关键词: 相控阵天线, 印刷振子, 波束赋形, 泰勒分布, 虚位技术

Abstract: A phased array antenna, which scans in the elevation plane with the shaped pattern in the azimuth plane, is analyzed and designed. The printed dipole is used as radiating elements. The fed current distribution in the scan plane adopts the Taylor amplitude illumination function in order to obtain a low sidelobe lever. The technology of virtual displacement with 4bit digital phase shifters instead of 9bit is used to satisfy the smallest steering increment of 0.2°, which simplifies facilities and lowers the cost. It is proved by reliable tests that within the scanning range of ±15°, the half power beamwidth is less than 2.3°, that the gain is higher than 25dB, that the sidelobe lever is lower than -25dB, and that the shaped beam width is 33°, which perfectly satisfs the requirements.

Key words: phased array antennas, printed dipole, shaped pattern, Taylor amplitude illumination function, the technology of virtual displacement