一种S频段卫星通信相控阵天线设计

doi:10.3969/j.issn.1001-2400.2018.03.030

Abstract

Abstract:

The phased array antenna for satellite communication has a smaller beam-scanning angel and a lower gain at the low elevation angel at present. A circularly polarized (CP) antenna element with a wide beam-width in the S-band is proposed. To enhance the realized gain at a low elevation angel, this element is adopted with the dual-layer micro-strip structure and loads a circular metal cavity. Based on the element, a phased array antenna composed of 24 antenna units is designed, which has a water-drop form to reduce wind resistance. The simulated results show that over the transmitting and the receiving frequency band, the voltage standing wave ratio (VSWR) of this element is less than 1.3, that the axial ratio (AR) is less than 3dB, and that 3dB beam-width of the element is about 120° in the array; the realized gain of the array is declined about 4dB when the scanning angle is approaching 65°. Later, the measured results of the manufactured array antenna present a good consistency with the simulated results. It possesses a wide scanning angle and a high realized gain at low elevation angel, which satisfies the design requirement.

Key words: satellite communication, phased array, beam scanning, circularly polarized, water-drop form

GUO Chao;ZHAO Chunliu;YAN Zehong;ZHANG Tianling. Design of a satellite communication phased array antenna in the S-band[J].Journal of Xidian University, 2018, 45(3): 175-180.

References

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Design of a satellite communication phased array antenna in the S-band

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