Ultra Wideband Frequency Selective Surface for Use in Applications Involving the Microwave Band
AbstractThe design and modeling of an ultra-wideband (UWB) frequency-selective band-stop surface (FSS) with angular and polarization stability is shown in this abstract. The unit cell that was created has two different types of elements: one is a square loop, and the other is a crossed dipole with a circular groove. The new unit cell size has been reduced to 0.047 angstroms by 0.047 angstroms, where angstroms are the free-space wavelength corresponding to the lowest frequency in the UWB band. The proposed FSS has a bandwidth of -3 dB that ranges from 3.05 GHz to 10.73 GHz, which encompasses the whole of the UWB spectrum as specified by the FCC. The suggested FSS has high angular stability up to incidence angles of sixty degrees with both perpendicular (TE) and parallel (TM) polarization. This is made possible by the small size of the unit cell. The greatest amount that the resonance frequency may deviate for TE polarization is 1.75%. In addition to that, the FSS that has been presented has an outstandingly steady resonant frequency. It is decided to build the FSS design, and then experimental measurements are carried out. The findings of the numerical simulations and the measurements are quite consistent with one another.
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