Abstract: An antenna apparatus includes: a parabolic reflector; a dielectric support pedestal; a sub-reflector connected to an upper part of the dielectric support pedestal; and a waveguide connected to a lower part of the dielectric support pedestal, wherein the parabolic reflector has a curved surface in which a ratio of a focal length to a diameter is greater than a preset value, and at least one corrugation configured to suppress a cross polarization is formed in a region of the dielectric support pedestal.

Abstract: A method of manufacturing a full-color holographic optical element in a full-color holographic optical element manufacturing apparatus including a lens and a holographic recording medium located farther away than a focal length of the lens, the method including: allowing a signal beam including a mixture of laser beams having wavelengths of R (Red), G (Green), and B (Blue) to be incident on the lens; and recording a hologram in such a manner that a reference beam including a mixture of laser beams having wavelengths of R, G, and B is allowed to be incident on the holographic recording medium, wherein the holographic recording medium is configured with a single medium.

Abstract: Provided is a method of manufacturing a full-color holographic optical element in a full-color holographic optical element manufacturing apparatus including a lens and a holographic recording medium located farther away than a focal length of the lens, the method including: allowing a signal beam including a mixture of laser beams having wavelengths of R (Red), G (Green), and B (Blue) to be incident on the lens; and recording a hologram in such a manner that a reference beam including a mixture of laser beams having wavelengths of R, G, and B is allowed to be incident on the holographic recording medium, wherein the holographic recording medium is configured with a single medium.

Abstract: A telemetric system for fetal health, which receives data of a pregnant woman or a fetus of the pregnant woman, analyzes the received data and reporting a diagnosis result in order to make a diagnosis of fetal health without the pregnant woman calling on a hospital. The telemetric system for fetal care including a telemetric server for providing first analysis data by analyzing data a data offering client terminal having a data input unit on a communications network, a data diagnosis client receiving the source data from the telemetric server and generating a second analysis data or a final diagnosis result, the telemetric server receiving the second analysis data or the final diagnosis result form the data diagnosis client and transmitting the second analysis data or the final diagnosis result to a result report unit and a Web server managing unit for informing and displaying the second analysis data or the final diagnosis result.