Electronics and Telecommunications Research Institute

Intellectual Discovery Co., Ltd.

Eg Co., Ltd.

Dong Suk Jun

Sang Seok Lee

Dong Young Kim

Hong Yeol Lee

Tae Goo Choy

Chang Hwa Lee

Jin Woo Hahn

Bon Hee Koo

Moon Gyu Jang

Won Chul Choi

Kyoung Ik Cho

Kwang-Yong Kang

Je Ha Kim

Sungil Kim

Yong Won Kim

Kyoung Suk Ko

Eun Soo Nam

Jae Kyoung Mun

Hae Cheon Kim

Hyun Seo Kang

In-Kyu You

Yong Sung Eom

Jong Won Lim

Mun Cheol Paek

Ho Young Kim

Jong Tae Moon

Moo Jung Chu

Dong-Young Kim

Han-Cheol Ryu

Myoung Sook Oh

Kwang Seong Choi

Min Hwan Kwak

Seon Eui Hong

Yong Duck Chung

Young Shik Kang

Seung Beom Kang

Oh Gon Chun

Meyng Soo Kim

Soo Young Oh

Meyung Soo Kim

Myung Soo Kim

Provided is an apparatus for measuring a thermoelectric device. The apparatus includes a high temperature heater controlling a temperature of a first side of a sample, a low temperature heater controlling a temperature of a second side of the sample, a fine control heater controlling the temperature of the first side of the sample by a smaller unit than the high temperature heater, a temperature control and voltage measuring unit controlling the high temperature heater, the low temperature heater, and the fine control heater and measuring voltages of the first and second sides of the sample, and a thermal conductivity measuring unit measuring thermal conductivity of the sample by using a high temperature output voltage generated in the first side of the sample and a low temperature output voltage generated in the second side of the sample.

Apparatus and method for measuring thermoelectric device

Provided are a thermoelectric device and a method of manufacturing the same. The method may include forming nanowires on a substrate, forming a barrier layer on the nanowires, forming a bulk layer on the barrier layer, forming a lower electrode under the substrate, and forming an upper electrode on the bulk layer.

Thermoelectric device and method of manufacturing the same

Disclosed are a solar cell having a fan structure that provides a more pleasant life, convenience, and stability by forming, in a fan structure, a flexible color solar cell applied with a carbon dioxide absorption material, and configuring the formed flexible color solar cell through convergence of information technology, and an electronic application apparatus using the same. The electronic application apparatus using a solar cell as a power source includes: an application device body portion including a both side supporter fixed to ground, a transmitter including an antenna capable of transmitting power and data, and a data screen to thereby provide a predetermined service; and the solar cell provided in an upper end of the application device body portion, to color using a predetermined wavelength of light, and to perform solar power generation using a remaining wavelength of light.

Solar cell having fan structure and application system using the same

The exemplary embodiments of the present invention include forming a photoconductor thin film on a front surface of a substrate; forming a photoconductor thin film pattern by patterning the photoconductor thin film; and forming a metal electrode on the photoconductor thin film pattern.

Integrated antenna device module for generating terahertz continuous wave and fabrication method thereof

A terahertz continuous wave generator includes: an optical intensity modulator configured to modulate an optical signal into DSB optical signals; a local oscillator configured to generate a modulation signal for modulating the optical signal inputted to the optical intensity modulator into DSB optical signals; a notch filter configured to filter an optical signal with a specific frequency; an optical fiber amplifier configured to amplify an output signal of the optical intensity modulator; an optical circulator configured to transmit the optical signal inputted to the optical fiber amplifier to the notch filter and transmit the optical signal reflected from the notch filter to an input of the optical intensity modulator; an optical coupler configured to apply the optical signal to the optical intensity modulator; and an OE converter configured to photomix the DSB signals outputted through the notch filter.

Terahertz continuous wave generator

A sensing device may include an antenna. The antenna may include a top wafer and a bottom wafer coupled to the top wafer. The antenna may further include an air cavity between the top wafer and the bottom wafer. The sensing device may further include a substrate and an interposer disposed between the antenna and the substrate.

Sensing device having multi beam antenna array

Provided are a hetero-junction bipolar transistor (HBT) that can increase data processing speed and a method of manufacturing the hetero-junction bipolar transistor. The HBT includes a semi-insulating compound substrate, a sub-collector layer formed on the semi-insulating compound substrate, a pair of collector electrodes disposed at a predetermined distance apart from each other on a predetermined portion of the sub-collector layer, a collector layer and a base layer disposed between the collector electrodes, a pair of base electrodes disposed at a predetermined distance apart from each other on a predetermined portion of the base layer, an emitter layer stack disposed between the base electrodes, and an emitter electrode that is formed on the emitter layer stack, and includes a portion having a line width wider than the line width of the emitter layer stack, wherein both sidewalls of the emitter electrode are respectively aligned with inner walls of the pair of base electrodes, and sidewalls of the collector layer and the base layer are located between outer sidewalls of the pair of base electrodes of the pair of base electrodes.

Hetero junction bipolar transistor and method of manufacturing the same

Provided is a dielectric waveguide filter. The filter includes: a multi-layered structure of dielectric substrates having first and second ground planes at its top and bottom; first, second, and third waveguide resonators disposed at multiple layers within the multi-layered structure; converters for signal transition between input/output ports and the first and third waveguide resonators; first vias for forming the first, second, and third waveguide resonators; and second vias disposed at a boundary surface of the first waveguide resonator and the third waveguide resonator.

Dielectric waveguide filter with cross-coupling

Provided is an optical module used in a communication system employing a radio over fiber (ROF) technology delivering a radio frequency (RF) signal through an optical fiber. The optical module includes: an optical device; a signal line for transporting a radio frequency (RF) signal input from an external circuit to the optical device; and a resistor separately disposed from the signal line and having one end connected with the optical device, wherein the input impedance seen from the signal line is matched by the resistor. A bias voltage supplied to operate the optical device is applied through an inductor connected to the signal line between the optical device and a filter. Here, the filter formed by a pattern of the signal line prevents the bias voltage from being supplied to the external circuit. In order to amplify the RF signal input from the external circuit, an amplifier may be connected between the external circuit and the filter.

Optical module and optical module package

Provided is a microwave module having a converter for improving transmission characteristics in a millimeter-wave band. When a microstrip transmission line and a conductor-backed coplanar waveguide (CBCPW) transmission line are connected by wire bonding, a change in impedance caused by wire bonding and an abrupt change in electric field components between the two transmission lines are reduced by the converter. Therefore, insertion loss and return loss are reduced, and transmission characteristics in a millimeter-wave band are improved.

Microwave module having converter for improving transmission characteristics

Provided is a broadband microstrip-waveguide transition apparatus operating in a millimeter waveband. The millimeter-wave band broadband microstrip-waveguide transition apparatus includes a slot for transferring an electromagnetic signal propagating along a microstrip line, a main patch positioned between the slot and a waveguide and resonating from the signal transferred from the slot, and a parasitic patch positioned between the main patch and the waveguide and resonating together with the main patch. According to the millimeter-wave band broadband microstrip-waveguide transition apparatus, it is possible to transfer a signal from the microstrip line to the waveguide, and to increase a resonance bandwidth to a broadband level.

Millimeter-wave band broadband microstrip-waveguide transition apparatus having a main patch and a parasitic patch on different dielectric substrates

A narrowband microstrip type bandpass filter adapted for a home network, telematics, an intelligent traffic system, and a satellite Internet, includes: an input terminal for receiving a predetermined signal; an output terminal for outputting a selection signal in a characteristic band; a first resonator electrically coupled with at least a portion of the input terminal; a second resonator electrically coupled with at least a portion of the first resonator; and a third resonator electrically coupled with at least a portion of the output terminal and the second resonator. A magnetic coupling is provided using a cross coupling gap or a cross coupling line between non-adjacent resonators, so that a pattern can be simplified by optimizing the design and the manufacturing process to provide low-cost millimeter-wave parts. The manufacturing cost can be reduced by miniaturizing the parts, and the mass production can be readily realized.

Microstrip type bandpass filter

Provided is an air cavity module for a planar type filter operating in millimeter-wave frequency bands. The air cavity module includes: the planar type filter operating in the millimeter frequency bands; an air cavity having open side and top surfaces to mount the planar type filter therein; and an air cavity cover closing up the open top surface of the air cavity to allow the transmission of signals from and into the planar type filter. The air cavity module can lessen both transmission loss and radiation loss to improve the characteristics of the filter that operates in the millimeter-wave frequency bands.

Air cavity module for planar type filter operating in millimeter-wave frequency bands

Provided are a dielectric ceramic composition of forsterite system for microwave and millimeter-wave application and a method for forming the same. Here, the dielectric ceramic composition having a small dielectric loss is used for communication devices used at microwave and millimeter-wave bands. The dielectric ceramic composition includes forsterite (MgSiO) as a main element and titanium oxide (TiO), which is partially substituted for silicon (Si) in forsterite. The dielectric ceramic composition is obtained by using 56 to 57 wt % of MgO, 33 to 42 wt % of SiO, and 1 to 11 wt % of TiO, and adding an additive including Li ions as a sintering aid for improving a sintering characteristic. The dielectric ceramic composition is formed by mixing MgO, SiO, and TiO, calcining the mixture to form forsterite powder, adding an additive including Li ion, for example, LiCO, and shaping and sintering the mixture.

Dielectric ceramic composition of forsterite system for microwave and millimeter-wave application and method for forming the same

Growing community of inventors

Daejeon, South Korea

Dong Suk Jun