A Miniaturized-element Frequency Selective Surface (MEFSS) was fabricated based on the coupling mechanism between an inductive surface( metallic meshes)and a capacitive surface(wire patches). On the basis of the theory of the transmission line

the approximation formulas of the capacitance

the inductance were provided and the structural parameters of MEFSS were analyzed qualitatively. By using the vector modal matching method and the transmission characteristics of MEFSS with different geometry parameters and coupling layer electrical parameters were studied in this paper. Twelve lumped inductors and lumped capacitors were properly fabricated on the two side of a PI film by orthogonal arrangement

and the transmission characteristics of a MEFSS with a size of 240 mm240 mm was tested by free space method. Results show that when the center frequency is 14.636 GHz

transmittance is -0.382 dB and the half transmittance bandwidth is 2.17 GHz at a TE 0 incidence. When the unit cell size is shorted

the center frequency drifts and the transmittance is decreased. The unit cell size is 0.125. When the unit cell size is fixed

the center frequency drifts as the increases of inductive widths

capacitance intervals and patch widths. Moreover

if the thickness of the coupling layer is increased by 0.4 mm

the center frequency lowly drifts by 1.4 GHz and transmittance is decreased by 2.6 dB. If the coupling layer relative permittivity is changed from 3.5 to 2

the center frequency highly drifts 2.8 GHz. It concludes that the FSS only with a size of 0.125 fabricated by coupling mechanism between inductive and capacitive surfaces is charaterized by miniaturization

wide pass-band and lower sensitive to the incident angle unit .