1 These test methods are under the jurisdiction of ASTM Committee D-9 on Electrical and Electronic Insulating Materials and are the direct responsibility of Subcommittee D09.12 on Electrical Tests. Current edition approved Feb. 10, 1998. Published March 1999. Originally published as D 150 - 22 T. Last previous edition D 150 - 95. According to the ASTM D 4935-99 standard [10], an electrically thin material must have a thickness, t m, less than 0.01 times the electrical wavelength, λ, of the signal transmit- ted through the specimen being tested. The electrical wave- length is the speed of light divided by the frequency of the signal. Most recent ASTM D4935-18 Standard Test Method for Measuring the Electromagnetic Shielding Effectiveness of Planar Materials 1.1 This test method provides a procedure for measuring the electromagnetic (EM) shielding effectiveness (SE) of a planar material for a plane, far-field EM wave. of an EMI shielding effectiveness (SE) tester based on the ASTM D4935 standard, to be used in the development of such materials. EM wave simulations and computer aided design were used in parallel to improve the SE test setup performance, which resulted in a unique low-loss coaxial spherical conical fied in ASTM D4935-10 was used to test the EMSE of the woven fabrics. The specimen was prepared with a standard test size of various thicknesses. The outer ring of the sam-ple was 133mm in diameter. Two pieces were required to be produced for the test, one for reference and another for setup and testing procedure using a plane-wave electro- The ASTM D4935-10 standard covers a frequency range from 30 MHz to 1.5 GHz however various work [16], [17], [18], and [19], have used with more or less success a modified version of this method to The ASTM D 4935-10 standard involves the measurement of shielding effectiveness of planar material (square) for plane far-field Electromagnetic waves. The samples under test must be electrically thin for a near field magnetic field (H) calculation. DOI: 10.1520/D0257-07. 2 For referenced ASTM standards, visit the ASTM website, astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards volume information, refer to the standard's Document Summary page on the ASTM website. 1 ASTM D4935-10 Standard Test Method for Measuring the Electromagnetic Shielding Effectiveness of Planar Materials 1.1 This test method provides a procedure for measuring the electromagnetic (EM) shielding effectiveness (SE) of a planar material for a plane, far-field EM wave. ASTM D4935-10 Standard Test Method for Measuring the Electromagnetic Shielding Effectiveness of Planar Materials. standard by ASTM International, 05/01/2010. This document has been replaced. View the most recent version. View all product details PDF Immediate download ASTM D4935-10. May 1, 2010 Standard Test Method for Measuring the Electromagnetic Shielding Effectiveness of Planar Materials 1.1 This test method provides a procedure for measuring the electromagnetic (EM) shielding effectiveness (SE) of a planar material for a plane, far-field EM wave. From the measured data, near-field DESIgn COnSIDErATIOnS 10 PrOCESSIng gUIDElInES 12 rEgUlATOry COMPlIAnCE 14 ShIElDIng EFFECTIvEnESS TEST METhODS 16 COMMITTED TO SUSTAInABIlITy 18 (SE) measured at 3 mm thickness, acc. ASTM D4935. LNP F aradex com P ou N ds as002 as004 as003 ds0036I ds0036Ir ds0036IP Ns003 Ns0031 Nx07344 ms003 usF63 ABS, hB1), SE 45dB2) ABS, hB, SE 60dB ABS DESIgn COnSIDErATIOnS 10 PrOCESSIng gUIDElInES 12 rEgUlATOry CO