horizontally through the front entry opening and into the imaging chamber.

Abstract: A method for determining a phase composition of a multiphase mixture flowing through a pipe is presented. The method includes exciting one or more patch antennas configured to operate over the range of frequencies. Further, the method includes acquiring at least one of a transmitted signal and a reflected signal over the range of frequencies from the one or more patch antennas. Moreover, the method includes estimating the phase composition of the multiphase mixture based on a group delay determined from at least one of the transmitted signal and the reflected signal. A system for determining a phase composition of a multiphase mixture flowing through a pipe is also presented.