Abstract: There is provided a differential mode amplifier driving circuit, including: a first port having one end connected to a single signal; a second port having one end connected to a differential signal; a first transmission line having one end grounded; and a third port having one end connected to the first transmission line and the other end connected to the differential signal.

Abstract: Disclosed is a balun circuit using defected ground structure. The balun circuit using a defected ground structure includes: a substrate; a ground surface formed on one surface of the substrate, the ground surface being formed with defect structure in a previously set shape; and two transmission lines formed on the other surface of the substrate opposing the ground surface, and separated from each other, and the defect structure of the ground surface is configured to have open circuit impedance characteristics, and one of the two transmission lines is grounded. An even mode signal is removed by using the defect ground structure having the open circuit impedance characteristics, and termination of total reflection characteristics is performed by using the grounding of one of the transmission lines. Accordingly, a balun circuit can be obtained which is small in size, has little loss at high frequency, and shows little change in characteristics due to the process error.

Abstract: Embodiments of the invention provide a dielectric waveguide antenna including a dielectric waveguide transmitting a signal applied from a power feeder, a dielectric waveguide radiator radiating the signal transmitted from the dielectric waveguide to the air through a first aperture, and a matching unit formed in a portion of the dielectric waveguide and controlling a serial reactance and a parallel reactance to thereby perform impedance matching between the dielectric waveguide radiator and the air, in order to reduce reflection generated in the first aperture during the radiation of the signal through the first aperture. Reflection in the aperture is reduced through the matching unit having various structures, thereby making it possible to improve characteristics of the dielectric waveguide antenna.

Abstract: Disclosed is a balun circuit using defected ground structure. The balun circuit using a defected ground structure includes: a substrate; a ground surface formed on one surface of the substrate, the ground surface being formed with defect structure in a previously set shape; and two transmission lines formed on the other surface of the substrate opposing the ground surface, and separated from each other, and the defect structure of the ground surface is configured to have open circuit impedance characteristics, and one of the two transmission lines is grounded. An even mode signal is removed by using the defect ground structure having the open circuit impedance characteristics, and termination of total reflection characteristics is performed by using the grounding of one of the transmission lines. Accordingly, a balun circuit can be obtained which is small in size, has little loss at high frequency, and shows little change in characteristics due to the process error.

Abstract: Embodiments of the invention provide a dielectric waveguide antenna including a dielectric waveguide transmitting a signal applied from a power feeder, a dielectric waveguide radiator radiating the signal transmitted from the dielectric waveguide to the air through a first aperture, and a matching unit formed in a portion of the dielectric waveguide and controlling a serial reactance and a parallel reactance to thereby perform impedance matching between the dielectric waveguide radiator and the air, in order to reduce reflection generated in the first aperture during the radiation of the signal through the first aperture. Reflection in the aperture is reduced through the matching unit having various structures, thereby making it possible to improve characteristics of the dielectric waveguide antenna.

Abstract: A dielectric resonator antenna is disclosed that includes a multi-layer substrate on which a plurality of insulating layers and conductor layers are alternately stacked. The dielectric resonator antenna also includes a first conductor plate that has an opening part on the upper portion of the top insulating layer of the multi-layer substrate and a second conductor plate that is formed on the lower portion of the bottom insulating layer from the first conductor plate. The insulating layer is formed with at least two stacked layers and is disposed at a position corresponding to the opening part. The dielectric resonator antenna also includes a plurality of first metal via holes, a feeding part and a matching substrate that is stacked on the opening part and is stacked with at least one insulating layer.

Abstract: A dielectric resonator antenna embedded in a multilayer substrate is described. The dielectric resonator antenna includes a multilayer substrate, a first conductive plate, a second conductive plate, a plurality of first metal via holes, a feeding part configured to feed a dielectric resonator, and a conductive pattern part inserted into the dielectric resonator so that a vertical metal interface is formed in the dielectric resonator.

Abstract: Disclosed herein is a dielectric waveguide antenna including: a dielectric waveguide transmitting a signal applied from a power feeder; a dielectric waveguide radiator radiating the signal transmitted from the dielectric waveguide to the air through a first aperture; and a matching unit formed in a portion of the dielectric waveguide and controlling a serial reactance and a parallel reactance to thereby perform impedance matching between the dielectric waveguide radiator and the air, in order to reduce reflection generated in the first aperture during the radiation of the signal through the first aperture. Reflection in the aperture is reduced through the matching unit having various structures, thereby making it possible to improve characteristics of the dielectric waveguide antenna.

Abstract: Disclosed herein is a dielectric resonator array antenna including one or more series-feed type array elements installed to be arranged in parallel in a multilayer substrate, wherein first high frequency signals having the same or different phases or time delays are adjusted to be applied to the respective series-feed type array elements and respective radiated 1D array beams are individually used or combined to adjust beamforming of 2D array beams. Also, since the series-feed type array element is configured by connecting a plurality of dielectric resonator antennas in series, it can be easily and simply fed in series through coupling generated by the intervals between the feeding lines of the pertinent feeding unit of the plurality of dielectric resonator antennas connected in series. In addition, the broadband characteristics can be obtained by using the plurality of dielectric resonator antennas, whereby the overall antenna performance can be enhanced.

Abstract: There is provided a differential mode amplifier driving circuit, including: a first port having one end connected to a single signal; a second port having one end connected to a differential signal; a first transmission line having one end grounded; and a third port having one end connected to the first transmission line and the other end connected to the differential signal.

Abstract: Disclosed herein is a dielectric waveguide antenna including: a dielectric waveguide transmitting a signal applied from a power feeder; a dielectric waveguide radiator radiating the signal transmitted from the dielectric waveguide to the air through a first aperture; and a matching unit formed in a portion of the dielectric waveguide and controlling a serial reactance and a parallel reactance to thereby perform impedance matching between the dielectric waveguide radiator and the air, in order to reduce reflection generated in the first aperture during the radiation of the signal through the first aperture. Reflection in the aperture is reduced through the matching unit having various structures, thereby making it possible to improve characteristics of the dielectric waveguide antenna.

Abstract: Disclosed herein is a dielectric resonator antenna using a matching substrate in order to improve a bandwidth. The dielectric resonator antenna includes: a dielectric resonator body part that is embedded in a multi-layer substrate and has an opening part on the upper portion thereof; and at least one matching substrate that is stacked on the opening part and includes an an insulating layer having a dielectric constant smaller than that of the multi-layer substrate but larger than that of air, thereby making it possible to improve the bandwidth without adjusting the size of the dielectric resonator body part and to prevent loss and change in the radiation pattern due to the substrate mode.

Abstract: Disclosed herein is a dielectric resonator antenna embedded in a multilayer substrate for enhancing bandwidth. The dielectric resonator antenna includes a multilayer substrate, a first conductive plate, a second conductive plate, a plurality of first metal via holes, a feeding part configured to feed a dielectric resonator, and a conductive pattern part inserted into the dielectric resonator so that a vertical metal interface is formed in the dielectric resonator. Accordingly, the dielectric resonator antenna has low sensitivity to fabrication errors and an external environment, and can enhance the radiation characteristics of the antenna when multiple resonances occur.

Abstract: Disclosed is a dielectric resonator antenna embedded in a multilayer substrate, which includes a multilayer substrate, a first conductor plate having an opening, a second conductor plate formed on the bottom of a lowermost insulating layer resulting from stacking at least two insulating layers downward from the first conductor plate, a plurality of metal via holes passing through around the opening at a predetermined interval, and a feeder for transmitting a frequency signal to the dielectric resonator embedded by the metal boundaries defined by the first conductor plate, the second conductor plate and the plurality of metal via holes, thus exhibiting low sensitivity to fabrication error and the external environment.

Abstract: A line-waveguide converter includes a backside electrode disposed on a first face of a dielectric substrate, a waveguide attached to a second face of the dielectric substrate opposite the first face and having electrical conduction to the backside electrode, and multiple electrodes disposed inside the waveguide on the second face. The electrodes are identical in shape and size, and the intervals between adjoining ones of the electrodes are identical. At least one of the electrodes can be fed with power from a line.

Abstract: An antenna and electronic equipment having the same are disclosed. The antenna comprises: a radiator electrically connected to a feeder, and radiating an electric wave; and one or more reinforcing circuits disposed in the radiator so as to uniformly distribute a current on at least one part of the radiator.

Abstract: A line-waveguide converter includes a backside electrode disposed on a first face of a dielectric substrate, a waveguide attached to a second face of the dielectric substrate opposite the first face and having electrical conduction to the backside electrode, and multiple electrodes disposed inside the waveguide on the second face. The electrodes are identical in shape and size, and the intervals between adjoining ones of the electrodes are identical. At least one of the electrodes can be fed with power from a line.