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

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

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 proceeding › Conference contribution

7 Citations (Scopus)

448 Downloads (Pure)

Abstract

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 language	English
Title of host publication	13th European Conference on Antennas and Propagation: Proceedings
Publisher	Institute of Electrical and Electronics Engineers Inc.
Number of pages	5
ISBN (Electronic)	978-88-907018-8-7
Publication status	Published - 20 Jun 2019
Event	13th European Conference on Antennas and Propagation 2019 - Krakow, Poland Duration: 31 Mar 2019 → 05 Apr 2019 https://www.eucap.org/

Conference

Conference	13th European Conference on Antennas and Propagation 2019
Abbreviated title	EuCAP 2019
Country/Territory	Poland
City	Krakow
Period	31/03/2019 → 05/04/2019
Internet address	https://www.eucap.org/

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Comparison of FSS Topologies for Maximising the Bandwidth of Ultra-Thin Microwave Absorbers
© 2019 IEEE. This work is made available online in accordance with the publisher’s policies. Please refer to any applicable terms of use of the publisher.
Accepted author manuscript, 13.4 MBLicence: Unspecified

https://ieeexplore.ieee.org/document/8739822Licence: Unspecified

Stealth technologies based on thin microwave FSS absorbers
Gonçalves Machado, G. (Author), Cahill, R. (Supervisor), Fusco, V. (Supervisor) & Conway, G. (Supervisor), Jul 2021
Student thesis: Doctoral Thesis › Doctor of Philosophy

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@inproceedings{b481a7ca30b04434bf3ab35f96798346,

title = "Comparison of FSS Topologies for Maximising the Bandwidth of Ultra-Thin Microwave Absorbers",

abstract = "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.",

author = "\{Goncalves Machado\}, G. and R. Cahill and V. Fusco and G. Conway",

year = "2019",

month = jun,

day = "20",

language = "English",

booktitle = "13th European Conference on Antennas and Propagation: Proceedings",

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Goncalves Machado, G, Cahill, R , Fusco, V & Conway, G 2019, Comparison of FSS Topologies for Maximising the Bandwidth of Ultra-Thin Microwave Absorbers. in 13th European Conference on Antennas and Propagation: Proceedings. Institute of Electrical and Electronics Engineers Inc., 13th European Conference on Antennas and Propagation 2019, Krakow, Poland, 31/03/2019. <https://ieeexplore.ieee.org/document/8739822>

TY - GEN

T1 - Comparison of FSS Topologies for Maximising the Bandwidth of Ultra-Thin Microwave Absorbers

AU - Goncalves Machado, G.

AU - Cahill, R.

AU - Fusco, V.

AU - Conway, G.

PY - 2019/6/20

Y1 - 2019/6/20

N2 - 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.

AB - 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.

M3 - Conference contribution

BT - 13th European Conference on Antennas and Propagation: Proceedings

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 13th European Conference on Antennas and Propagation 2019

Y2 - 31 March 2019 through 5 April 2019

ER -

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

Abstract

Conference

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Student theses

Stealth technologies based on thin microwave FSS absorbers

Cite this