A Flower Shaped Frequency Selective Surface for WLAN Screening Applications

This communication presents a single flower shaped resonator frequency selective surface (FSS) unit cell with stable oblique angles of incidence for both horizontal and vertical polarizations. The proposed FSS structure which can impede the frequencies from 3GHz to 6GHz at 3dB insertion loss is presented. The proposed FSS comprise an improved decagon to form a flower-shaped structure that exhibits single narrow stop band characteristics. The flower shaped FSS acts like a band-stop filter with center frequency of 4.8 GHz and notch band frequency ranging from 4.2GHz to 5.3GHz at 10dB insertion loss and 320MHz bandwidth at 20dB insertion loss. The designed FSS can use for shielding of public safety WLAN frequency. We present the equivalent circuit model and the surface current distribution to illustrate the resonance characteristics of the miniaturized FSS. To validate the design and simulation results, the proposed FSS is fabricated and tested in a semi-anechoic chamber

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Miniaturized frequency selective surface with high angular stability

Frequenz ◽

10.1515/freq-2021-0116 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Zain Ul Abidin ◽

Qunsheng Cao ◽

Gulab Shah ◽

Zaheer Ahmed Dayo ◽

Muhammad Ejaz

Keyword(s):

Resonant Frequency ◽

Electric Field Distribution ◽

Equivalent Circuit Model ◽

Surface Current ◽

Frequency Selective Surface ◽

Angular Stability ◽

Working Mechanism ◽

Low Profile ◽

Simple Geometry ◽

Frequency Selective

Abstract In this paper, a miniaturized bandstop frequency selective surface (FSS) with high angular stability is presented. Each FSS element consists of four sets each consisting eight octagonal concentric interconnected loops. The four sets are connected with each other through outermost octagonal loop. The unit size is miniaturized to 0.066 λ0 at the resonant frequency of 1.79 GHz. The proposed configuration achieves excellent angular stability (only 0.025 GHz resonant frequency deviation is observed upto 83° oblique angles). The working mechanism of FSS is explained with the help of equivalent circuit model (ECM), electric field distribution, and corresponding surface current distribution. A prototype of the designed bandstop FSS is fabricated to verify the simulated frequency response. The experimental results are consistent with the simulation results. Simple geometry, low profile, high angular stability, and compact cell size are prominent features of the proposed structure.

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Dual stop band frequency selective surface for C and WLAN band applications

AEU - International Journal of Electronics and Communications ◽

10.1016/j.aeue.2018.10.016 ◽

2018 ◽

Vol 97 ◽

pp. 267-272 ◽

Cited By ~ 2

Author(s):

Payal Jindal ◽

Ajay Yadav ◽

Sudhir Kumar Sharma

Keyword(s):

Stop Band ◽

Frequency Selective Surface ◽

Band Frequency ◽

Frequency Selective

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Design and analysis of a tri-band frequency selective surface with a second-order response

International Journal of Microwave and Wireless Technologies ◽

10.1017/s175907871900117x ◽

2019 ◽

Vol 12 (3) ◽

pp. 205-211

Author(s):

Chunyan Gao ◽

Hongbin Pu ◽

Shan Gao ◽

Chunlan Chen ◽

Yong Yang

Keyword(s):

Satellite Communication ◽

Equivalent Circuit Model ◽

Design Procedure ◽

Frequency Selective Surface ◽

Flat Band ◽

Pass Band ◽

Band Frequency ◽

Transmission Zeros ◽

Frequency Selective ◽

Sharp Rejection

AbstractIn this paper, a sandwiched type frequency selective surface (FSS) is designed and analyzed. The design procedure and operating principle is given based on the equivalent circuit model. The proposed FSS includes two identical layers of periodic metallic arrays, which are separated by a foam layer. In each layer of the periodic array, the unit cell is composed of a gridded-triple square loop structure. The FSS provides three pass-bands, in which a flat band response is presented. Three bands are separated by one or two transmission zeros, which leads to a sharp rejection on both sides of each pass-band. The central frequencies of the three pass-bands are 7.0, 10.9 and 14.0 GHz. To verify the simulated results, a prototype of the FSS is fabricated and measured. The simulated results agree well with the measured ones. This work can be used in area of a radar stealth or satellite communication system.

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