Transmission Line Approach to Calculate the Shielding Effectiveness of an Enclosure With Double-Layer Frequency Selective Surface

2015 ◽  
Vol 57 (6) ◽  
pp. 1736-1739 ◽  
Author(s):  
T. R. SureshKumar ◽  
C. Venkatesh ◽  
P. Salil ◽  
B. Subbarao
Keyword(s):  
Transmission Line ◽  
Double Layer ◽  
Frequency Selective Surface ◽  
Shielding Effectiveness ◽  
Frequency Selective

scholarly journals The simulation of the microwave shielding properties of the dual band pass frequency selective surface

2021 ◽  
Vol 2145 (1) ◽  
pp. 012057
Author(s):  
Asma Samoh ◽  
Ratchapak Chitaree
Keyword(s):  
Normal Incidence ◽  
Frequency Selective Surface ◽  
Microwave Oven ◽  
Dual Band ◽  
Substrate Thickness ◽  
Shielding Effectiveness ◽  
Dielectric Thickness ◽  
Loop Pattern ◽  
Parametric Studies ◽  
Frequency Selective

Abstract Without proper caution, the microwave leakage from a microwave oven door can be harmful to users’ health. In practice, the leaked radiation has to be blocked while the visible light is allowed to pass for a visual inspection of the cooking progress inside the oven. To fulfil the requirements, the door design based on the principle of the frequency selective surface (FSS) was proposed and the gridded square loop pattern was chosen. In the simulation conducted by COMSOL Multiphysics software, the size of the proposed FSS was given as 40.7×40.7 mm with a dielectric thickness of 2.8 mm. Two important characteristics in terms of shielding effectiveness (SE) and optical transparency (OT) of the proposed FSS configuration at normal incidence were simulated and found to be 62.7 dB and 57.5%, respectively. The simulation results indicate that the proposed FSS is applicable to a safety design of a microwave oven door in suppressing the microwave leakage. Parametric studies on the characteristics due to geometrical dimensions and glass substrate thickness were also investigated. These parameters were found to affect the shielding and transmitting performances of the proposed FSS.

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