Abstract: Disclosed herein is a radar device. The radar device can implement a virtual antenna with high spatial resolution having a two-dimensional (2D) distribution of received beams using a plurality of transmitting and a plurality of receiving antennas.

Abstract: The present invention relates to a base station antenna comprising: a reflective plate; at least one first band radiation element positioned on the upper surface of the reflective plate, including a first power feed unit, and having a first wavelength (?H); and at least one second band radiation element positioned on the upper surface of the reflective plate, including a second power feed unit, and having a second wavelength (?L), wherein the first power feed unit is connected to a power feed line on the lower surface of the reflective plate, and the power feed line is shorted with the reflective plate at a short point spaced apart at a preset interval from the first band radiation element.

Abstract: A patch antenna and a radar apparatus having different beam tilts with respect to frequencies are provided. In the patch antenna including a plurality of patches arranged along a power feed line, lengths of patches relating to a resonant frequency are implemented to be different from distances between patches relating to a radiation angle in the elevation direction without mechanical tilting. Thus, the patch antenna can easily expand coverage in the elevation direction without raising a noise floor, and since a gain is high, the patch antenna can detect a smaller object.

Abstract: Disclosed herein is a radar device. The radar device can implement a virtual antenna with high spatial resolution having a two-dimensional (2D) distribution of received beams using a plurality of transmitting and a plurality of receiving antennas.

Abstract: The present invention relates to a base station antenna comprising: a reflective plate; at least one first band radiation element positioned on the upper surface of the reflective plate, including a first power feed unit, and having a first wavelength (?H); and at least one second band radiation element positioned on the upper surface of the reflective plate, including a second power feed unit, and having a second wavelength (?L), wherein the first power feed unit is connected to a power feed line on the lower surface of the reflective plate, and the power feed line is shorted with the reflective plate at a short point spaced apart at a preset interval from the first band radiation element.

Abstract: A multi-port phase shifter includes a ground, a first line on one surface of the ground, a second line on the other surface of the ground, a third line spaced at a predetermined distance from the upper surface of the first line and facing a part of the first line, and a fourth line spaced at a predetermined distance from the upper surface of the second line and facing a part of the second line. A via hole penetrates the ground. A power supply line on the one surface of the ground includes a region having the via hole. Multiple ports make the phase shifter applicable to a sector antenna for obtaining a high gain. Phase shifter volume can be reduced by implementing multiple ports in one phase shifter without coupling two or more phase shifters, thereby eliminating an additional component such as a fixing pole or a connecting pole.

Abstract: A short-range magnetic field system according to an embodiment includes a transmission antenna part located at a transmission port; and a reception antenna part located at a reception port to face the transmission antenna part. wherein a magnetic field formed around the transmission antenna part or the reception antenna part can be offset.

Abstract: A multi-port phase shifter includes a ground, a first line on one surface of the ground, a second line on the other surface of the ground, a third line spaced at a predetermined distance from the upper surface of the first line and facing a part of the first line, and a fourth line spaced at a predetermined distance from the upper surface of the second line and facing a part of the second line. A via hole penetrates the ground. A power supply line on the one surface of the ground includes a region having the via hole. Multiple ports make the phase shifter applicable to a sector antenna for obtaining a high gain. Phase shifter volume can be reduced by implementing multiple ports in one phase shifter without coupling two or more phase shifters, thereby eliminating an additional component such as a fixing pole or a connecting pole.

Abstract: The present invention relates to an array antenna apparatus, comprising: a first antenna element arranged in the center of the outermost concentric circle having a radius determined according to the beam width of a beam to transmit; and antenna element sets arranged on the circumference of each of concentric circles arranged to have a predetermined interval within the outermost concentric circle, wherein each of the antenna element sets comprises an odd number of second antenna elements, and only one antenna element exists on a straight line corresponding to the radius.

Abstract: A short-range magnetic field system according to an embodiment includes a transmission antenna part located at a transmission port; and a reception antenna part located at a reception port to face the transmission antenna part. wherein a magnetic field formed around the transmission antenna part or the reception antenna part can be offset.

Abstract: A method for adjusting a beam pattern in a beam pattern adjusting apparatus in a communication system supporting a Beam Division Multiple Access (BDMA) scheme is provided. The method includes determining whether a Voltage Standing Wave Ratio (VSWR) value for each antenna included in an antenna array included in the beam pattern adjusting apparatus is greater than or equal to a threshold VSWR value, if it is determined that an antenna of the antenna array has a VSWR value that is greater than or equal to the threshold VSWR, detecting whether each of the antenna elements is operable, and if it is determined that at least one of the antennas is inoperable, adjusting a beam pattern of at least one of the antennas that is operable.

Abstract: The present invention relates to an array antenna apparatus, comprising: a first antenna element arranged in the center of the outermost concentric circle having a radius determined according to the beam width of a beam to transmit; and antenna element sets arranged on the circumference of each of concentric circles arranged to have a predetermined interval within the outermost concentric circle, wherein each of the antenna element sets comprises an odd number of second antenna elements, and only one antenna element exists on a straight line corresponding to the radius.

Abstract: A method for adjusting a beam pattern in a beam pattern adjusting apparatus in a communication system supporting a Beam Division Multiple Access (BDMA) scheme is provided. The method includes determining whether a Voltage Standing Wave Ratio (VSWR) value for each antenna included in an antenna array included in the beam pattern adjusting apparatus is greater than or equal to a threshold VSWR value, if it is determined that an antenna of the antenna array has a VSWR value that is greater than or equal to the threshold VSWR, detecting whether each of the antenna elements is operable, and if it is determined that at least one of the antennas is inoperable, adjusting a beam pattern of at least one of the antennas that is operable.

Abstract: A non-rotating electrodeless high-intensity discharge lamp system using circularly polarized microwaves. The lamp system has a first rectangular waveguide to propagate linearly polarized microwaves generated from a microwave source; an input circular waveguide linearly connected to the first rectangular waveguide; a second rectangular waveguide closed at an end thereof, and perpendicularly connected to a circumferential surface of the input circular waveguide; an elliptical waveguide linearly connected to the input circular waveguide such that the major axis of the elliptical waveguide is rotated to a predetermined angle relative to a horizontal surface of the input rectangular waveguide; a second circular waveguide linearly connected to the elliptical waveguide; and a discharge lamp housed in a mesh cover, and supported by the second circular waveguide while being held on a reflecting mirror.

Abstract: A non-rotating electrodeless high-intensity discharge lamp system using circularly polarized microwaves is herein disclosed. In an embodiment, the lamp system has a first rectangular waveguide (1) to propagate linearly polarized microwaves generated from a microwave source; an input circular waveguide (2) linearly connected to the first rectangular waveguide; a second rectangular waveguide (3) closed at an end thereof, and perpendicularly connected to a circumferential surface of the input circular waveguide; an elliptical waveguide (4) linearly connected to the input circular waveguide such that the major axis of the elliptical waveguide is rotated to a predetermined angle relative to a horizontal surface (or the wider surface) of the input rectangular waveguide; a second circular waveguide (6) linearly connected to the elliptical waveguide; and a discharge lamp (5) housed in a mesh cover (7), and supported by the second circular waveguide while being held on a reflecting mirror (9).