Sudipta Das

IMPS college of Engineering and Technology · Electronics & Communication Engineering

The main purpose of this letter is to develop a miniaturized ultra‐wideband hybrid coupler with an adjustable phase shift (90°‐180° and vice versa) that operates around the resonant frequency of 3.8 GHz with a fractional bandwidth of 26% required for 5G applications. The design approach is based on a microstrip waveguide technique with localized lu...

In this paper, a compact micro-sized rhombus-shaped wideband THz antenna is proposed. The radiating patch has been modified by incorporating a rhombus-shaped gold metal-based element within the inscribed square-shaped slot on the surface of the patch. The proposed monopole antenna is designed on a 45-μm-thick polyimide substrate material having a d...

A low cost dual band offset fed monopole microstrip antenna is proposed in this paper. The suggested antenna is designed using an inexpensive 1.6 mm thick fr-4 substrate of relative permittivity 4.4. The design and analysis of the proposed antenna model have been performed using HFSS software. By inserting a square slot loaded with an inverted meta...

This book highlights the growing applications of THz technology and various modules used for their successful realization. The enormous advantages of THz devices like higher resolution, spatial directivity, high-speed communication, greater bandwidth, non-ionizing signal nature and compactness make them useful in various applications like communica...

Design of an integrated ultra wide-band and narrow-band three-antenna structure for cognitive radio communication in 5G, WLAN, LTE and ITU bands is reported. This structure constitutes of an ultra wide-band antenna to monitor the radio spectrum and two narrow-band antennas performing communication. The UWB and narrow-band antennas are stamped on an...

This article presents the design of a metamaterials-based hybrid wideband bandpass filter (WB-BPF) supporting several advanced communication applications. The suggested filter uses multiple-mode resonators (MMRs) and metamaterial complementary split-ring resonators (CSRRs). Coupling frequencies are optimized by stretching the coupled lines parallel...

In this article, a MIMO antenna system featuring wide bandwidth, high gain, and circular polarization for 5G communication networks is presented. The proposed antenna enabled high data rates, enhanced signal reliability, and improved performance in dynamic and challenging 5G environments. Wide bandwidth ensures compatibility with various 5G frequen...

A compact eight‐port MIMO structure containing planar inverted‐F antennas (PIFAs) as radiating elements is designed for 5G cellular communication applications within the sub‐6 GHz band. The proposed antenna consists of four radiating elements that are placed at four corners on the same plane of geometry. The overall dimension of the ground plane is...

A broadband metamaterial-based absorber (MTMA) with a broad absorptance response is proposed in this research article, which contains a straightforward structure with three layers namely lossy silicon functioning as a dielectric medium, copper as a bottom conductive layer, and finally graphene-based top layer as a radiating patch. The geometry of t...

This research work represents a comparative study of the regular n-i-p heterojunction structure ofCs2TiBr6 single halide Perovskite solar cells (PSCs) using the SCAPS-1D software framework under ambient conditions.We have studied the performance optimization of different hole transfer layers (HTLs)P3HT, CuO, Cu2O, and MoO3 respectivelyfollowed by o...

This article presents a polarization-insensitive quad-band microwave metamaterial absorber for sensing and wireless communication applications. This absorber is characterized by a high effective medium ratio (EMR) of 9.76 and provides maximum absorption of 98.49, 95.94, 94.00, and 99.88 % at 3.84, 7.41, 10.56, and 15.66 GHz, respectively. The prope...

Exploring semiconductor materials with enhanced photocatalytic activity is essential for practical applications. This review provides a comprehensive overview of the photocatalytic reaction mechanisms. The discussion highlights recent progress in perovskite oxide materials for various environmental and energy applications, including H2/O2 productio...

This study presents a low-profile, dual-band microstrip patch antenna (MPA) optimized for wearable applications, with a focus on achieving a low specific absorption rate (SAR). The antenna operates efficiently in the 5.8 GHz ISM (industrial, sci-entific, and medical) band and the 8.3 GHz X-band. A strategically designed C-shaped slot adjusts the re...

This research work represents a comparative study of the structural, optical, and electronic properties of Cs2TiX6 single halide perovskite solar cell (PSC). The entire work has been carried out by experimental work under ambient conditions and followed by the DFT method. Absorbing material structural parameters (lattice constant, shape), and band...

A graphene-based 1×2 array antenna with circular polarization for terahertz applications is prescribed in this article. Initially, a novel concept of a folded quarter wave impedance transformer is utilized in the design process of a single element for minimizing the overall antenna size. The opposite corners of the patches have been truncated and s...

The increasing need for wearable health monitoring gadgets has led to the development of better antenna technology for reliable wireless communication in small, wearable designs. This paper introduces a new way to create a wearable Multiple-Input Multiple-Output (MIMO) antenna specifically for health monitoring. Working at the sub 6 GHz frequency,...

This paper introduces an innovative band stop filter specifically designed to reject a sub-6GHz band within the 5 G spectrum. Fabricated on an FR4 substrate with a relative permittivity of 4.4, the filter incorporates a defected ground structure (DGS) and features very compact dimensions of 19 mm × 11 mm × 0.8 mm. The filter design is performed usi...

In this study, the gain of a printed antenna is boosted for utilization in 5G systems by employing a phase-oriented graded index-type lens system. In the prescribed design, various metamaterial unit cells are arranged as arrays with radial phases for the graded meta lens to optimize transmission characteristics. The suggested arrangement creates a...

A terahertz fractal antenna integrated with a metamaterial frequency selective surface (FSS) is designed for gain enhancement purposes. The designed antenna operates in various modes of operation to provide biconical and conical radiation patterns. A novel frequency-selective surface has been constructed and combined with a simple fractal antenna s...

The current paper describes a compact, long-reading-range tag antenna for radio frequency identification (RFID) applications in the ultra-high frequency (UHF) band, operating at 915 MHz. The antenna's miniaturized design is achieved through the utilization of the meandering line technique. A T-matching structure matches the chip impedance to that o...

This article introduces the development of a Multi-Input Multi-Output (MIMO) antenna array specifically designed for 5G millimeter-wave (mm-wave) communication systems. The suggested MIMO configuration consists of four antenna arrays, each comprising two elements arranged evenly, operating at 26 GHz and 37 GHz with a physical size of 43 mm × 32.5 m...

Environmental safety is one of the key issues that are directly related to a country's prosperity. One of the most fundamental aspects of a sustainable economy is waste management and recycling. Better recycling safety and efficiency may be achieved via the use of intelligent devices rather than manual effort. In this research, we describe a machin...

This article presents a novel dual-band metamaterial bandpass quasi-elliptic filter (DBBPF) for wireless communication applications, addressing the critical need for compact, high-performance multi-band filters in modern systems. The proposed filter leverages substrate-integrated waveguide cavity (SIWC) technology combined with innovative complemen...

This article introduces a novel semi-flexible dual-band-printed MIMO antenna designed for 5G communication systems at 26 and 31 GHz in the mm-wave spectrum. The antenna, featuring a radiating decagonal patch with integrated multiple slots, achieves dual-band impedance bandwidth and circular polarization. With notable gains of approximately 8.74 dBi...

In the current article, FSS-based terahertz antenna design for the current wireless systems with high gain operating at 5.25 THz has been articulated in the form of cost-effective manner. Various metamaterial unit cells are used to design the combination of FSS and patch antenna design, and placing a distance from FSS structure to patch is 8 µm ach...

The exploitation of optoelectronic components and devices in the visible to infrared (NIR) spectrum requires unique electromagnetic qualities, which makes the choice of the size and shape of such a structure a main factor in having a stylish and crucial design. In this chapter, a near-perfect metamaterial absorber (PMMA) is proposed with numerical...

In the current 4-element rectangular slots, they are arranged at the four corners of the FR-4 substrate material with 40 mm × 40 mm compact size. The four patches are arranged one orthogonal to other and back side of the ground plane considered as monopole ground plane for obtaining the better mutual coupling. The designed structure covers the wave...

This research article presents a multi-band compact MIMO antenna of dimensions 90 μm × 44 μm for the THz spectral region. In the structure a series of fractal crosses are arranged in a circle around a circular path. This antenna configuration offers better isolation and multi-band frequencies among the radiating elements. The current design gives S...

The terahertz band gap, which covers the wavelength range from 0.1 to 10 THz and lies between microwaves and optical wavelengths, defines the terahertz frequency. Graphene is a graphite laminar layer possessing remarkable optical, mechanical, and electrical capabilities. This article presents a broadband graphene for THz band applications based on...

At the THz frequency range, the modern advanced ultra-high speed and smart wearable devices required highly efficient, low profile, and low-cost radiator designed with high directionality propagation loss addressed. In this work, it presented photonic crystal MIMO structure with high gain, better mutual coupling and a novel shape designed. The desi...

Next generation wireless communication systems specific characteristics that include multimedia assistance, fast connectivity, and exceptionally reliable performance in their capability set. If improved data can be obtained inside the distinctive features will surely have a higher probability of accomplishment. The World Radiocommunication Conferen...

Over the last decade, researchers from all over the world have become very much interested in the terahertz gap, which has a frequency range of 0.1 to 10 THz. The terahertz band can be regarded as the next frontier for wireless communications. This work is related to the design of an octagonal-shaped metasurface-based multiband super absorber for v...

Because of its qualitative importance in several aspects, especially biomedical ones, the characterization of solid materials has recently attracted the interest of scholars. The detection of such a material based on its dielectric constant with reliable precision represents the main desired objective. In this paper, a miniature sized microwave...

Significant advancement has been witnessed in the field of modern communication technol- ogy in last decade. Several wireless systems such as Wireless LAN, Wireless Fidelity (Wi-Fi) etc. are popular to connect devices to facilitate communication between them through internet tech- nology. To access much faster communication, higher data rates are...

The small-sized planar antenna represents a basic element for wireless communication systems. In this paper, a novel dual-band coplanar antenna is reported and designed for wireless communications applications. The proposed antenna is based on the unusual electromagnetic behavior of complementary split ring metamaterial resonators (CSRRs). In its...

This research article presents the design and realization of a flexible semi-circular shaped ultra-wideband (UWB) printed antenna based on metamaterial superstrate for medical applications. In this article, at first, the design of a semi-circle structured UWB patch antenna is performed which provides an ultra-wide impedance bandwidth [2.83–13.57] G...

A perfect metamaterial absorber (MMA) using a SiO2 substrate has been designed. The suggested absorber model was created by implementing graphene as a metallic layer for the structured patch and copper in the ground plane of the design. The geometry of the prescribed absorber was finalized by cutting the rectangular and circular slots and loading t...

A high-isolation wideband MIMO (Multiple-Input Multiple-Output) antenna, shaped like a palm tree, is designed for 5G wireless communication purposes. The propounded MIMO antenna is formulated on an FR4 substrate, featuring a quartet of ports and adhering to a precise dimension of 45 × 50 × 0.8 mm3. A detailed analysis of the proposed high isolation...

Metamaterial technology indeed holds great promise for enhancing wireless communication, especially in the development of advanced filters and devices. The use of metamaterials for filter design is an exciting and promising area of research, driven by their exceptional properties and potential for revolutionizing var- ious technological applicati...

In this paper, a compact square stub-loaded band pass filter (BPF) is designed and investigated for quality factor improvement analysis. A detailed analysis has been presented to demonstrate the superior power handling capability of the proposed microstrip bandpass filter without any degradation in its electrical performance parameters. For this pu...

A circularly polarized (CP) antenna with ultra-wideband resonance and a broad axial ratio bandwidth is designed for UWB communication systems. The prescribed design comprises of a modified annular ring-shaped radiator and a modified step-graded slots loaded partial ground plane. The projected antenna is prototyped on FR4 substrate of 35 × 30 × 1.6...

In this work, a compact quadruplet arrow slotted elliptical shaped notch band printed microstrip antenna is designed and analyzed for modern wireless communication systems. Initially, a compact elliptical-shaped antenna model with defected ground structure is designed for ultra-wideband (UWB), having a working range of 3.1 to 10.6 GHz. The desig...

This article presents a meticulously engineered MIMO antenna system tailored specifically for 26 GHz millimeter-wave applications. It integrates a compact planar-patterned metamaterial (MTM) structure, carefully designed with split square and hexagonal unit cells to realize an effective near-zero index (NZI) range for both permeability and permitti...

The article proposes a broadband dual-port planar multiple-input-multiple-output (MIMO) antenna for the lower sub-6 GHz band (1.67 GHz to 3.15 GHz) applications. The simple structure of the MIMO antenna system consists of a semi-annular ring-shaped patch with a covering cap-like structure connected with two symmetrical L-shaped like structures. A p...

*CALL FOR BOOK CHAPTERS* BOOK TITLE---Millimeter Wave and Terahertz Devices for 5G and 6G systems: Modern Design Aspects and Optimization The book will be published by SPRINGER in the SCOPUS Indexed book series “Signals and Communication Technology [Scopus Indexed] Dear Author!!! We are delighted to invite your original research works for the b...

The primary focus of this paper is to evaluate the channel capacity of a Terahertz (THz) communication system using a Multiple Input Multiple Output (MIMO) technique. By deriving mathematical expressions for channel capacity and considering practical constraints, the paper provides insights into the performance of such systems under various conditi...

This article presents a newly developed quad port-MIMO antenna, showcasing notable advancements in performance and an extensive impedance bandwidth. The antenna design is founded on a symmetrical configuration, incorporating an X-shaped decoupling structure, alongside employing the multi-slit and multi-slot techniques. These enhancements culminate...

A novel antenna system that utilizes multiple‐input and multiple‐output (MIMO) technology to suit the requirements of 5G applications is proposed in this article. The antenna has a wide operating bandwidth and high isolation in n257/n258/n261 5G bands. The suggested arc‐shaped MIMO antenna is composed of four similar patch units with modified groun...

In this paper, a complementary split ring resonator (CSRR) loaded compact CPW-fed circular shaped monopole UWB antenna with dual band notch characteristics is designed on an FR-4 substrate. The propounded band-notched UWB antenna is integrated with two frequency selective surface layers referred as bandpass frequency selective surface (FSS-1) and r...

Solar energy harvesting has become an attractive technique for nanotechnology. The absorption of electromagnetic (EM) radiations in the visible range requires unique absorbers of particular optical characteristics. In this research paper, a novel metamaterial solar absorber (MMSA) is suggested for solar energy harvesting in the nearly-entire visibl...

A compact MIMO antenna with circular polarization, high gain, wide operating bandwidth, and a compact size is designed and suggested for mm-wave 5G applications. The propounded MIMO configuration contains four patch elements of similar geometries in \(4\times 4\) arrangement with individual E-shaped partial ground planes. The desired range of wide...

This research paper deals with a directional high gain PCB [Formula: see text] antenna array for 2.4[Formula: see text]ISM band utilizations. To achieve this antenna array, a well-matched equal-split 9[Formula: see text]dB-power splitter is designed and integrated with the suggested antenna array. It exhibits a wide operating range of 506[Formula:...

This article presents a quad port multi-input multi-output (MIMO) antenna based on arrays of rectangular dielectric resonators for intelligent automotive applications. The proposed MIMO antenna configuration is formulated by integrating four rectangular dielectric resonator antenna (RDRA) arrays. Two RDRAs are configured as E-plane arrays and the o...

An offset fed split ring resonator (SRR) based compact printed antenna is analyzed for Ultrawide-band (UWB) applications. The suggested antenna has been designed and analyzed using High frequency structure simulator (HFSS) on a low-cost FR-4 substrate. The top plane of the designed antenna consists of circle and semicircle combined split ring reson...

A compact co-planar waveguide (CPW) based triple-band printed conformal antenna for on-body applications is presented in this research. In order to accomplish impedance matching, a coplanar structure is employed with the ground on the same plane, and this is printed on the top layer of a polyimide substrate of 0.6 mm thickness. The proposed conform...

This article presents a compact metamaterial absorber that operates at hepta-bands within the microwave frequency spectrum exhibiting more than 85% absorption at each band. The design of this absorber is based on the combination of three resonators that offer seven peaks at 3.15, 5.96, 8.73, 9.36, 13.22, 13.71, and 14.45 GHz with an absorption of 9...