Abstract: Provided is a small monopole antenna having a loop feeder. The small monopole antenna having a loop feeder includes: a loop element forming a loop along a predetermined plane and having a loop feeder at the center thereof; a non-feeding type monopole antenna element including one end connected to a wire of the loop element and other end connected to a ground unit by being bended at the center of the loop element; a ground unit for grounding other end of the non-feeding type monopole antenna; and a first connecting unit for connecting the non-feeding type monopole antenna to an external device for feeding the loop feeder of the loop element through the non-feeding type monopole antenna.

Abstract: A wearable apparatus for detecting an underground object includes: a signal transmitter configured to transmit a predetermined signal in a predetermined direction; a reception detection sensor configured to receive a reflected wave corresponding to the transmitted signal; a wireless reception unit configured to restore the received reflected wave to a received signal; and an acknowledgement signal processing unit configured to analyze whether the underground object exists or not, based on the restored received signal, and generate first and second acknowledgement signals depending on whether the underground object exists or not.

Abstract: A transportation apparatus configured to travel on rails and having an induced freezing rail system includes: a transportation vehicle having a support unit configured to support a frame from the rails; and a freezing rail system comprising freezing rails positioned on a ground surface corresponding to the support unit of the transportation vehicle, the freezing rails having a refrigerant and cooling devices.

Abstract: Disclosed is an indoor electromagnetic environment implementing structure. A shield room in a polyhedron structure for blocking electromagnetic waves output from the interior toward the exterior thereof and electromagnetic waves input from the exterior toward the interior when measuring a characteristic of the electromagnetic waves is installed, an electromagnetic wave absorber is installed at a door and a window on a wall through which the electromagnetic waves are output in the shield room, and a cover for covering the electromagnetic wave absorber with a size corresponding to the electromagnetic wave absorber is installed. In this instance, the cover transmits or blocks the electromagnetic waves according to utilization of electromagnetic wave measurement tests.

Abstract: A semiconductor chip includes: a semiconductor substrate having a plurality of electronic elements therein; a metal circuit pattern formed on the semiconductor substrate and allowing the plurality of electronic elements to be electrically connected to one another; and dummy metal patterns formed on the semiconductor substrate and the metal circuit pattern to suppress a predetermined specific frequency ranges.

Abstract: An apparatus for measuring radiated power of a terminal includes: an enclosure including a pair of couplers configured to couple an electromagnetic field radiated from the terminal or a substitution antenna and a measurement jig configured to rotate the terminal or the substitution antenna, the terminal or the substitution antenna being supposed to be arranged between the pair of couplers, with reference to at least one of X, Y, and Z axes; a driver installed outside the enclosure to drive the measurement jig; a signal generator configured to generate a feed signal transferred to the substitution antenna when the substitution antenna is arranged on the measurement jig; a feed signal transmitter configured to transfer the feed signal generated by the signal generator to the substitution antenna; and a spectrum analyzer configured to measure power of a radiated signal radiated from the terminal or the substitution antenna.

Abstract: The present invention relates to a method for estimating an optimized transmission bit rate in a wireless local area network (LAN) system, which is to provide an accurate data transmission bit rate according to channel status when block data are transmitted in the wireless LAN system. According to the present invention, there is provided a method for estimating an optimized transmission bit rate according to the status of a data transmission bit rate in a wireless LAN system, comprising the steps of determining whether to change a current data transmission bit rate in a wireless LAN network; and estimating an optimized transmission bit rate on the basis of results of the determination in the determining step, and reflecting the estimated transmission bit rate upon transmission of data. The method is effective in that when data blocks are transmitted in the wireless LAN system, the performance degradation of data transmission invited due to an inappropriate selection of a transmission bit rate can be reduced.

Abstract: A terminal, a method for operation of the terminal, and a method of interworking in a wireless communication system including an advanced network and a legacy network are provided. The method for operating the terminal includes monitoring a paging channel of the legacy network for a data paging message and a Circuit Switched (CS) paging message, when the terminal is in an idle state, receiving one of the CS paging message and data paging message, establishing a connection with the legacy network corresponding to the received one of the CS paging message and data paging message, wherein a CS voice connection is established with the legacy network if the CS paging message is received and a Packet Switched (PS) data connection is established with the legacy network if the data paging message is received, and performing a handover to the advanced network from the legacy network, if the PS data connection is established with the legacy network.

Abstract: A terminal and an advanced Base Station (BS), and methods for their operation in a wireless communication system including an advanced network that provides a data service and a legacy network that provides a Circuit Switched (CS) voice service, are provided. The method for operating the terminal includes monitoring a paging channel of the advanced network for a data paging message and a paging channel of the legacy network for a CS paging message, when the terminal is in an idle state, receiving one of the CS paging message and data paging message, and establishing a connection with the one of the advanced network and the legacy network corresponding to the received one of the CS paging message and data paging message.

Abstract: A reference current bias circuit includes a self-bias circuit configured to provide a bias current to an amplifier; a basic bandgap circuit coupled to inputs of the amplifier; a startup circuit configured to support an initial operation of the amplifier; a temperature compensator configured to include a first mirroring unit for mirroring current according to a positive temperature coefficient characteristic from the basic bandgap circuit; and a second mirroring unit for mirroring current according to a negative temperature coefficient characteristic from the basic bandgap circuit, and to provide a reference current by combining the current of the first mirroring unit and the current of the second mirroring unit; and a reference current mirroring unit configured to generate reference current biases based on the reference current from the temperature compensator.

Abstract: Provided is a transmitting/receiving isolation antenna that can perform wireless bi-directional communication in the co-channel, co-polarization and co-time by acquiring high isolation from transmitting and receiving antennas having co-time, co-channel and co-polarization and set up adjacently. The isolation antenna includes a first antenna; second and third antennas symmetrically positioned in the same distance from the first antenna; a shielding unit symmetrically positioned between the first and second antennas, and between the first and third antennas; and a signal removing unit for removing a signal transmitted from the first antenna to the second and third antennas.

Abstract: An ice maker, a refrigerator including the ice maker, and an ice making method are provided. The ice maker includes a tray having a predetermined length and to which water is supplied to make ice. The ice maker is configured to mechanically separate the ice from the tray by using pistons which are driven by being pressed by structures. This allows the ice maker to have a reduced size, and a small occupation area, thereby implementing a slim configuration of a refrigerator. Furthermore, since an installation height of the ice maker is lowered, a path for supplying cool air may be shortened. This may prevent loss of cool air being supplied to the ice making chamber. Since the ice maker has a simplified configuration and precise operation controls, the fabrication costs may be reduced, and inferiority of the ice maker due to malfunctions may be prevented.

Abstract: An ice maker, a refrigerator including the ice maker, and an ice making method are provided. The ice maker includes a tray having a predetermined length into which water is supplied to make ice. The ice maker is configured to mechanically separate the ice from the tray by using pistons which are driven by a motor. This permits the ice maker to have a reduced size, and occupy a small area, thereby implementing a slim configuration of a refrigerator. Furthermore, since an installation height of the ice maker is lowered, a path for supplying cool air may be shortened. This arrangement prevent loss of cool air being supplied to the ice making chamber.

Abstract: Provided is a method for measuring inverse scattering wave, which includes installing a scattering object which is a test object in a coupler, feeding an electrical signal to an input terminal of the coupler, terminating an output terminal and an isolation terminal of the coupler so that the electrical signal scattered by colliding with the scattering object is transmitted to a coupling terminal of the coupler, and measuring intensity of the electrical signal transmitted to the coupling terminal. In addition, provided is an apparatus for identifying an inferior Radio Frequency IDentification (RFID) transponder and an inferior RFID reader by using the method for measuring the inverse scattering wave. Accordingly, the installation cost thereof is reduced. Furthermore, the facilities for the measurement can be installed in a narrow space, and the measurement can be done regardless of an external electromagnetic wave environment.

Abstract: A voltage-controlled oscillator robust against power supply includes: a regulating unit configured to maintain a virtual power supply of a VCO core circuit in a stable condition with regard to a reference voltage; and a power supply removal unit including second transistors configured to correspond to respective first transistors of the regulating unit, the power supply removal unit being configured to remove power noise of the virtual power supply by using negative feedback through a closed-circuit loop formed by each of the first and second transistors.

Abstract: An ice maker, a refrigerator including the ice maker, and an ice making method are provided. The ice maker includes a tray having a predetermined depth into which water is supplied to make ice. The ice maker includes an elevating unit to elevate a portion of the ice, and a cutting unit to cut off the elevated portion of the ice to be dispensed as ice pieces to a user. The ice maker has a slim configuration, and a compact size. The ice maker may be provided in the door of the refrigerator at a height approximately the same as the height of the dispenser located at the front side of the door. This arrangement permits a path for supplying cool air from a freezing compartment to the ice maker to be decreased.

Abstract: Provided is an apparatus for harvesting energy from a microwave. An apparatus for harvesting energy from a microwave in an electricity storage system of a building, includes: a plurality of rectennas arranged with a predetermined length according to characteristic of microwave to be absorbed, and configured to collect microwave in the atmosphere and convert the collected microwave into electric energy; a current converter configured to convert the electric energy outputted from the rectennas into a storable current; and a charging tank configured to store the current outputted from the current converter, wherein the arranged rectennas are attached to an outer wall of the building, and the rectennas attached to the top of the building are printed in a transparent conductor on the surface of a solar cell.

Abstract: A refrigerator and its operation method are disclosed. Cool air ducts guide cool air from a freezing compartment to an ice compartment that is positioned at a refrigerating compartment door. At least a portion of the cool air ducts are located at a barrier that separates the freezing compartment and the refrigerating compartment.

Abstract: A refrigerator is provided. The refrigerator includes a refrigerator main body including a cooling chamber, a door for opening or closing the cooling chamber, an ice making chamber located at the door, a sub-chamber located at the door and spaced from the ice making chamber, the sub-chamber being configured to receive cool air from the cooling chamber, and a cold energy transfer unit configured to transfer energy of cool air of the sub-chamber to the ice making chamber.

Abstract: The present invention relates to an apparatus and method for receiving an antenna measuring signal, and a system of measuring an antenna. In particular, the present invention relates to an apparatus and method for receiving an antenna measuring signal that can remove a measurement error caused by motion of an antenna cable, and a system for measuring an antenna. According to the apparatus and method for receiving an antenna measuring signal and the system and method for measuring an antenna according to the present invention, it is possible to remove a coupling effect of an RF cable of a receiving antenna side while measuring antenna characteristics, thereby minimizing a measurement error of the antenna.