Abstract: According to various embodiments of the present invention, an antenna device can comprise: a substrate layer; a source antenna arranged on the substrate layer so as to include a radiating conductor for radiating electromagnetic waves in the direction in which one surface of the substrate layer is oriented; and a planar lens for converting quasi-spherical electromagnetic waves radiated from the source antenna into plane waves. The antenna device can be varied according to embodiments.

Abstract: According to various embodiments of the present invention, an antenna device can comprise: a substrate layer; a source antenna arranged on the substrate layer so as to include a radiating conductor for radiating electromagnetic waves in the direction in which one surface of the substrate layer is oriented; and a planar lens for converting quasi-spherical electromagnetic waves radiated from the source antenna into plane waves. The antenna device can be varied according to embodiments.

Abstract: An unmanned aerial vehicle (UAV) detection method and a system therefor are provided. The UAV detection method includes receiving a radio signal from air, detecting a global positioning system (GPS) leakage signal of a predetermined frequency from the received radio signal, and determining that a UAV is detected when the GPS leakage signal is detected.

Abstract: A biosignal detecting apparatus and a method therefor are provided. The biosignal detecting apparatus includes a signal generator configured to generate a predetermined specific frequency signal, at least two transmit helix antennas configured to transmit circular polarizations according to the specific frequency signal to a subject, a receive helix antenna configured to receive a circular polarization including a biosignal reflected from the subject, a mixer configured to generate an intermediate frequency (IF) signal by mixing the received circular polarization with the specific frequency signal and a detecting unit configured to detect the biosignal of the subject from the IF signal.

Abstract: An unmanned aerial vehicle (UAV) detection method and a system therefor are provided. The UAV detection method includes receiving a radio signal from air, detecting a global positioning system (GPS) leakage signal of a predetermined frequency from the received radio signal, and determining that a UAV is detected when the GPS leakage signal is detected.

Abstract: A K-band frequency modulated continuous wave (FMCW) weather radar system is provided for measuring precipitation in the atmosphere. The apparatus includes a RF transmitter which modulates the input signal of the first baseband unit, this transmitted baseband signal is scattered by the target. A RF receiver receives the signal and demodulates that signal. Further, this demodulated signal goes to mixer and is mixed with local oscillator to generate beat frequency. An IF (intermediate frequency) signal of K-band FMCW radar can be treated as time and frequency domain signals due to a unique property of linear frequency modulation (LFM). Frequency synthesizer generates a reference signal for coherent operation of overall FMCW radar system. The second baseband unit down-converts the beat signal and generates I/Q signal. Finally the signal is converted into digital form utilizing analog-to-digital converter.