Effects of the parameteristics of Y loop element on the frequency response characteristics of frequency selective surface (FSS) were studied by spectral domain method

especially in the thickness and permittivity of the loading dielectric. With filming technology and lithography

the corresponding FSS was produced. And the tests of it in the microwave darkroom were given. The agreement between the calculated and measured is good. The results show that

the arm length mainly influences the center frequency

which increases from 3.8 mm to 4.7 mm

the center frequency decreases from 11.9 GHz to 8.9 GHz. The space between the elements mainly influences the bandwidth

which increases from 0.3 wavelength to 0.5 wavelength

the bandwidth decreases from 3.2 GHz to 1.0 GHz. The arm width and the slot width influence the center frequency as well as the bandwidth. The center frequency of FSS decreases along with the dielectric loading

but it does not decrease at all times. The center frequency is influenced by the dielectric thickness and dielectric permittivity

but the latter does much more. The dielectric loading can also influence the transmission power at the center frequency

the appropriate dielectric thickness and dielectric permittivity can stabilize the FSS transmission characteristics as the angle of incidence and the polarization are varied

and it can improve the transmission characteristics of FSS.