Frequency-Selective-Surface-Based Mechanically Reconfigurable Terahertz Bandpass Filter

Lv, Xiaojing; Ako, Rajour Tanyi; Bhaskaran, Madhu; Sriram, Sharath; Withayachumnankul, Withawat

doi:10.1109/tthz.2022.3148816

Cited by 25 publications

(15 citation statements)

References 42 publications

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“…Recently, extensive research has been conducted on integrated circuits and terahertz antennas for remote sensing, imaging, biology, radars, medical applications, and wireless communications [ 5 – 9 ]. Terahertz frequencies that ranging from 0.1 to 10 terahertz are located between the microwave and far-infrared spectrum [ 10 – 12 ].…”

Section: Introductionmentioning

confidence: 99%

On-chip coronavirus shape antenna for wide band applications in terahertz band

Kiani

Rezaei

Fakhr

2023

J Opt

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In this paper, a novel compact planar coronavirus antenna is proposed for wide band applications. In the design of this antenna, the idea of the radiating part has been taken from the 3-D model of the coronavirus, which is fed by a 50 Ω coplanar waveguide. The patch structure and the feed line of the proposed antenna, which have been made of gold, are located on a polyamide substrate with a thickness and dielectric constant of 45 µm and 3.5, respectively, and the antenna has compact physical dimensions of 300 × 300 µm 2 . The simulation results of the antenna have been analyzed in terms of S 11 , VSWR, radiation pattern, gain and surface current distribution. The designed antenna covers the frequency band from 0.3627 to 0.5918 THz for S 11 ≤ − 0 dB with a fractional bandwidth of > 47.98% and with a bandwidth ratio of 1.63:1. This extended bandwidth coverage allows the antenna to be suitable for a wide range of applications including wireless communications, internet of things, wearable devices, on-chip antennas and multiple-input multiple-output systems. Also, the results of the far-field show an omnidirectional radiation pattern with an average gain and efficiency of 4 dBi and 93% throughout the frequency band, respectively.

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Section: Introductionmentioning

confidence: 99%

On-chip coronavirus shape antenna for wide band applications in terahertz band

Kiani

Rezaei

Fakhr

2023

J Opt

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“…On the basis of active control, [ 34–36 ] structure multiplexing, [ 37 ] polarization sensitivity, [ 38–40 ] angle multiplexing, [ 41–43 ] shared‐aperture, [ 44 ] and so on, multifunctional metasurfaces that can accomplish multiple polarization conversions have been proposed. For instance, Wu et al.…”

Section: Introductionmentioning

confidence: 99%

“…On the basis of active control, [34][35][36] structure multiplexing, [37] polarization sensitivity, [38][39][40] angle multiplexing, [41][42][43] sharedaperture, [44] and so on, multifunctional metasurfaces that can accomplish multiple polarization conversions have been proposed. For instance, Wu et al designed a multifunctional wave-plate that could achieve versatile polarization regulation through the separate design of spatial unit structures.…”

Section: Introductionmentioning

confidence: 99%

Modular Design for Versatile Broadband Polarizing Metasurfaces with Freely Switching Functions

Song

Gong

Cao

et al. 2023

Adv Funct Materials

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Polarization is a fundamental property of electromagnetic waves that plays a key role in many physical phenomena and applications. Schemes to manipulate it are revisited with the emergence of metasurfaces, which have brought multi-functionalities straightforwardly. However, this has come at the expense of design complexity that relies strongly on field theory. Here, an ingenious strategy of modular design is proposed to construct subwavelength multifunctional polarization control devices. Chiral metasurfaces with different handedness are first proposed and regarded as modules. The versatile polarization controller can thus be obtained with the combination of different modules. These experiments demonstrate that the well-designed polarization controller possesses reconfigurable functionality, and various broadband polarization and amplitude regulation functions with high efficiency including arbitrary linear polarization rotation, asymmetric transmission effect, neutraldensity-like filter, polarization beam splitter, etc., can be readily realized just by changing the cascaded modules. The physical mechanisms of the versatile polarization controller and chiral metasurface modules are both guaranteed by the Fabry-Pérot-like resonances, which are theoretically verified via the transfer matrix method. It is envisioned that the modular concept will be of great benefit to designing compact multifunctional polarization controllers.

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“…A similar field of application for planar or 3D arrays of resonant elements is in frequency-selective surfaces (FSS). In this case, too, an effort to push the operating frequencies into the terahertz and optical regions of the spectrum can be observed [12,13]. Nevertheless, in the case of FSS, all of the elements of the structures are designed to work on a given unified frequency in order to achieve a common functional frequency response.…”

Section: Introductionmentioning

confidence: 99%

Simulation and Characterization of Nanostructured Electromagnetic Scatterers for Information Encoding

et al. 2022

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Nanostructured scattering arrays for the optical spectral domain can be used as passive tags for information encoding, similarly to the manner in which RFID technology does. Setting up their specific spectral response depends on their geometry and the properties of the building materials. The primary design can be provided by using an analytical calculation procedure that is more straightforward and simpler than a numerical simulation. However, the question arises as to the validity of the results. Both approaches are examined in this article. Complementary scatterer arrays were designed using simplified analytical calculation and by means of numerical modeling. The experimental samples were fabricated by the focused ion beam milling of a gold film on a glass substrate and characterized by a spectroscopic system. The results of the analytical calculations, the numerical simulations, and the experimental measurements were compared. On the basis of the comparison, it was observed that for quick array design, both approaches can be used with satisfactory accuracy. Moreover, the simple numerical model also proved the possibility of the identification of the basic dipole mode splitting. Focused ion beam milling was shown to be suitable for the rapid production of complementary scatterer arrays.

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Frequency-Selective-Surface-Based Mechanically Reconfigurable Terahertz Bandpass Filter

Cited by 25 publications

References 42 publications

On-chip coronavirus shape antenna for wide band applications in terahertz band

On-chip coronavirus shape antenna for wide band applications in terahertz band

Modular Design for Versatile Broadband Polarizing Metasurfaces with Freely Switching Functions

Simulation and Characterization of Nanostructured Electromagnetic Scatterers for Information Encoding

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