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Title: Tunable transmittivity and effective permittivity of a smart surface loaded by varactor diodes
Authors: Liu, L. 
Matitsine, S. 
Issue Date: 19-Jun-2012
Citation: Liu, L., Matitsine, S. (2012-06-19). Tunable transmittivity and effective permittivity of a smart surface loaded by varactor diodes. IET Microwaves, Antennas and Propagation 6 (9) : 1079-1083. ScholarBank@NUS Repository.
Abstract: Smart surface was developed from a thin flexible substrate of a periodic strip array loaded by varactor diodes. The tunable electromagnetic properties, such as transmittivity and effective permittivity, were investigated through free space measurement as well as numerical calculation. It was found that the proposed surfaces show significant tunable characteristics under bias voltage. Transmittivity could be adjusted continuously from -2 to -20 dB at 4 GHz. The phase angle of transmittivity could also be tuned between +40° and -75° by changing bias voltage. Good agreement was found between the measurement and the simulation results. The potential applications of such tunable properties include smart radome or modulation screens of controllable transmission or phase delay. © 2012 The Institution of Engineering and Technology.
Source Title: IET Microwaves, Antennas and Propagation
ISSN: 17518725
DOI: 10.1049/iet-map.2012.0148
Appears in Collections:Staff Publications

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