Dual-Band Frequency Selective Surface With Compact Dimension and Low Frequency Ratio

Abstract

In this paper, frequency selective surface (FSS) with low profile, miniaturized structure and closely located dual-band is proposed based on the fractal technology. The FSS is designed by etching the conductive pattern on a single layer substrate. Two fractal slots are designed to increase the spatial efficiency of the pattern and provide two isolated resonances. For the dual-band FSS, the miniaturization should work for both of the resonances to keep the frequency ratio. Therefore, the slots are convoluted as different principles and twisted with each other to keep the miniaturization and isolation. With the thirdorder fractal pattern, two pass-bands are achieved at 1.04 GHz and 1.49 GHz with the frequency ratio of 1.42. The dimension of the element is as compact as 0.039λ × 0.039λ where λ is the wavelength of low frequency resonance. Moreover, benefiting from the miniaturized element, the angular stability is very good that the resonances keep stable when the incident angle increasing from 0° to 60°. In order to get insight of the mechanism of the proposed element, an equivalent circuit model is established and studied. A prototype is fabricated and all the proposed performances are verified by simulations and measurements.

A dual‐band complementary frequency selective surface combining structures that provides narrow and wide stop‐band frequency responses

“…The measured results show that the bandwidth does not suffer degradation for different incidence angles, confirming the angular stability and polarization independence. Table 1 compares the proposed FSS with other works found in literature, [2][3][4][5][6][14][15][16][17] considering the aspects of a profile, angular stability, polarization independence, and bandwidth of rejection bands. As seen in Table 1, our proposed CFSS has a low profile, angular stability of up to 45°, polarization independence, a narrow band of around 2.56 GHz (210 MHz), and a wide band of around 5.17 GHz (1710 MHz).…”

FSS superstrate antenna for satellite cynosure on IoT to combat COVID-19 pandemic

“…It was investigated and presented in [ 32 ] how band-pass FSS with an array of nanoscale slotted antenna elements perform on the beam switching application for pulsed, high power microwave. Radio astronomy was investigated by [ 33 ] with the Jerusalem cross array to meet the desired results. Complementing and getting microwave lenses to perform better using band-pass FSS is a phase shifter used in [ 34 ] and has a satisfactory target.…”

“…The reflective transmission assets of these materials can be used in improving the enactment of a conventional antenna. The application of FSS structure as a superstrate in modifying the antenna's performance is becoming trending and has been explored by many researchers [ [16] , [17] , [18] , [19] , [20] , [21] , [22] , [23] , [24] , [25] , [26] , [27] , [28] , [29] , [30] , [31] , [32] , [33] , [34] , [35] , [36] , [37] , [38] , [39] , [40] , [41] , [42] , [43] , [44] , [45] , [46] , [47] , [48] , [49] , [50] , [51] , [52] ].…”

A New Ultraminiaturized Low-profile and Stable FSS with 2.5D Structure for 900 MHz ISM Band

“…The 2.5D (2.5 dimensions) FSS structures have been analyzed and shown to be able to miniaturize the array element dimensions. These FSS structures are composed of two or more layers interconnected by metallic vias throughout the dielectric layers, composing the so called 2.5D structure [8]- [11]. Also, it has been emphasized that these structures provide miniaturization of the array elements with little decrease in the relative bandwidth and without the appearance of new resonance bands [12]- [14].…”