A NOVEL SHIELD FOR GSM 1800 MHz BAND USING FREQUENCY SELECTIVE SURFACE

Sivasamy, Ramprabhu; Kanagasabai, Malathi; Baisakhiya, Sanjay; Natarajan, Rajesh; Pakkathillam, Jayaram Khizhekke; Palaniswamy, Sandeep Kumar

doi:10.2528/pierl13022206

Cited by 34 publications

(17 citation statements)

References 11 publications

(12 reference statements)

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“…Although adding opening holes may affect the performance of the FSS, they are often required to satisfy the need of ventilation and heat dissipation . Thus, the problem of adding apertures in FSS structures while not influencing their transmission properties is worth studying.…”

Section: Active Fss Design and Numerical Resultsmentioning

confidence: 99%

A novel active frequency selective surface with switching performance for 2.45 GHz WLAN band

Yang

Cao

et al. 2016

Microw. Opt. Technol. Lett.

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filter. Mode separation of the proposed filter is also higher than the mode separation of the ring DR filter and modified ring DR filter along with hump free out-of-band response. So the proposed BPF have superior characteristics over the ring DR filter and modified ring DR filter. A photograph of the fabricated dielectric resonator filter is shown in Figure 5(b). CONCLUSIONA simple method to design a compact planner DR filter was explained. The basic idea consists of using microstrip feed to excite ring DR place on the substrate. Transmission zero is realized in the single DR then a two pole filer is designed. Meanwhile, C shaped slot in the ground plane is used to realize transmission zeros in the upper stop band of the filter. Coupling can be effectively controlled by parallel lines below the DR. The proposed filter shows superior in band response along with spurious free out-of-band response. The proposed band pass filter is suitable for MIC environment. 2. S.B. Cohn, Microwave banpass filters containing high Q dielectric resonators, IEEE Trans Microwave Theory Tech MTT-16 (1968), 218-227. 3. S.J. Fiedziuszko, Dual Mode dielectric loaded cavity filters, IEEE Trans Microwave Theory Tech MTT-309 (1982), 1311-1316. 4. H.W. Wang, K.A. Yao, and R.R. Zaki Mansour, Mixed modes cylindrical planner dielectric resonator filters with rectangular enclosure,

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Section: Active Fss Design and Numerical Resultsmentioning

confidence: 99%

A novel active frequency selective surface with switching performance for 2.45 GHz WLAN band

Yang

Cao

et al. 2016

Microw. Opt. Technol. Lett.

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show abstract

“…The FSS are exhaustively studied in the literature [1] and implemented in many applications, such as shielding [2][3][4][5][6][7][8]. The various geometries that have been used in the unit cell of the FSS were rings of the square and circular shapes [2][3][4][5][6], crosses [7], hexagons [8], and U-shaped slots and strips [9].…”

Section: Introductionmentioning

confidence: 99%

“…The FSS was built on a float-glass to isolate the intensive care rooms of hospitals from mobile phone calls while leaving the Wi-Fi wave to pass through. An FSS for shielding the GSM 1800MHz downlink band was demonstrated in [7] to provide a 20dB bandwidth of 133MHz and showed good angular and polarization performance. The FSS structure had circular slots to meet the requirement of ventilation and heat dissipation.…”

Section: Introductionmentioning

confidence: 99%

A Dual Stopband Frequency Selective Surface for Mobile Shielding Applications

Mayouf¹,

Sayidmarie²,

Ali³

2020

Proceedings of the Proceedings of the 1st International Multi-Disciplinary Conference Theme: Sustainable Development and Smart

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A dual stopband frequency selective surface (FSS) for shielding two bands of the mobile frequencies is proposed. The designed FSS consists of periodic cells of concentric rings to prevent transmission of the two mobile frequencies of EGSM-900 and DCS-1800. The designed FSS is simulated in CST Microwave suit. The equivalent circuit for the two rings is analyzed, and an estimate for the frequency of the transmission in terms of the two stop frequencies is derived. The results show a stable response with various polarization angles. The obtained insertion loss is more than 30 dB across the two bands. This FSS can be used to isolate halls or reduce undesired radiation from nearby mobile base stations.

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“…It is widely used in fields such as satellite communication [2], antenna beam-steering [3], electromagnetic shielding [4], meta-materials integration [5] and radar cross section (RCS) reduction [6][7][8] based on its spatial filter characteristics of electromagnetic (EM) waves such as bandpass or bandstop response. However, performance requirements for FSSs are different according to application environments.…”

Section: Introductionmentioning

confidence: 99%

An Annular-Ring Miniaturized Stopband Frequency Selective Surface With Ultra-Large Angle of Incidence

Zhang¹,

Jiang²,

Ren³

et al. 2018

PIER M

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Abstract-An annular-ring element for building a miniaturized bandstop frequency selective surface (FSS) structure which possesses a superior performance with respect to electromagnetic wave polarizations and incident angles is introduced in this paper. The proposed element has prominent miniaturization characteristics with a unit dimension of 0.061λ × 0.061λ, where λ represents the freespace wavelength corresponding to resonant frequency. Miniaturization of the proposed FSS element is achieved by constructing special meandered strips in geometry and arranging lumped components between the elements. The advantage of this method lies in its great simplicity in tuning the resonant frequency of FSS by adjusting values of the printed capacitors rather than rebuilding the geometry. The obtained FSS also exhibits a stable performance in terms of angle stability and polarization insensitivity. Prototypes of the proposed FSS are fabricated and measured to verify design method. Measurements are well in line with simulation results.

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A NOVEL SHIELD FOR GSM 1800 MHz BAND USING FREQUENCY SELECTIVE SURFACE

Cited by 34 publications

References 11 publications

A novel active frequency selective surface with switching performance for 2.45 GHz WLAN band

A novel active frequency selective surface with switching performance for 2.45 GHz WLAN band

A Dual Stopband Frequency Selective Surface for Mobile Shielding Applications

An Annular-Ring Miniaturized Stopband Frequency Selective Surface With Ultra-Large Angle of Incidence

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