期刊
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
卷 61, 期 12, 页码 6022-6029出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2013.2280836
关键词
Circuit analog (CA) absorber; double-square-loop (DSL) absorber; microwave absorber; multiple resonances
A detailed study of a single-layer circuit analog absorber using double-square-loop array reveals that three resonances can be obtained within its operating frequency band. An equivalent circuit model is proposed to explain how these three resonances can be produced and its absorption bandwidth can be widened. Simple guidelines for the design of this double-square-loop absorber are then formulated. It is shown through measurements that the fractional bandwidth of 126.8% is realized for at least 10 dB reflectivity reduction under the normal incidence. Furthermore, the total thickness of the proposed design is only 0.088 lambda(L) at the lowest operating frequency. A good agreement between simulated and measured results demonstrates the validity of our design.
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