Ultra-thin tunable microwave absorber using liquid crystals

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22 Citations (Scopus)


A dynamically adaptive radar absorber is described which is based on a periodic array of microstrip patches that are printed on a 500 mu m-thick liquid crystal substrate. The measured reflectivity of the structure is less than -38 dB with a 200 MHz -10 dB bandwidth at 10.19 GHz when a +4 DC bias is applied. It is shown that a 34 dB reduction in signal loss occurs when the bias voltage is increased to 20 V.
Original languageEnglish
Pages (from-to)37-38
Number of pages2
JournalElectronics Letters
Publication statusPublished - Jan 2008


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