Abstract: An apparatus and method of controlling a temperature of a matching material used in an apparatus for generating a tomographic image is disclosed. The method includes measuring a temperature of a matching material in which an object is immersed in an apparatus for measuring a shape of an object, setting a set temperature at which an amplitude and a phase of an electromagnetic wave that passes through the matching material are maintained, based on the measured temperature of the matching material, and controlling the temperature of the matching material to be higher than the set temperature.

Abstract: Disclosed is an apparatus for breast cancer detection using a microwave, which decomposes a microwave signal measured on the circumference of a breast for each of a plurality of frequency components and detects a breast cancer based on the microwave signals decomposed for each of the plurality of frequency components to increase accuracy of diagnosis of the breast cancer.

Abstract: An apparatus and method of controlling a temperature of a matching material used in an apparatus for generating a tomographic image is disclosed. The method includes measuring a temperature of a matching material in which an object is immersed in an apparatus for measuring a shape of an object, setting a set temperature at which an amplitude and a phase of an electromagnetic wave that passes through the matching material are maintained, based on the measured temperature of the matching material, and controlling the temperature of the matching material to be higher than the set temperature.

Abstract: An apparatus and method for measuring a three-dimensional (3D) shape of an object using a liquid is provided, the method including generating an image by photographing an object immersed in a liquid, extracting a section contour indicating a boundary between the object and a surface of the liquid from the image, and measuring a 3D shape of the object using the extracted section contour.

Abstract: A phase measurement method in a microwave tomography system may include: transmitting a first Tx frequency signal, receiving a signal corresponding to the first Tx frequency signal, and measuring a first phase value; transmitting a second Tx frequency signal separated by a predetermined discrete frequency from the first Tx frequency signal, receiving a signal corresponding to the second Tx frequency signal, and measuring a second phase value; calculating a first phase difference based on a difference between the first and second phase values; calculating a second phase difference based on the discrete frequency; and determining an unwrapped phase value through comparison between the first and second phase differences.

Abstract: A method for reconstructing a dielectric image using electromagnetic waves, comprising: acquiring a measurement value of the electromagnetic waves; generating a matching system matrixes between the meshes; generating a smoothed dyadic Green's function matrix; generating an electromagnetic wave calculation value; calculating a misfit error between the acquired electromagnetic wave measurement value and the generated electromagnetic wave calculation value, and checking whether a change of the calculated misfit error satisfies a predetermined optimization determination condition; updating dielectric parameters at the meshes; and outputting a reconstructed dielectric image in the image reconstruction region.

Abstract: An apparatus for measuring a shape of an underwater object includes a laser emitter configured to irradiate a laser on a surface of a measurement target object under water; and a camera configured to capture a laser point generated at the surface of the measurement target object by the laser emitter. Further, the apparatus includes a shape restorer configured to convert a pixel coordinates value of the laser point captured by the camera into an absolute coordinates value to restore a three-dimensional (3D) shape of the measurement target object.

Abstract: Disclosed is an electro-magnetic tomography including: a modulator configured to modulate a generated transmit reference signal using a pseudo-noise signal; a transmitter configured to transmit the signal modulated by the modulator; a receiver configured to receive a signal transmitted from a transmitter; an amplitude detector configured to compare an amplitude magnitude between the signal received by the receiver and the transmit reference signal to measure a received amplitude; and a demodulator configured to demodulate the signal received by the receiver using the pseudo-noise signal to generate a cyclic signal, compare a phase between the transmit reference signal and the cyclic signal to measure the phase of the cyclic signal, and determine the phase of the received signal based on the phase of the measured cyclic signal.

Abstract: Disclosed is an image reconfiguration method for electro-magnetic tomography.

Abstract: Provided is a method of sensing a radio wave in diagnostic imaging of breast cancer, including arranging a plurality of transmitting and receiving antennas along a periphery of a breast, transmitting a radio wave signal from at least one first antenna among the plurality of transmitting and receiving antennas, receiving a scattered wave signal for the radio wave signal from the remaining antennas, other than the first antenna, among the plurality of transmitting and receiving antennas, and rotating the plurality of transmitting and receiving antennas by a predetermined angle.

Abstract: The present invention relates to a method for manufacturing a solid body having a superhydrophobic surface structure formed by using a surface treatment of a metal body, a replication process, and a polymer sticking phenomenon to increase efficiency of fluid transfer and prevent foreign materials from being accumulated in the tube, and a superhydrophobic fluid transfer tube using the method. The superhydrophobic fluid transfer tube includes a fluid guider and a solid body provided on a fluid contact surface of the fluid guider and has micrometer-scaled unevenness and nanometer-scaled protrusions.

Abstract: An RF MEMS switch using a fine liquid metal droplet is provided. The RF MEMS switch using a fine liquid metal droplet includes: a first layer member having a signal transmission line; a second layer member disposed on the first layer member, and having a chamber formed corresponding to the signal transmission line so as to induce a change in the shape of the fine liquid metal droplet and a through hole formed at one side of the chamber so as to bring the fine liquid metal droplet, whose shape is to be changed in the chamber, into contact or non-contact with the signal transmission line; an operating member disposed on the second layer member, and provided at an open side of the chamber so as to provide deformability to the fine liquid metal droplet through the open side of the chamber; and a third layer member for defining the position of the operating member, and coupled to the first layer member and the second layer member.

Abstract: The present invention relates to a microwave imaging breast phantom including a simulated breast tissue phantom and a simulated cancer tissue phantom, wherein the simulated cancer tissue phantom is included in the simulated breast tissue phantom, the simulated breast tissue and the simulated cancer tissue are separated from each other, the simulated breast tissue and the simulated cancer tissue are formed by using a solvent solely or mixing water and a solvent, and the solvent having a range in which assuming that specific gravity of the water is a and specific gravity of the solvent is b, ‘(b?a)/a×100’ is about ?10 to about +10 (wherein 0 is excluded) is mixed with the water, a method of testing reliability of a breast cancer diagnostic apparatus using the microwave imaging breast phantom, and a breast cancer diagnostic apparatus including the microwave imaging breast phantom.

Abstract: An image reconstruction apparatus includes: a transmission signal generation unit configured to generate a transmission signal in an image reconstruction region, in order to acquire an image reconstruction value; an electromagnetic wave measurement unit configured to measure electromagnetic waves by receiving the transmission signal; an image reconstruction unit configured to update a parameter by using a matrix of matched system of a Sinc-Gauss-shaped basis function which is allocated to each node of a reconstruction mesh in the image reconstruction region, and generate an image reconstruction value; and an optimization determination unit configured to determine whether the parameter of the image reconstruction unit is optimized or not, and output the image reconstruction value or cause the image reconstruction unit to repetitively perform the calculation, wherein the reconstruction mesh has a grid structure of which the size is larger than that of a forward mesh and equal to the image spatial resolution.

Abstract: Provided is a mobile tri-band antenna system having low profile. The antenna system includes a tri-band feeding unit for dividing a satellite broadcasting signal by a signal channel in an azimuth angle and an elevation angle, and transmitting/receiving the satellite communication signal through distinguishing the satellite communication signal; a beam shaping unit for dividing the satellite broadcasting signals into a first channel signal and a second channel signal, combined power thereof through channel switching; an antenna controlling unit for driving an antenna system in an azimuth and elevation angle to direct the satellite according to the power combined second channel signal from the beam shaping unit; a first triplexer unit for outputting the power combined first channel signal to a rotary joint unit; a second triplexer unit for converting the first channel signal inputted to a downlink frequency and providing the converted first channel signal to the indoor apparatus.

Abstract: An RF MEMS switch using a fine liquid metal droplet is provided. The RF MEMS switch using a fine liquid metal droplet includes: a first layer member having a signal transmission line; a second layer member disposed on the first layer member, and having a chamber formed corresponding to the signal transmission line so as to induce a change in the shape of the fine liquid metal droplet and a through hole formed at one side of the chamber so as to bring the fine liquid metal droplet, whose shape is to be changed in the chamber, into contact or non-contact with the signal transmission line; an operating member disposed on the second layer member, and provided at an open side of the chamber so as to provide deformability to the fine liquid metal droplet through the open side of the chamber; and a third layer member for defining the position of the operating member, and coupled to the first layer member and the second layer member.

Abstract: An image reconstruction apparatus includes: a transmission signal generation unit configured to generate a transmission signal in an image reconstruction region, in order to acquire an image reconstruction value; an electromagnetic wave measurement unit configured to measure electromagnetic waves by receiving the transmission signal; an image reconstruction unit configured to update a parameter by using a matrix of matched system of a Sinc-Gauss-shaped basis function which is allocated to each node of a reconstruction mesh in the image reconstruction region, and generate an image reconstruction value; and an optimization determination unit configured to determine whether the parameter of the image reconstruction unit is optimized or not, and output the image reconstruction value or cause the image reconstruction unit to repetitively perform the calculation, wherein the reconstruction mesh has a grid structure of which the size is larger than that of a forward mesh and equal to the image spatial resolution.

Abstract: Disclosed is an electro-magnetic tomography including: a modulator configured to modulate a generated transmit reference signal using a pseudo-noise signal; a transmitter configured to transmit the signal modulated by the modulator; a receiver configured to receive a signal transmitted from a transmitter; an amplitude detector configured to compare an amplitude magnitude between the signal received by the receiver and the transmit reference signal to measure a received amplitude; and a demodulator configured to demodulate the signal received by the receiver using the pseudo-noise signal to generate a cyclic signal, compare a phase between the transmit reference signal and the cyclic signal to measure the phase of the cyclic signal, and determine the phase of the received signal based on the phase of the measured cyclic signal.

Abstract: Disclosed is an image reconfiguration method for electro-magnetic tomography.

Abstract: Provided is an antenna system for tracking a satellite which includes a fixed body and a rotating body. The antenna system includes a transmitting/receiving unit having a transmitting channel and a receiving channel for signal power, a driving unit for enabling mechanical motion of the rotating body for satellite tracking, and a control unit for monitoring and controlling the operation of the driving unit. Accordingly, the various kinds of the components of the antenna system mounted and operated on the movable body can be minimized and the output of the transmitted signal required in the antenna system can be simply replaced, thereby simplifying the configuration of the system and reducing the production cost of the system. In addition, the STR having the tracking signal processing function in the digital mode as well as the general analog mode is mounted on the antenna system, thereby improving accuracy of satellite tracking.