Prantik Dutta

Bio: Prantik Dutta is an academic researcher from Lovely Professional University. The author has contributed to research in topics: Computer science & Albatross. The author has an hindex of 1, co-authored 2 publications receiving 2 citations.

Numerical Design of Non-Reciprocal Bandpass Filters With the Aid of 3D Coupling Matrix for 5G Bands

Abstract: In this brief, numerical analysis on spatio-temporally modulated (STM) non-reciprocal bandpass filters is methodically demonstrated to corroborate the underlying phenomenon. The concept of a 3D coupling matrix is illustrated for the first time, which provides an analytical insight into the distribution of RF energy among the intermodulation (IM) products generated in time-modulated resonators. Flagship equations based on coupling matrix are proposed that bypass the tedious analysis of spectral admittance and ABCD matrices. These equations can be modified to design any ordered filters and with varying cross-coupling instances. The experimental validation confirms the accuracy of the numerical equations, and the model can be utilized to further the development in this burgeoning yet eccentric research domain.

Spatiotemporal Nonreciprocal Filters: Theoretical Concepts and Literature Review

Abstract: Nonreciprocal components are of paramount importance in many electronic systems. Traditionally, reliance on magnetic materials, such as ferrites, has been the basis of the functionality of such components. The internal magnetic moment under the influence of a strong external magnetic bias breaks the reciprocity of the materials [1]. However, today’s state-of-the-art systems demand cost-effective, miniaturized, and integrated solutions. This can be achieved with magnetless nonreciprocal devices that are capable of breaking the Lorentz reciprocity principle [2]. In the past decade, passive metastructures have also been devised to achieve Faraday rotation without magnetic bias. Spatiotemporal biasing of the metasurfaces initiates frequency translation and harmonic mixing properties that, in turn, generate nonreciprocity [3], [4]. Recently, with the advent of magnetless nonreciprocal devices, time-varying circuits have been viewed as a remarkable breakthrough. This has, in fact, paved the path for researchers to develop nonreciprocal devices such as circulators [5]–[14], isolators [15]–[18], gyrators [19], and even leaky-wave antennas [20], [21]. Still, there remain some areas in the field of nonreciprocity that can be explored with the aid of magnetless time-varying circuits. One such area is the implementation of nonreciprocity in bandpass filters.

Evolutionary and Hereditary Traits of an Albatross and its Aerodynamic Optimality

Abstract: The aerodynamic efficiency of the albatross has always fascinated researchers and the designing of drones mimicking the albatross's aerodynamic traits have been a major area of interest for the aerospace industry. This review sheds light on the traits behind an albatross's aerodynamic efficiency such as dynamic soaring, bell shaped lift distribution and provides insights into its hereditary posed encodings and evolutions. The soaring techniques have been introduced and discussed along with the albatross's morphology and structure which is responsible for its efficiency. In addition, the albatross's navigational and foraging strategies are briefly discussed to provide a better understanding of the effects of atmospheric conditions on the albatross's flight characteristics and the limitations.

Compact Tunable Non-Reciprocal Bandpass Filter with the aid of Combline Architecture

Abstract: Time-varying transmission lines (TVTL)-based non-reciprocal filters have lately grown in popularity. Their functionality is based on the use of sinusoids with progressive phase shifts to time-modulate spatially separated resonators. This work presents an EM simulated response of a non-reciprocal bandpass filter designed using combline architecture. The design methodology has been analyzed with the aid of coupling matrix and the circuit manifests a compact and tunable non-reciprocal bandpass response suitable for mobile communication frequency range. The variation of insertion loss, isolation, and return loss is 3.7 dB to 4.1 dB, approximately 20 dB, and 20 dB respectively, throughout the tunability range. The circuit possesses the potential for deployment in any monolithic integrations.

Performance and Design Investigation of Heavy Lift Tiltrotor with Aerodynamic Interference Effects

Abstract: Abstract : The aerodynamic interference effects on tiltrotor performance in cruise are investigated using comprehensive calculations, to better understand the physics and to quantify the effects on the aircraft design. Performance calculations were conducted for 146,600-lb conventional and quad tiltrotors, which are to cruise at 300 knots at 4000 ft/95 deg F condition. A parametric study was conducted to understand the effects of design parameters on the performance of the aircraft. Aerodynamic interference improves the aircraft lift-to-drag ratio of the baseline conventional tiltrotor. However, interference degrades the aircraft performance of the baseline quad tiltrotor, due mostly to the unfavorable effects from the front wing to the rear wing. A reduction of rotor tip speed increased the aircraft lift-to-drag ratio the most among the design parameters investigated.

Systematic innovation combined with bionic technology applied to innovative research on UAV

Abstract: This study aims to improve the two major problems faced by UAVs, short battery life and difficulty detecting hovering, respectively. For the problems mentioned above, this study derives the application of bionic technology and the integration of green energy innovation through systematic innovation theory, designing the operation of UAVs using this research method. The scope includes research on bionic technology, systematic innovation, innovation of unmanned aerial vehicles, and conduct fluid analysis for the output results, watching to confirm the hovering state, and analyzing the battery life to ensure the improvement of power supply, the output, and verification of this research can significantly improve the future development and application of UAVs.

Compact Tunable Non-Reciprocal Bandpass Filter with the aid of Combline Architecture

Abstract: Time-varying transmission lines (TVTL)-based non-reciprocal filters have lately grown in popularity. Their functionality is based on the use of sinusoids with progressive phase shifts to time-modulate spatially separated resonators. This work presents an EM simulated response of a non-reciprocal bandpass filter designed using combline architecture. The design methodology has been analyzed with the aid of coupling matrix and the circuit manifests a compact and tunable non-reciprocal bandpass response suitable for mobile communication frequency range. The variation of insertion loss, isolation, and return loss is 3.7 dB to 4.1 dB, approximately 20 dB, and 20 dB respectively, throughout the tunability range. The circuit possesses the potential for deployment in any monolithic integrations.

Design and Modeling of a Biotechnological Nanofiltration Module Using Bacterial Cellulose Membranes for the Separation of Oily Mixtures

Abstract: The environmental impacts of the exploration and use of petroleum and derivatives in recent decades have led to increasing interest in novel materials and processes for the treatment of oily effluents. Oily emulsions are difficult to manage and, in some cases, require different types of treatment or combined methods for phase separation. Sustainable, versatile, innovative biomaterials, such as bacterial cellulose (BC), have considerable applicability potential in mixture separation methods. In the present study, a cellulose membrane produced by a symbiotic culture of bacteria and yeasts (SCOBY) was investigated with the aim of measuring the characteristics that would enable its use in the treatment of oily wastewater. BC was analyzed through physicochemical characterizations, which demonstrated its porosity (>75%), chemical structure with high cellulose content and a large quantity of intramolecular H bonds, good thermal stability with maximum degradation at temperatures close to 300 °C, high crystallinity (66%), nanofibrils of approximately 84 nm in diameter and mechanical properties that demonstrated tensile strength of up to 65.53 Mpa, stretching of approximately 18.91% and the capacity to support a compression load of around 5 kN with only the loss of free water in its structure. The characteristic data of the membranes were used for the production of a filtering module for oily mixture separation processes. This support was developed with computational fluid dynamics of finite volumes and finite element structural analysis using advanced computer-assisted engineering tools. Lastly, the conceptual, basic project of a low-cost nanofiltration module was obtained; this module could be expanded to the industrial scale, operating with several modules in parallel.