Open AccessTUNABLE SINGLE-NEGATIVE METAMATERIALS BASED ON MICROSTRIP TRANSMISSION LINE WITH VARACTOR DIODES LOADING
Author(s) -
Tuanhui Feng,
Yunhui Li,
Haitao Jiang,
Wenxin Li,
Fei Yang,
Xinping Dong,
Hong Chen
Publication year - 2011
Publication title -
electromagnetic waves
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 89
eISSN - 1559-8985
pISSN - 1070-4698
DOI - 10.2528/pier11052203
Subject(s) - varicap , metamaterial , transmission line , materials science , optoelectronics , microstrip , diode , pin diode , line (geometry) , metamaterial antenna , capacitance , optics , physics , electrical engineering , microstrip antenna , engineering , electrode , quantum mechanics , antenna (radio) , slot antenna , geometry , mathematics
In this paper, tunable single-negative (TSNG) metamate- rials based on microstrip with varactor diodes loading are investigated. By tuning the external voltage, our structure can provide either an epsilon-negative or a mu-negative band gap, with varying gap width (the ratio of bandwidth to center frequency can be from 0 to over 100%) and depth (from 0dB to about i30dB). Moreover, the tun- neling mode in a heterostructure constructed by epsilon-negative and TSNG metamaterials is also studied. The results show that its trans- mission, Q-factor, and electromagnetic localization can also be con- trolled conveniently. All these properties make our structure promising to be utilized as a practical switching device, or a suitable platform for the study of nonlinear efiect in metamaterials.
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