Measurement, Simulation and Mathematical Estimation of Magnetic Field Shielding Effectiveness of Sputtered Shielding Materials using Spiral Coils

An optimization method for conformal shielding

“…In [22], the bulk conductivity of copper was applied to the conformal shielding formed by sputtering technology, which caused differences between the simulation results and the measurement results. The thinfilm conductivity of copper at 0.1-10 MHz was measured in [3]; nevertheless, the measurement results cannot be applied over a wider frequency band.…”

“…A conformal shielding was coated on the top and the sidewall of the DUT. [3,14]. The observation surface was located 2 mm above the models, and the size was set to 20 × 20 mm 2 to entirely capture the electromagnetic field radiated from the microstrip line.…”

“…The primary goal in all conformal shielding design is to improve the SE. While an amount of the existing literature focused on the influence of shielding layer material and shielding layer thickness on SE [2,3,4,5,6,7,8,9,10,11,12]. There were also a number of studies on SE measurement methods in [13,14,15,16,17] and probe calibration in [18,19,20,21].…”

Chips/graphene conductive boards with excellent electromagnetic shielding properties

“…These processes can be classi ed into three types based on their loss mechanisms: (1) re ection shielding (SE R ), (2) absorption shielding (SE A ), and (3) multiple re ection loss (SE M ). According to Schelkunoff's theory [19] , the total electromagnetic shielding e ciency (SE t ) is the sum of the re ection, absorption, and multiple re ection losses. SE M can generally be ignored when SE A is greater than 10 dB.…”