Journal ArticleDOI
A NOVEL SHIELD FOR GSM 1800 MHz BAND USING FREQUENCY SELECTIVE SURFACE
Ramprabhu Sivasamy,Malathi Kanagasabai,Sanjay Baisakhiya,Rajesh Natarajan,Jayaram Kizhekke Pakkathillam,Sandeep Kumar Palaniswamy +5 more
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TLDR
In this article, the authors proposed a band stop function to shield the GSM 1800MHz downlink band with a unique geometry and the circular apertures endowed with it, which provides shielding efiectiveness of 20dB alongside with 133MHz bandwidth.Abstract:
This paper describes a novel FSS which functions as band stop fllter to shield the GSM 1800MHz downlink band. The FSS is designed to operate with the resonant frequency of 1820MHz which is the centre frequency for the GSM 1800MHz downlink band. The novelty is attributed to its unique geometry and the circular apertures endowed with it. The proposed geometry provides shielding efiectiveness of 20dB alongside with 133MHz bandwidth. The structure holds identical response for both TE and TM Modes of polarization. In addition, the geometry with its circular apertures, a hitherto unexplored feasibility serves the purpose of ventilation and heat dissipation. The simulated results are validated using experimental measurements.read more
Citations
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Journal ArticleDOI
A Single-Layer Frequency-Selective Surface for Ultrawideband Electromagnetic Shielding
TL;DR: In this article, an efficient approach to achieve the shielding effectiveness (SE) by using a frequency-selective surface (FSS) is presented, which consists of cross dipoles and rings printed on the opposite sides of a single-layer FR-4 substrate, exhibits a wide, 7.5GHz stopband to provide simultaneous shielding in both X and Ka-bands.
Journal ArticleDOI
A Low-Profile Paper Substrate-Based Dual-Band FSS for GSM Shielding
Ramprabhu Sivasamy,Lingeshwaran Murugasamy,Malathi Kanagasabai,Esther Florence Sundarsingh,M. Gulam Nabi Alsath +4 more
TL;DR: In this article, a low profile dual-band frequency selective surface (FSS) for shielding the GSM applications is presented, which contains the unit cell made of modified double square loop elements with paper as its substrate.
Journal ArticleDOI
Angularly Stable Frequency Selective Surface With Miniaturized Unit Cell
TL;DR: In this article, a new type of Frequency Selective Surface (FSS) with miniaturized resonator element is proposed, which produces a stable angular response up to 80 degrees for TE and TM incident angles.
Journal ArticleDOI
A glass based dual band frequency selective surface for protecting systems against WLAN signals
TL;DR: In this article, a double layer frequency selective surface on glass substrate is proposed that can transmit 900 MHz and 1.8 GHz GSM bands but inhibit transmission of wireless local area network (WLAN) bands, 2.4-2.5 GHz and 4.98-5.825 GHz.
Journal ArticleDOI
Electromagnetic Nondestructive Material Characterization of Dielectrics Using EBG Based Planar Transmission Line Sensor
Sangeetha Subbaraj,Vimal Samsingh Ramalingam,Malathi Kanagasabai,Esther Florence Sundarsingh,Yogeshwari Paneer Selvam,Saffrine Kingsley +5 more
TL;DR: In this article, a planar microstrip transmission line method has been employed to measure the complex permittivity of the dielectric materials, where the transmission line carrying microwave signals is bridged on both sides by electromagnetic bandgap structures which notches only 2.4 GHz.
References
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Book
Frequency Selective Surfaces: Theory and Design
TL;DR: In this article, the authors present a comparison of band-pass and Dichroic filter designs for one and two-dimensional periodic structures, and present an overview of the current state-of-the-art.
Journal ArticleDOI
Convoluted array elements and reduced size unit cells for frequency-selective surfaces
TL;DR: In this paper, the authors proposed to reduce the unit cell dimension p as much as possible for a given reflection wavelength λ 1, thereby increasing its separation from grating responses.
Journal ArticleDOI
Effective electromagnetic shielding
TL;DR: In this article, a comparison of shielding effectiveness of double-square and ring patches reflecting at 900 and 1,800 MHz is presented, based on the frequency of the electromagnetic wave and the electromagnetic properties of the shielding material.
Proceedings ArticleDOI
New dual-band Frequency Selective Surfaces for GSM frequency shielding
W. Kiermeier,Erwin Biebl +1 more
TL;DR: In this paper, a new element for Frequency Selective Surfaces (FSS), with dual-band stop behavior in the two mobile communication frequency ranges GSM900 and GSM1800, is described.
Journal ArticleDOI
Angular independent frequency selective surfaces for interference control in indoor wireless environments
P.S. Taylor,Andrew C. M. Austin,Edward A. Parker,Michael J. Neve,John C. Batchelor,Jt-P Yiin,Martin Leung,Gerard B. Rowe,A.G. Williamson,Kevin W. Sowerby +9 more
TL;DR: In this article, a simple single-layer annular ring frequency selective surface (which is relatively economic to fabricate) is shown to offer adequate angular stability of the transmission response, and is thus suitable for electromagnetic interference control in indoor wireless environments.
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New dual-band Frequency Selective Surfaces for GSM frequency shielding
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