期刊
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
卷 63, 期 11, 页码 4827-4834出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2015.2476468
关键词
Antenna blockage; cloaking; metasurface; miniaturized element frequency selective surface (MEFSS); RCS reduction
资金
- NSF CAREER Award [ECCS-0953311]
- AFOSR YIP [FA9550-11-1-0009]
- DTRA YIP [HDTRA1-12-1-0022]
We theoretically and experimentally explore the use of mantle covers to cloak dipole antennas and reduce their blockage on nearby antennas. The proposed structures allow reducing the observability in a given frequency range and overall scattering of conventional dipole antennas operating in a different frequency band, ideally suited to reduce the mutual influence among antennas placed in close proximity to each other. We prove this concept in the case of a low-band (LB) dipole antenna placed in close proximity to a high-band dipole antenna, and study several thin cover designs that are shown to be effective in reducing the LB blockage, without disrupting the performance of both antennas in terms of radiation pattern and impedance matching. An optimized cover is proposed to strongly reduce the interference and shadowing over a large bandwidth targeted for one polarization, and we also experimentally demonstrate the operation of dual-polarized covers for near-field horn and log-periodic antenna excitation.
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