期刊
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
卷 57, 期 3, 页码 682-687出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2009.2013429
关键词
Array antennas; artificial magnetic conductors; Fabry-Perot cavity; high-gain antennas
资金
- U.K. Engineering and Physical Sciences Research Council (EPSRC) [EP/C510607/1]
- Engineering and Physical Sciences Research Council [EP/C510607/1] Funding Source: researchfish
A new method is presented for increasing the separation between the radiating elements of a I-D array antenna by incorporating it into a Fabry-Perot type resonant cavity with artificial magnetic conductor (AMC) walls. The AMC walls create a more uniform distribution of field within the cavity and, moreover, eliminate diffracted fields. The concept is demonstrated via 3-D full-wave simulations as well as experimental measurements for a prototype antenna. Comparison between an antenna with AMC walls and an identical reference antenna, without walls, shows a reduction in the sidelobe level. An array element separation of 2 A is achieved whilst maintaining good radiation performance. The performance of the proposed structure is also compared to that of an antenna incorporating PEC walls. Finally, the effect of the side-wall and central AMC walls are considered separately in order to isolate their corresponding effect on the antenna performance.
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