A Novel Miniaturized Frequency Selective Surface With Very Stable Performance

Abstract

Abstract-A miniaturized frequency selective surface (MFSS) that has very stable performance is designed based on the stepped-impedance element (SIE) structure. Significant couplings can be introduced by overlapping one metallic layer above the SIE structure. The large overlapping areas between the two metallic layers is beneficial to further miniaturizing the element size. Therefore, the physical size of the MFSS unit cell can be reduced to 0.054λ × 0.054λ. In addition, the MFSS is proved to have excellent stability towards incident angles (up to 75 • ) and polarizations. A careful equivalent circuit model is presented to explain the physical principle of the proposed design. Finally, a prototype is fabricated and tested, and the simulation results are in agreement with the experimental observations.

Improved Performance of Double-T Monopole Antenna for 2.4/5.6 GHZ Dual-Band Wlan Operation Using Artificial Magnetic Conductors

“…As observed from reflection coefficient of the monopole antenna with new AMC structure in Fig. 10, there is another resonance frequency between two mentioned frequencies due to the inductive and capacitive properties of the new added slots [17][18][19]. However, because of the lack of sufficient gain and suitable patterns, this resonance frequency is not very useful.…”

“…However, increasing the overall dimensions of the AMC structure for decreasing the first resonance frequency is not preferred. One method for decreasing the first resonance frequency is adding slot in every side of the metal square plate in order to increase its length [17,18]. First, adding one slot in every side of the square plate is tested and optimized for achieving the desirable result which is stated above.…”

FSS bandwidth design using miniaturized elements for angular stability in transmission

“…Miniaturized elements have also been cascaded to further improve performance and provide excellent centre frequency stability [32,33]. Multiple elements have been used to control bandwidth, where simple loop type elements and their arrangements were explored to create both multi-band and broadband responses [34].…”