DocumentCode
1023234
Title
Ultra-thin tunable microwave absorber using liquid crystals
Author
Fusco, V.F. ; Cahill, R. ; Hu, W. ; Simms, S.
Author_Institution
Queen´´s Univ. Belfast, Belfast
Volume
44
Issue
1
fYear
2008
Firstpage
37
Lastpage
38
Abstract
A dynamically adaptive radar absorber is described which is based on a periodic array of microstrip patches that are printed on a 500 mum-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.
Keywords
adaptive radar; electromagnetic wave absorption; liquid crystals; microstrip antenna arrays; microwave materials; adaptive radar absorber; bias voltage; liquid crystal substrate; liquid crystals; microstrip patches; periodic array; signal loss; ultra-thin tunable microwave absorber;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:20082191
Filename
4415016
Link To Document