Abstract: An embodiment of the present disclosure provides a thermal processing apparatus and an operation method thereof capable of controlling a heat distribution of a substrate at a low cost in a thermal processing process using a microwave. According to the present disclosure, a thermal processing apparatus includes a chamber that forms a thermal processing space of a substrate, a substrate support unit that is located at a lower portion of the thermal processing space and supports the substrate, and a microwave unit that is located at an upper portion of the thermal processing space and forms an electromagnetic field by the microwave in the thermal processing space.

Abstract: Provided is an in-band full-duplex MIMO antenna, which includes: a substrate; and transmission antenna elements and reception antenna elements separately coaxially disposed on the same plane of the substrate, in which the transmission antenna elements have a first polarization characteristic, and the reception antenna elements have a second polarization characteristic different from the first polarization characteristic.

Abstract: Provided is an in-band full-duplex MIMO antenna, which includes: a substrate; and transmission antenna elements and reception antenna elements separately coaxially disposed on the same plane of the substrate, in which the transmission antenna elements have a first polarization characteristic, and the reception antenna elements have a second polarization characteristic different from the first polarization characteristic.

Abstract: Provided is a planar multipole antenna, and more particularly, to a planar multipole antenna which is capable of adjusting a beam width and a band characteristic and reducing the size. The planar multipole antenna includes a plurality of radiators formed above a conductor plate, the plurality of radiator includes a main radiator and a plurality of additional radiators, the main radiator includes a signal applying hole to which a signal is applied, and the additional radiator is connected to a ground formed on the conductor plate.

Abstract: Provided is a planar multipole antenna, and more particularly, to a planar multipole antenna which is capable of adjusting a beam width and a band characteristic and reducing the size. The planar multipole antenna includes a plurality of radiators formed above a conductor plate, the plurality of radiator includes a main radiator and a plurality of additional radiators, the main radiator includes a signal applying hole to which a signal is applied, and the additional radiator is connected to a ground formed on the conductor plate.

Abstract: A switch matrix, a switch matrix assembly, and a magnetic resonance imaging (MRI) apparatus are disclosed. The switch matrix includes a first path to which an electric signal is applied; a first switching unit configured to selectively and electrically interconnect a first input unit and a first end of the first path or to open the first end of the first path; and a second switching unit configured to selectively and electrically connect a second input unit to a second end of the first path or to open the second end of the first path.

Abstract: A magnetic resonance imaging (MRI) device includes at least one switching cell that uses a first switcher to switch paths for two of four radio frequency (RF) signals is used to output the two RF signals. The MRI device includes RF coils including a plurality of coils for receiving RF signals from an object to which magnetic fields are applied; an image processor for creating a magnetic resonance image based on the received RF signals; and a switching unit for switching connections between a plurality of input ports connectable to the plurality of coils and a plurality of output ports connectable to the image processor, wherein the switching unit includes at least one switching cell including four input ports, two output ports connected to two of the four input ports, and a first switcher for switching between paths extended from second and third input ports among the four input ports.

Abstract: A device for switching a connection relationship between an input channel and an output channel group determined according to a selection mode, a magnetic resonance imaging (MRI) apparatus including the switching device, and a method for controlling the MRI apparatus are disclosed. The device includes: a plurality of input channels capable of being respectively connected to a plurality of coils, each of which receives a radio frequency (RF) signal from a target object to which a magnetic field is applied; a plurality of output channels capable of being connected to an image processor designed to generate a magnetic resonance image on the basis of the received RF signal; and a switching portion configured to switch a connection relationship between the plurality of input channels and the plurality of output channels.

Abstract: A switch matrix, a switch matrix assembly, and a magnetic resonance imaging (MRI) apparatus are disclosed. The switch matrix includes a first path to which an electric signal is applied; a first switching unit configured to selectively and electrically interconnect a first input unit and a first end of the first path or to open the first end of the first path; and a second switching unit configured to selectively and electrically connect a second input unit to a second end of the first path or to open the second end of the first path.

Abstract: A magnetic resonance imaging (MRI) device includes at least one switching cell that uses a first switcher to switch paths for two of four radio frequency (RF) signals is used to output the two RF signals. The MRI device includes RF coils including a plurality of coils for receiving RF signals from an object to which magnetic fields are applied; an image processor for creating a magnetic resonance image based on the received RF signals; and a switching unit for switching connections between a plurality of input ports connectable to the plurality of coils and a plurality of output ports connectable to the image processor, wherein the switching unit includes at least one switching cell including four input ports, two output ports connected to two of the four input ports, and a first switcher for switching between paths extended from second and third input ports among the four input ports.

Abstract: The present invention provides a multi-port amplifier which adopts a pair of SP4T switches and a pair of hybrid couplers in order to flexibly adjust an amplification mode. By using the proposed invention, the limited system flexibility and reconfigurability due to fixed input and output relations are overcome regardless of a component failure in a system. Moreover, signal amplification based on effective signal distribution and combination can be consistently performed according to various port configurations by different switching modes. Thus, the overall practicality of outputs comparing to the conventional multi-port amplifier can be effectively increased within an available lifespan of the system.

Abstract: A convertible apparatus comprises a foldable object and a hood attached to the foldable object. The foldable object is configured to be capable of folding and stuffing into the hood. One or more fasteners are capable of securing the foldable object within the hood after folding.

Abstract: Provided is a phase shifter for shifting a phase of a signal the phase shifter including an input unit to split an input signal into a plurality of signals having different phases, a connection unit to change at least one of magnitudes and phases of the plurality of signals, apply the changed plurality of signals to a plurality of loads, and receive a plurality of return signals generated when the applied signals are returned by the plurality of loads, and an output unit to generate an output signal having a predetermined phase difference from the input signal based on the return signals.

Abstract: A plush toy comprises a malleable outer covering and a malleable inner filler. One or more sensors are configured to detect folding and unfolding of the plush toy. A speaker is provided. A controller causes the speaker to produce context sensitive sounds depending on the folding and unfolding of the plush toy.

Abstract: A method for Symbol Error Rate (SER) approximation of an SER-based transmission power allocation operation for an Orthogonal Space Time Block Code in a DWCS equipped with multiple transmission Distributed Antennas (DA) geographically dispersed at random. The method for SER approximation includes the steps of: setting multiple combinable antenna subsets from the multiple DAs; selecting a quasi-optimal antenna subset Ag (1?g?2n?1) having a quasi-optimal power allocation weight wg based on predetermined power allocation, for each of the set multiple antenna subsets; and calculating an SER approximation value of the selected quasi-optimal antenna subset by applying a Probability Density Function (PDF) of a Signal-to-Noise Ratio (SNR) to the OSTBC SER having symbol constellation of a predetermined modulation scheme. The output of the SER approximation value can be output to a transmitter, or to a space-time encoder of a central processor for optimal power transmission.

Abstract: Disclosed is a device for allocating transmission power using a symbol error rate (SER) for orthogonal space-time block codes (OSTBC) in a wireless communication system. The device includes: a plurality of antennas, which are distributed geographically and independently linked to a central processing unit; a receiver to select an optimum subset of the SER performance, using a preset power allocation to each of available antenna subset combinations, and sending the selected subset to a transmitter; and a central processing unit to allocate power by applying an OSTBC symbol having a unit average power to the optimum subset from the receiver.

Abstract: A wired relay method for using a remote station and an apparatus thereof for a Radio over Fiber (RoF) wired relay system supporting a Time Division Duplexing (TDD) wireless communication service, which shares an Low-Noise Amplifier (LNA) for both uplink and downlink operations. The remote station includes a block for dividing each of a downlink optical signal carrying service data and an optical signal carrying transmission/reception control information of the RoF wired relay system, which are input from a base station, a gain controller for separating an uplink Radio Frequency (RF) signal input from an antenna or a portion of a downlink RF signal output from a High-Power Amplifier (HPA) and for monitoring the strength of the input and output RF signals in order to control a gain of the LNA.

Abstract: A radio over fiber link apparatus for transmitting/receiving radio frequency up/downlink signals in a TDD mobile communication system. The radio over fiber link apparatus includes a center site for receiving radio frequency signals from an access point of the mobile communication system. The center site has a first electro-optic converter for converting the radio frequency signals into optical signals, bias control of the first electro-optic converter being performed based on the switching of TDD signals; and a remote for transmitting the radio frequency signals to a mobile communication terminal through an antenna. The remote site has a first photoelectric converter for converting the optical signals transmitted through an optical fiber from the center site into radio frequency signals.

Abstract: An apparatus that adaptively allocates transmission power for beam-forming combined with orthogonal space time block codes in a distributed wireless communication system, the apparatus including: sub-arrays for beam-forming, which are geographically distributed and each of which includes a plurality of distributed antennas placed in random groups. A central processing unit provides predetermined combinable power allocation schemes according to subsets in a plurality of the sub-arrays, identifying performances of the schemes by using information on large-scale fading of each of the sub-arrays fed back from a receiving party, setting a subset having best performance as an optimal subset according to the identified performances, and performing power allocation according thereto.

Abstract: Disclosed is a radio-over-fiber (ROF) system for supporting various services, the system comprising: a central access platform (CAP) for providing time division duplexing (TDD), frequency division duplexing (FDD), and broadcasting services, converting a TDD downward signal and FDD/broadcasting downward signals into optical signals, respectively, transmitting the converted optical signals to a remote access unit (RAU), converting a TDD upward signal and an FDD upward signal, which have been transmitted as optical signals from the RAU, into electric signals, respectively, and using an optical circulator in order to separate upward and downward signals from each other; and the RAU for converting the TDD downward signal and FDD/broadcasting downward signals transmitted from the CAP into electric signals, respectively, converting the TDD upward signal and FDD upward signal to be transmitted to the CAP into optical signals, respectively, and using an optical circulator in order to separate upward and downward signa