Active microwave metamaterials incorporating ideal gain devices

Li Ming Si, Tao Jiang, Kihun Chang, Te Chuan Chen, Xin Lv, Lixin Ran, Hao Xin

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


Incorporation of active devices/media such as transistors for microwave and gain media for optics may be very attractive for enabling desired low loss and broadband metamaterials. Such metamaterials can even have gain which may very well lead to new and exciting physical phenomena. We investigate microwave composite right/left-handed transmission lines (CRLH-TL) incorporating ideal gain devices such as constant negative resistance. With realistic lumped element values, we have shown that the negative phase constant of this kind of transmission lines is maintained (i.e., left-handedness kept) while gain can be obtained (negative attenuation constant of transmission line) simultaneously. Possible implementation and challenging issues of the proposed active CRLH-TL are also discussed.

Original languageEnglish (US)
Pages (from-to)73-83
Number of pages11
Issue number1
StatePublished - 2010


  • Active metamaterial
  • Composite right/left-handed transmission line (CRLH-TL)
  • Dispersion/attenuation relation
  • Negative resistance device

ASJC Scopus subject areas

  • Condensed Matter Physics
  • General Materials Science


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