Abstract: A beam squint correction method of an active phase array antenna system includes a plurality (m) of beamforming units configured of an antenna, a first amplifier, a phase shifter, a variable attenuator, and a second amplifier, the method comprising the step of adjusting a delay time of an applied RF signal by arranging m/2 true time delays (TTDs) for every two adjacent beamforming units.

Abstract: A frequency conversion beam squint correction method of an active phase array antenna system including a plurality (m) of beamforming units configured of an antenna, a first amplifier, a phase shifter, a variable attenuator, and a second amplifier, the method includes the steps of: adjusting a delay time of an applied RF signal by arranging m/2 true time delays (TTDs) for every two adjacent beamforming units; and converting the frequency of the RF signal by mixing the RF signal transferred to each of the m/2 true time delays and a local oscillation signal using a mixer.

Abstract: The present invention relates to a circuit for controlling waveform distortion resulting from nonlinearity of the impedance of a control terminal (gate or base) capacitance of a transistor, which can be employed in circuits showing a nonlinearity performance of high frequency amplifier or oscillator. According to the circuit of the invention, the waveform distortion can be properly controlled to improve the efficiency of power conversion in a high frequency circuit employing FET, regardless of the frequency band, while assuring a favorable matching of input for the circuit. Also, it can provide the reliability of an integrated circuit by employing outside voltage control circuit. Moreover, it can be fabricated on a wafer substrate of FET circuit with an inexpensive cost, which affords unrestricted designing of the circuit.