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위상 배열 안테나 빔 오차 개선을 위한 반도체송수신모듈 크기/위상 보정 알고리즘 설계
최선열(Sun-Youl Choi),이복형(Bok-Hyung Lee),최영조(Young-Joe Choe) 한국정보기술학회 2022 한국정보기술학회논문지 Vol.20 No.5
In multi function radar systems, Transmit/receive module provides amplifying transmit rf signal and receive low noise rf signal, phase shifting, amplitude attenuation, etc. In this paper, among the functions amplitude/phase correction algorithm is described with the process of generating control data to correct amplitude/phase for antenna unit. A MFC(Multi Function Chip) used for phase shifting and amplitude attenuation has 0.5dB(1lsb) attenuation resolution, 5.625°(1lsb) phase shifting resolution. Also, attenuation can be controlled to 31.5dB and phase shifting can be controlled to 360°. But the mfc doesn’t have an accurate 1lsb characterization because of parasitic effect. In this paper correction algorithm will be discussed. With the correction algorithm, It can be corrected to 1lsb. Before the correction algorithm, the mfc error had 3dB/16°. After the correction, An error was measured less than 0.8dB/4°.