Title :
A single-layer tuneable microwave absorber using an active FSS
Author :
Tennant, A. ; Chambers, B.
Author_Institution :
Dept. of Electron. & Electr. Eng., Univ. of Sheffield, UK
Abstract :
An experimental single-layer active microwave absorber in described. The absorber is a planar structure based upon the topology of a Salisbury screen, but in which the conventional resistive layer is replaced by an active frequency selective surface (FSS) controlled by pin diodes. The resulting structure has superior reflectivity-bandwidth characteristics compared to conventional passive absorbers of corresponding thickness. Measured data are presented and show that the reflectivity response of the absorber can be controlled over the frequency band from 9 to 13 GHz.
Keywords :
electromagnetic wave absorption; frequency selective surfaces; microwave materials; tuning; 9 to 13 GHz; Salisbury screen; active FSS; active frequency selective surface; frequency band; passive absorbers; pin diodes; reflectivity-bandwidth; resistive layer; single-layer tuneable microwave absorber; Current measurement; Diodes; Frequency dependence; Frequency measurement; Frequency selective surfaces; Impedance; Reflectivity; Resonant frequency; Topology; Tunable circuits and devices;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2003.820639
