Abstract: Disclosed are novel compounds of Chemical Formula 1, optical isomers of the compounds, and pharmaceutically acceptable salts of the compounds or the optical isomers. The compounds, isomers, and salts exhibit excellent activity as GLP-1 receptor agonists. In particular, they, as GLP-1 receptor agonists, exhibit excellent glucose tolerance, thus having a great potential to be used as therapeutic agents for metabolic diseases. Moreover, they exhibit excellent pharmacological safety for cardiovascular systems.

Abstract: In various embodiments, an antenna array may comprise a dielectric; a first patch antenna disposed on a first region of the dielectric; a second patch antenna disposed on a second region of the dielectric; and a ground layer including a first sub-ground layer in contact with a lower portion of the first region of the dielectric, a third sub-ground layer in contact with a lower portion of the second region of the dielectric, and a second sub-ground layer spaced apart from a lower portion between the first region and the second region of the dielectric.

Abstract: In various embodiments, an antenna array may comprise a dielectric; a first patch antenna disposed on a first region of the dielectric; a second patch antenna disposed on a second region of the dielectric; and a ground layer including a first sub-ground layer in contact with a lower portion of the first region of the dielectric, a third sub-ground layer in contact with a lower portion of the second region of the dielectric, and a second sub-ground layer spaced apart from a lower portion between the first region and the second region of the dielectric.

Abstract: In various embodiments, a metamaterial structure antenna may comprise: a feed line for feeding a signal; a ground plane comprising a cross-shaped aperture forming circular polarization on the basis of a magnetic field induced by the fed signal; and a patch plane formed parallel to the ground plane which emits electromagnetic waves on the basis of the circular polarization.

Abstract: The present disclosure relates to a technology for designing a transmitarray antenna based on the mode and incidence angle of feed radio waves. The transmitarray antenna according to one embodiment of the present disclosure includes a plurality of transmitting surface unit cells having different surface structures and different longitudinal lengths located in a plurality of regions, wherein the transmitting surface unit cells are arranged in a mixed manner in the regions based on the different longitudinal lengths and the phase of a transmission coefficient determined based on an input phase and an output phase based on the mode and incidence angle of radio waves transmitted from a feed antenna.

Abstract: A hybrid antenna used for an electronic device is disclosed. A hybrid antenna comprises: a substrate comprising a first surface and a second surface and having an insulator; a first conductive member disposed on the first surface of the substrate and having a hole formed therein; a second conductive member disposed on a first area of the second surface of the substrate; and a third conductive member disposed on a second area of the second surface of the substrate and connected to a ground of an electronic device, wherein a first portion of the first conductive member operates as a first antenna for receiving a broadband signal and supplying power to the electronic device, and a second portion operates as a second antenna for receiving wireless power and supplying power to the electronic device, wherein a first power feeding unit is formed between the first antenna and second antenna.

Abstract: The present disclosure relates to a technology for designing a transmitarray antenna based on the mode and incidence angle of feed radio waves. The transmitarray antenna according to one embodiment of the present disclosure includes a plurality of transmitting surface unit cells having different surface structures and different longitudinal lengths located in a plurality of regions, wherein the transmitting surface unit cells are arranged in a mixed manner in the regions based on the different longitudinal lengths and the phase of a transmission coefficient determined based on an input phase and an output phase based on the mode and incidence angle of radio waves transmitted from a feed antenna.

Abstract: Provided is a directional monopole array antenna using a hybrid ground plane in which a plurality of monopole antennas are connected in a form of an array, wherein the monopole antennas includes: a ground plane designed to be divided into a PMC (perfect magnetic conductor) and a PEC (perfect electric conductor) such that a surface current induced in the PEC flows in a direction; and an antenna device vertically disposed in the ground plane.

Abstract: In various embodiments, a metamaterial structure antenna may comprise: a feed line for feeding a signal; a ground plane comprising a cross-shaped aperture forming circular polarization on the basis of a magnetic field induced by the fed signal; and a patch plane formed parallel to the ground plane which emits electromagnetic waves on the basis of the circular polarization.

Abstract: A hybrid antenna used for an electronic device is disclosed. A hybrid antenna comprises: a substrate comprising a first surface and a second surface and having an insulator; a first conductive member disposed on the first surface of the substrate and having a hole formed therein; a second conductive member disposed on a first area of the second surface of the substrate; and a third conductive member disposed on a second area of the second surface of the substrate and connected to a ground of an electronic device, wherein a first portion of the first conductive member operates as a first antenna for receiving a broadband signal and supplying power to the electronic device, and a second portion operates as a second antenna for receiving wireless power and supplying power to the electronic device, wherein a first power feeding unit is formed between the first antenna and second antenna.

Abstract: A beam steering system of a high-gain antenna includes an antenna configured to include a printed circuit board in which an antenna element is designed, and a ground plane, wherein the printed circuit board and the ground plane may be each adhered onto upper and lower surfaces of the antenna; a paraelectric material configured to be separated from the upper surface of the antenna with a predetermined distance and is divided into a plurality of cells, whose relative permittivity varies depending on a voltage applied to a pair of thin metallic conductor patches adhered to upper and lower surfaces of each cell; and a power supply unit configured to supply the voltage to the pair of thin metallic conductor patches which are each adhered to the upper and lower surfaces of the cell to face each other.

Abstract: An apparatus for transmitting simultaneous multiple beams to targets at near and far fields includes: a communication unit consisting of a plurality of unit cells, and configured to communicate a signal or power via antennas provided in each of the unit cells; and a control unit configured to calculate a phase of a voltage applied to the antennas so as to simultaneously transmit the power or signal to the targets at the near and far fields.

Abstract: Provided is a directional monopole array antenna using a hybrid ground plane in which a plurality of monopole antennas are connected in a form of an array, wherein the monopole antennas includes: a ground plane designed to be divided into a PMC (perfect magnetic conductor) and a PEC (perfect electric conductor) such that a surface current induced in the PEC flows in a direction; and an antenna device vertically disposed in the ground plane.

Abstract: A beam steering system of a high-gain antenna includes an antenna configured to include a printed circuit board in which an antenna element is designed, and a ground plane, wherein the printed circuit board and the ground plane may be each adhered onto upper and lower surfaces of the antenna; a paraelectric material configured to be separated from the upper surface of the antenna with a predetermined distance and is divided into a plurality of cells, whose relative permittivity varies depending on a voltage applied to a pair of thin metallic conductor patches adhered to upper and lower surfaces of each cell; and a power supply unit configured to supply the voltage to the pair of thin metallic conductor patches which are each adhered to the upper and lower surfaces of the cell to face each other.

Abstract: A wireless power transmission method includes searching for one or more routes to be used to transmit power to a reception resonator through one or more relay resonators, and converting the routes to respective one or more two-port networks. The method further includes calculating a transmission efficiency of each of the routes based on the two-port networks, and selecting a route with a highest transmission efficiency from the routes. The method further includes wirelessly transmitting power to the reception resonator through the selected route.

Abstract: A source resonator for wirelessly transmitting power to a target device may include a magnetic field distribution adjusting unit that is configured to adjust the magnetic field generated by the source resonator. In one or more embodiments, the magnetic field distribution adjusting unit may adjust the magnetic field to be substantially uniform in a predetermined vicinity of the source resonator. For example, the magnetic field distribution adjusting unit may adjust the intensity of the magnetic field near the center of the source resonator to be substantially the same as the intensity of the magnetic field near an edge area of the source resonator.

Abstract: An antenna for a radar detector according to the present invention comprises: a power supply unit; first and second branches branched from the power supply unit; a first band patch antenna connected to the first branch and having first band properties; a second band patch antenna connected to the second branch and having second band properties; a second band stub placed between the power supply unit and the first band patch antenna on the first branch; and a first band stub placed between the power supply unit and the second band patch antenna on the second branch. The antenna for the radar detector according to the present invention may match one power supply unit without damaging the properties of a plurality of antennas that have different frequency properties.

Abstract: A wireless power transmission system and a multi-mode resonator in the wireless power transmission system are provided. The multi-mode resonator includes a transmission line portion including unit-cells, the unit-cells including respective ends connected to each other, and each of the unit-cells including a capacitor, an inductor connected in parallel to the capacitor, and a via. The multi-mode resonator further includes a ground conducting portion configured to provide an electrical ground to the transmission line portion through the via of each of the unit-cells.

Abstract: Provided is a backward-wave oscillator in a communication system, including a waveguide formed of a metamaterial. A unit structure of the waveguide may include: a top plate; a short-circuited stub; a bottom plate separated at a predetermined gap from the top plate, and having the short-circuited stub formed in the center thereof; a first metal pillar connecting the top plate at a first port positioned on one surface based on the short-circuited stub to the bottom plate at a second port positioned on the opposite surface of the first port based on the short-circuited stub; and a second metal pillar separated from the first metal pillar, and connecting the top plate at the second port to the bottom plate at the first port.

Abstract: Provided is a backward-wave oscillator in a communication system, including a waveguide formed of a metamaterial. A unit structure of the waveguide may include: a top plate; a short-circuited stub; a bottom plate separated at a predetermined gap from the top plate, and having the short-circuited stub formed in the center thereof; a first metal pillar connecting the top plate at a first port positioned on one surface based on the short-circuited stub to the bottom plate at a second port positioned on the opposite surface of the first port based on the short-circuited stub; and a second metal pillar separated from the first metal pillar, and connecting the top plate at the second port to the bottom plate at the first port.