Design of a Compact Passband Frequency Selective Surface with Stable Resonance

We propose a compact planar passband frequency selective surface (FSS) operating at the resonance frequency of 3.81 GHz. The proposed FSS is composed of single layer of the Archimedean spiral type with the interdigital capacitance between the corners of metallic patches printed on one side of the substrate. Compared to the operating wavelength, the size of the proposed single layer FSS is 0.066λ0 (λ0 is the free space wavelength at 3.81 GHz). The performance such as transmission and reflection coefficient of the proposed FSS demonstrates excellent resonance stability for different polarization and different incident angles. Finally, the optimized simulated results are validated with measured results by a fabricated prototype of 31×31 array elements on 170×170 mm2 substrate area.

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Novel Dual-Band Miniaturized Frequency Selective Surface based on Fractal Structures

Frequenz ◽

10.1515/freq-2016-0010 ◽

2017 ◽

Vol 71 (1-2) ◽

pp. 57-63 ◽

Cited By ~ 1

Author(s):

Tao Zhong ◽

Hou Zhang ◽

Rui Wu ◽

Xueliang Min

Keyword(s):

Resonant Frequency ◽

Free Space ◽

Single Layer ◽

Frequency Selective Surface ◽

Anechoic Chamber ◽

Dual Band ◽

Fractal Structures ◽

Frequency Selective ◽

Good Agreement

Abstract A novel single-layer dual-band miniaturized frequency selective surface (FSS) based on fractal structures is proposed and analyzed in this paper. A prototype with enough dimensions is fabricated and measured in anechoic chamber, and the measured results provide good agreement with the simulated. The simulations and measurements indicate that the dual-band FSS with bandstop selectivity center at 3.95 GHz and 7.10 GHz, and the whole dimension of the proposed FSS cell is only 7×7 mm2, amount to 0.092λ0×0.092λ0, that λ0 is free space wavelength at first resonant frequency. In addition, the center frequencies have scarcely any changes for different polarizations and incidences. What’s more, dual-band mechanism is analyzed clearly and it provides a new way to design novel miniaturized FSS structures.

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Polarization-independent single-layer ultra-wideband frequency-selective surface

International Journal of Microwave and Wireless Technologies ◽

10.1017/s1759078715001439 ◽

2015 ◽

Vol 9 (1) ◽

pp. 93-97 ◽

Cited By ~ 8

Author(s):

Ramprabhu Sivasamy ◽

Balaji Moorthy ◽

Malathi Kanagasabai ◽

Jithila V. George ◽

Livya Lawrance ◽

...

Keyword(s):

Free Space ◽

Single Layer ◽

Normal Incidence ◽

Frequency Selective Surface ◽

Unit Cell ◽

Ultra Wideband ◽

Attenuation Level ◽

Wide Range ◽

Frequency Selective ◽

Polarization Independent

An ultra-wideband (UWB) frequency-selective surface (FSS) exhibiting band rejection characteristic is presented in this paper. The proposed unit cell has the size of 14 × 14 mm2 which is approximately 0.18 × 0.18 λo, where λo corresponds to free space wavelength at the lower cut-off frequency. The proposed UWB FSS consists of a single-layer substrate and provides 20 dB attenuation level for a wide bandwidth of 7.53 GHz at the normal incidence. The proposed FSS is polarization independent and also provides angular-independent operation for the EM wave incidences of 15°, 30° and 45° with 11.5 dB attenuation over a wide range from 4 to 14 GHz.

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