Proximity-Coupled Graphene-Patch-Based Tunable Single-/Dual-Band Notch Filter for THz Applications

Varshney, Gaurav; Gotra, Shailza; Pandey, V. S.; Yaduvanshi, Rajveer S.

doi:10.1007/s11664-019-07274-8

Cited by 46 publications

(16 citation statements)

References 33 publications

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“…Through the simulation of different bandpass filters with the CST software, the output spectrum in the frequency range of 0.1-1 THz, the transmission coefficient is found to be almost 100%. In higher-frequency ranges, different transmission coefficients have been achieved [14,[24][25][26].…”

Section: Analysis Of the Transmission Coefficientmentioning

confidence: 99%

“…In recent years, the use of metamaterials and frequency selective surfaces (FSS) in the terahertz field has been of great importance, which has also been used for terahertz bandpass filters. These properties as well as the use of different substrates for achieving narrower bandwidth as well as frequency spectrum tunable have been used [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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Design and simulation of a new narrow terahertz bandpass filter

Shahounvand

Fard

2020

SN Appl. Sci.

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Section: Analysis Of the Transmission Coefficientmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design and simulation of a new narrow terahertz bandpass filter

Shahounvand

Fard

2020

SN Appl. Sci.

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“…A DC voltage can be applied on graphene element in reference to the metallic ground structure for the application of bias voltage. 45 The antenna structure is numerically studied and results were obtained using the simulator CST microwave studio. The dimensions of antenna structure have been optimized and mentioned in Table 1.…”

Section: Antenna Designmentioning

confidence: 99%

“…This way of increasing the substrate height helps in keeping the metal layer isolated from graphene. A DC voltage can be applied on graphene element in reference to the metallic ground structure for the application of bias voltage 45 . The antenna structure is numerically studied and results were obtained using the simulator CST microwave studio.…”

Section: Antenna Designmentioning

confidence: 99%

Terahertz ultra-wideband antenna with tunable band-notch creation using resonant/non-resonant graphene loop

et al. 2022

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The state of graphene loop applied in the slotted antenna radiator is converted from non-resonant to resonant to achieve the tunable band-notch characteristics in an ultra-wideband (UWB) antenna. In the non-resonant state, the graphene loop with value of chemical potential as 0 eV acts as a parasitic element and does not contribute to radiation. Increasing the chemical potential of graphene starts converting the state of graphene loop from non-resonant to resonant. The graphene surface starts confining the localized surface plasmons with the increment in chemical potential and hence the multiple higher order resonances are formed. The higher order resonance with the destructive effect provide the band-notch characteristic in UWB response. The variation in chemical potential can tune the created notched band over frequency. Also, conversion of state of graphene loop from non-resonant to resonant deteriorates the far-field radiation parameters and radiation efficiency of antenna drastically. A trade-off can be set to find the required value of gain and radiation efficiency and frequency of the created band notch. Moreover, another technique of utilizing the double graphene loops with less surface area has also been studied, which allows one to attain the higher radiation efficiency of antenna along with the band-notch characteristics.

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“…Their extraordinary properties made the implementation of cloaks 2,3 , invisible carpet 4 and a perfect lens 5 possible. The current research trends are moving in the direction of implementing the terahertz (THZ) devices like antennas 6 , sensors [7][8][9] , filters 10 and absorbers 11 . The purpose of implementing the THz absorbers is enabling the technology in spectroscopy 12 , detection and sensing 13 and many more 14 .…”

Section: Introductionmentioning

confidence: 99%