Pyramidal Microwave Absorber Design for Anechoic Chamber in the Microwave Frequency Range of 1GHz to 10GHz

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  •   Stella Ifeoma Orakwue

  •   Igochi Praise Onu

Abstract

The design of microwave absorbers is directly correlated to the general performance of an anechoic chamber for its signal absorptive capabilities. However, the cost of importing the total required microwave absorber for the 5m × 4m × 3m proposed anechoic chamber in the University of Port Harcourt Nigeria is at the tune of twenty-seven thousand dollars. This research is carried out to simulate and fabricate the microwave absorber using polyurethane material and locally obtained carbon in order to reduce cost. The simulation is done using Computer Simulation Technology (CST) software for the desired frequency range of 1GHz to 10GHz. Simulation results proved to have good absorptive performance and reflectivity loss comparable to that of the conventional microwave absorber. The reflectivity performance is below -30dB across the desired frequency range. With the polyurethane material and locally obtained conducting carbon the estimated cost is five thousand five hundred dollars against the twenty-seven thousand dollars importation cost; thereby reducing the cost by more than 60%.


Keywords: Pyramid Microwave Absorbers, Polyurethane, Carbon, Reflectivity

References

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TDKTM Absorbers Catalog, e9e bdj 003.pdf. Available at: http://www.tdkrfsolutions.com/literature.htm.

TDK RF Solution Inc., “Absorber for Microwave and Millimeter Wave Test Chamber”, 2008.

H. Nornikman, P. J. Soh, A. A. H. Azremi, M. R. N. Husna and O. S. Liam, “Parametric Study of Pyramidal Microwave Absorber Design”, International Symposium on Antennas and Propagation (ISAP 2008) Taipei. Taiwan, 2008. Available at: http://ap-s.ei.tuat.ac.jp/isapx/2008/pdf/1645388.pdf.

H. Nornikman, P. J. Soh and A. A. H. Azremi, “Potential Types of Biomaterial Absorber for Microwave Signal Absorption”, Conference paper, January 2008.

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How to Cite
[1]
Orakwue, S. and Onu, I. 2019. Pyramidal Microwave Absorber Design for Anechoic Chamber in the Microwave Frequency Range of 1GHz to 10GHz. European Journal of Engineering Research and Science. 4, 10 (Oct. 2019), 1-3. DOI:https://doi.org/10.24018/ejers.2019.4.10.1409.