Journal
APPLIED SCIENCES-BASEL
Volume 13, Issue 7, Pages -Publisher
MDPI
DOI: 10.3390/app13074379
Keywords
mutual complementary configuration; single-layer antenna; shared-aperture antennas; array antennas
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This paper proposes an S/X-band single-layer shared-aperture array antenna for the multifunction radars of military ships. The proposed antenna consists of one S-band element and four X-band elements. The antenna is designed in a symmetrical structure, which can be flexibly extended to a full array configuration. Antenna performances are measured in a full anechoic chamber to verify feasibility, and the results show promising bandwidths and array gain.
This paper proposes an S/X-band single-layer shared-aperture array antenna for the multifunction radars of military ships. A unit cell of the proposed antenna consists of one S-band element and four X-band elements. The S- and X-band elements are printed on the same layer to prevent a blockage effect by upper elements in the stacked shared-aperture antenna. Herein, the S-band element has a mutual complementary configuration for the X-band elements. In addition, the unit cell of the proposed antenna is designed in a symmetrical structure, which can be flexibly extended to a full array configuration. To verify the antenna feasibility, antenna performances are measured in a full anechoic chamber. The fractional bandwidths of the S- and X-band elements are 13.6% and 13.4%, respectively. Moreover, in the 2 x 2 array configuration, the S-band array gain in the bore-sight direction varies from 5.4 dBi to 3.5 dBi when the main beam is steered from 0 degrees to 45 degrees. Under the same conditions, the measured X-band array gain in the bore-sight direction decreases from 13.4 dBi to 11.6 dBi.
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