Comparison of FSS Topologies for Maximising the Bandwidth of Ultra-Thin Microwave Absorbers

G. Goncalves Machado, R. Cahill, V. Fusco, G. Conway

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)
271 Downloads (Pure)


The maximum obtainable reflectivity bandwidth is compared for circuit analogue absorbers patterned with two different types of frequency selective surface (FSS). Metal backed resistively loaded FSS designs with thickness in the range of λ/18 to λ/14, were investigated to identify the crossover point below which the bandwidth of structures patterned with nested loops is narrower than a much simpler arrangement consisting of an array of patch elements. The results show that the deployment of a multi-resonant loop FSS, which are widely used to enhance the bandwidth of this class of microwave absorber, is undesirable below a threshold thickness where it is impossible to merge the individual absorption bands resulting from the nested loops. Numerical simulations are compared with radar backscatter measurements that were performed at normal incidence over the frequency range 7-14 GHz.
Original languageEnglish
Title of host publication13th European Conference on Antennas and Propagation: Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages5
ISBN (Electronic)978-88-907018-8-7
Publication statusPublished - 20 Jun 2019
Event13th European Conference on Antennas and Propagation - Krakow, Poland
Duration: 31 Mar 201905 Apr 2019
Conference number: 13th


Conference13th European Conference on Antennas and Propagation
Abbreviated titleEuCAP 2019
Internet address


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