asit panda
@nist.edu
NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY ( NIST)
RESEARCH, TEACHING, or OTHER INTERESTS
Electrical and Electronic Engineering, Artificial Intelligence
Scopus Publications
Scopus Publications
Shaktimayee Mishra, Asit Kumar Panda, and Arun Agarwal
Inderscience Publishers
Laxmi Narayana Deekonda, Sanjay K. Sahu, Asit Kumar Panda, Ratnesh Ranjan, and Shelej Khera
Wiley
AbstractIn this paper, a multimode terahertz absorber is implemented using an ultrathin silicon ring with varying multimodal resonance. The rectangular silicon ring is providing three resonances with creating electromagnetic dipoles. The altering of these resonances is explicitly controlled with the help of a circular graphene ring. The graphene ring is used in the centre for tenability and to achieve perfect absorption. An equivalent circuit model is also presented and verified for the proposed structure. The design is intended to measure the glucose percentage in water. In addition, this can be used as a biosensor for the detection of malaria parasite percentage in water. A few important parameters like sensitivity and quality factors are considered to evaluate the performance of the said design. The sensitivity with analyte thickness is found to be 0.445 THz TU−1, 0.4255 THz TU−1, and 0.4305 THz TU−1. The corresponding quality factor is noted for the lower, middle, and upper bands as 235, 653, and 264 respectively. Further, the sensitivity and quality factors were measured just by changing the refractive index. The new estimated values are 0.480 THz RIU−1, 0.403 THz RIU−1, and 0.562 THz RIU−1 and corresponding quality factors are 203, 555, and 261 for lower, middle, and upper bands respectively. The design is also expected to flourish as a polarization‐insensitive absorber.
Laxmi Narayana Deekonda, Sanjay Kumar Sahu, and Asit Kumar Panda
Springer Nature Singapore
Asit K. Panda, Malabika Pattnaik, and Rajanikanta Swain
Informa UK Limited
This paper proposes topologies for narrowband and broadband notch filters using complementary split ring resonators (CSRR) in coplanar waveguide (CPW) technology. Simple analysis justifies these topologies. Strong coupling between the resonator and the signal line in these topologies can reduce the radiation loss in the stop-bands. Characteristics of these filters realized from electromagnetic simulations match closely with those from measurements on prototypes.
Laxmi Narayana Deekonda, Sanjay Kumar Sahu, and Asit Kumar Panda
IEEE
This paper presents a broadband terahertz (THz) metamaterial absorber. The unit cell structure of this absorber consists of three layers. The top layer of the structure contains a circular graphene ring. At the center frequency of 2THz, this circular graphene ring has a fractional bandwidth of 67% and absorptivity of more than 90%. The proposed absorber is polarization insensitive because of its fourfold symmetrical structure. The graphene parameter is optimized to get maximum bandwidth. This metamaterial offers TE and TM polarization insensitive up to a 60° incident angle of electro-magnetic wave.
Rajanikanta Swain, Deepak Kumar Naik, and Asit Kumar Panda
Institution of Engineering and Technology (IET)
This study proposes an ultra-wideband (UWB) metasurface-based beam-switching antenna system. A coplanar (CP) waveguide fed slot antenna (with 49% operating bandwidth) is coupled with a hexagonal metallic aperture to generate CP beam in the 10.2–10.8 GHz band. An octagonal split ring inclusion-based meta-element is designed to achieve 2π transmission phase variation with near-unity magnitude. The principle of the Pancharatnam–Berry metasurface is used to design an offset metasurface superstrate for tilting the main beam of the UWB antenna for the CP band. Measured results (S 11, axial ratio, and radiation pattern) agree well with full-wave simulations. The fabricated X-band UWB aperture coupled antenna system uses the metasurface superstrate to achieve a broadside beam for the lower band and tilted beam for the upper band. This antenna system holds promise for next-generation vehicular and satellite communication applications.
Asit K. Panda
Springer Science and Business Media LLC
Asit K. Panda
IEEE
This work is dealing with the principle of modelling a 2-D metamaterial reflector lens antenna used as a communication device. The lens antenna is consisting of low loss with wideband E-shaped metamaterial resonators (ESR) and the parabolic reflector. The metamaterial structure shows a negative refractive index (NRI) behaviour to a normally incident wave. The numerical simulation has been carried out using CST microwave studio (MWS) 3-D simulator. The main idea of this present work is to investigate the focusing effect of the planar metamaterial lens and to enhance the radiation pattern by reducing the sidelobe levels and increasing the main lobe level. The simulated results of both far-field and near-field radiation patterns in wider bandwidth, showing high directivity and gain upto 18dBi is achieved.
Asit K. Panda
Springer Singapore
Asit K. Panda
Springer Singapore
Asit K. Panda
IEEE
This paper proposes principles of modeling Luneburg lens for broadband communication application. The modeling of a single Luneburg lens along with a small Luneburg lens with primary Luneburg lens was studied. The results prove the focusing effect of Luneburg principle and also the enhancement of this effect due to the small Luneburg lens acting as a superstrate for primary one.
Asit K. Panda, Sudhakar Sahu, and Rabindra K. Mishra
Hindawi Limited
This article analyzes the radiation principle of a slot‐coupled hemispherical dielectric resonator antenna (DRA) integrated with a single‐layer metamaterial (MTM) superstrate, investigating it both numerically and experimentally. It creates a compact high directive DRA incorporating MTM superstrate. The proposed MTM medium consists of broadside coupled planar E‐shaped resonator periodic unit cell exhibiting low loss and a low refractive index over a broad frequency band. Measurements on fabricated prototypes to verify numerical results from full‐wave simulations, and they show more than 6 dB increase in directivity of the DRA.
Asit K. Panda, Sudhakar Sahu, and Rabindra K. Mishra
Hindawi Limited
This article proposes a compact (43 × 26 × 0.8 mm3) dual‐band two‐element metamaterial‐inspired MIMO antenna system with high port isolation for LTE and WiMAX applications. In this structure, each antenna element consists of a square–ring slot radiator encircling a complementary split ring resonator. A tapered impedance transformer line feeds these radiating apertures and shows good impedance matching. A 2 × 3 array of two‐turn Complementary Spiral Resonator structure between the two antenna elements provides high dual‐band isolation between them. The fabricated prototype system shows two bands 2.34 – 2.47 GHz (suitable for LTE 2300) and 3.35 – 3.64 GHz (suitable for WiMAX). For spacing between two antennas of 10 mm only, the measured isolation between the two antenna elements in the lower band is around −32 dB while that in the upper band is nearly 18 dB. The system shows a doughnut‐shaped radiation patterns. The peak measured antenna gains for the proposed MIMO system in the lower and higher bands are 3.9 and 4.2 dBi, respectively. The MIMO system figure of merits such as the envelope correlation coefficient, total efficiency are also calculated and shown to provide good diversity performance.
Asit K. Panda, Rabindra K. Mishra, and Sudhakar Sahu
Wiley
ABSTRACTThis letter reports numerical and experimental study on a concentric‐edge‐coupled low‐loss MTM structure composed of concentric skewed omega inclusion and capacitive strip wire unit cells for DNG behavior via transmission and reflection characteristics. Modified NRW method provides effective medium parameters, refractive index, and the dispersion characteristic from simulated S‐parameters. It is shown that this MTM exhibits DNG behavior over 3.65–4.53 GHz band. It also investigates the effect of geometrical parameters, like strip width, slit gap, length and width of each side, and arc length on magnetic resonant frequency. Incidence of perpendicularly polarized electromagnetic wave on a host medium embedding metallic skewed omega inclusions interact shows negative material parameters for the composite media in the frequency band of interest. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:847–850, 2016
Asit K. Panda, Ajit K. Panda, Sudhakar Sahu, and Rabindra K. Mishra
Informa UK Limited
ABSTRACT Design of an optimized planar coplanar waveguide (CPW) fed complementing C-shaped patch antenna for broadband communication is presented. It resonates at 2.1 GHz with bandwidth spanning from 1.2 to 2.45 GHz for the return loss of −10 dB or more. In the absence of closed form design formulae for its resonant frequency, this paper proposes use of either artificial neural network (ANN) or simulated annealing (SA). Results from these stochastic methods are in good agreement with those from electromagnetic (EM) simulations as well as prototype measurements. The EM simulations show good radiation characteristics and moderate gain in the entire operating band of the antenna.
Asit K. Panda, Sudhakar Sahu, and Rabindra K. Mishra
SPIE-Intl Soc Optical Eng
Abstract. Artificial neural network and simulated annealing are applied to obtain optimized design parameters of skewed omega-shaped metamaterial unit cells for providing left-handed material (LHM) with a negative refractive index. The implemented numerical and experimental methods provide evidence for the validity and practicality of the technique. Simulation, with optimized parameters, using CST Microwave Studio, shows that skewed LHMs are low-loss materials.
Priya Rahul, Sudhakar Sahu, Asit Panda, and Sasmita Pahadsingh
IEEE
In this paper, a band notched ultra-wideband antenna integrated with complementary split ring resonator (CSRR) is proposed and investigated. The proposed antenna not only covers the UWB frequency spectrum but also avoids interference with HIPERLAN/2 (5.15 GHz - 5.35 GHz) by giving a notch band from 4.98 GHz to 5.37 GHz. The centre frequency of the notched band is 5.2 GHz at which the wireless LAN (HIPERLAN/2) in Europe is assigned. The notch band in the proposed paper is achieved by etching CSRR in the radiating patch. The complementary split ring resonator acts as a bandstop filter and hence enables the rejection of any undesired band within the passband of the antenna. The proposed antenna operates from 2.7 GHz to 13.7 GHz for voltage standing wave ratio (VSWR) less than 2, except the notch band of 4.98 GHz to 5.37 GHz.
K. Satyabrat Sahu and Asit K. Panda
SPIE
In this paper Sierpinski E-Carpet antenna based on the implementation of fractal technique is proposed for multiband applications in 2-10 GHz band. There appeared 5 resonant frequencies at 2.35 GHz, 3.5 GHz, 5.503 GHz, 7.248GHz, and 8.79GHz for 2nd iteration. From the return loss plot it is seen that antenna achieved the IEEE Bluetooth/WLAN (2.4-2.484 GHz), WiMAX (3.4-3.69 GHz) and WIFI (5.1-5.825 GHz) frequency band with -10dB return loss. Also nearly omni-directional radiation pattern is observed. A prototype of the design is successfully implemented with close agreement between measurement and simulation result.
Asit K. Panda, K. Satyabrat Sahu, and Rabindra K. Mishra
IEEE
In this paper we purpose a triangular split ring resonator (TSRR) loaded with co-planar waveguide (CPW) line for realizing a planar band-pass filter for miniaturization and high data rate WiMAX communication system. It consists of a 50Ω CPW line with triangular resonator etched on backside of substrate, parallel to the CPW. Because of negative permeability offered by the SRR and series capacitance this structure exhibits backward wave propagation in the vicinity of its resonant frequency. Due to the strong inductive coupling between resonator and line and periodically loading the line with narrow wires, resulting high selectivity with low insertion loss in the wide band-pass characteristic.
Suryanarayan Patra, K. Satyabrat Sahu, and Asit K. Panda
IEEE
In this paper we purpose a novel compact size CPW-fed complementary Circular split ring resonator (CSRR) printed antenna for WLAN, WiMAX and WCDMA applications. The antenna consists of micostrip line and CSRR unit cell, with a fully covered ground plane. The simulated results show that the antenna can yield an impedance bandwidth of 1.87–2.2 GHz, 3.45–4 GHz and from 5.5–5.9 GHz band with reflection coefficient less than −10dB. The antenna has found nearly omni-directional and gain is around 3dBi for all the bands. The overall dimension of the antenna is 14 × 28mm × 1.6mm, which is suitable for all wireless applications.
Abhishek Sahu and Asit K. Panda
IEEE
This paper investigates the effect of a metamaterial superstrate on a single-feed circularly polarized microstrip patch antenna (SFCP-MPA) using CAD simulations. Simultaneous enhancement on antenna gain (up to 3dB), impedance bandwidth (BWZ) and axial ratio bandwidth (BWAR) are observed as well as multi-frequency operations at 5.125 GHz, 11.34 GHz 12.43GHz. Also it is observed that the invisible first harmonic becomes prominent and visible. Besides, the result also suggest that the Superstrate acts as a DRA (at 12.43GHz).
Asit K. Panda, Manoj K. Panda, and Sudhansu S. Patra
IEEE
The design of a new fractal multi band antenna, based on Sierpinski gasket enabled rectangular geometry is presented in this paper. Two iterations of the rectangular fractal multi band antenna, with CPW feeding in 2-10 GHz band are examined. There appeared 3 resonant frequencies at 2.46 GHz, 3.7 GHz and 5.5 GHz for 2nd iteration. From the return loss plot it is seen that antenna has achieved the IEEE Bluetooth/WLAN/ISM (2.4-2.484 GHz), WiMAX (3.4-3.69 GHz) & WIFI (5.1-5.825 GHz) frequency band with-10dB return loss. Also nearly omni-directional radiation pattern is observed. The peak realized antenna gain is around 4.5 dB in each distinct band.
Asit K. Panda and Abhishek Sahu
IEEE
Metamaterial have been shown to enhance specific performance parameters of low profile antennas. In this paper we investigate appreciably enhancement of the gain & radiation pattern of a low profile micro strip patch antenna by placing a metamaterial slab above it (as a super strate) using CST MWS simulator. This paper proposes a metamaterial super strate surface as a reflective surface for micro strip patch antenna (MPA). The MTM structure was a combination of the triangular SRR (TSRR) and the wire strip (WS) to obtain negative values of permittivity & permeability. The gain of the MPA with MRS is around 5 dB higher than that of conventional MPA on FR4 substrate. These improvements were due to negative refraction characteristics of LHM structure that converts into super-lens, when placed in front of the antenna. The small spacing between MRS and the patch surface was another merit in the present design, which was as low as ?/10 as it results in low profile antenna design, that will suits in modern wireless communication system.
R. Suryanarayana, Una Chandra Sekhar, Ashutosh Mohanty, Asit K. Panda, and Rabindra K. Mishra
IEEE
In this paper, a planar complementing C-shape patch antenna is presented. The optimal design of this antenna offers broadband operation with reasonable radiation pattern. The antenna is modeled as parallel RLC circuit. This compact antenna is realized by employing Duality concept. The antenna achieves-32 dB return loss bandwidth over 2.4 GHz to 4.22 GHz with the resonant frequency at 3.5 GHz, which covers WiMAX and WLAN applications. The CST Microwave studio is employed for designing the antenna. The antenna is fed by a 50-ohm coplanar waveguide (CPW) to make the structure purely planar. The major parameters that influence the performance of the antenna are investigated.
Asit K. Panda, R. Suryanarayana, Abhishek Sahoo, Jayanta Nayak, and Rabindra K. Mishra
IEEE
In this paper, a planar dual band symmetric Meandered Arms monopole antenna for wireless local area network (WLAN) & WiMAX applications is presented. The antenna consists of two symmetric Meandered arms radiating strip leading to generate two separate resonant modes where the first mode is for the 3.5 GHz band and the second mode is for the 5.2/5.8 GHz band operation. The purposed antenna has a measured impedance bandwidths of 3.39-3.5 GHz and 5.5-5.6 GHz, and owns good radiation characteristics impedance bandwidths, with a compact size of 30x35xl.6 mm3.The radiation pattern and resonant frequency are mainly affected by symmetric meandered arms radiating patch and a rectangular ground plane. The CST Microwave studio is employed for designing the antenna. This purposed antenna is fed by a coaxial probe through a SMA connector.