A5014686815- Antenna Design and Analysis
- Advanced Antenna and Metasurface Technologies
- Metamaterials and Metasurfaces Applications
- Energy Harvesting in Wireless Networks
- Microwave Engineering and Waveguides
- Wireless Body Area Networks
- RFID technology advancements
- Microwave Imaging and Scattering Analysis
- Ultrasound and Hyperthermia Applications
- Wireless Power Transfer Systems
- Advanced Sensor and Energy Harvesting Materials
- Cancer Research and Treatments
- Bluetooth and Wireless Communication Technologies
- Agriculture, Soil, Plant Science
- Antenna Design and Optimization
- Full-Duplex Wireless Communications
- Modular Robots and Swarm Intelligence
- Microwave and Dielectric Measurement Techniques
- Electromagnetic Compatibility and Noise Suppression
- Electromagnetic Fields and Biological Effects
- Electromagnetic Compatibility and Measurements
- Molecular Communication and Nanonetworks
Thapar Institute of Engineering & Technology
2020-2024
Indian Institute of Technology BHU
2013-2019
Banaras Hindu University
2013-2019
Indian Institute of Technology Guwahati
2016
Indian Institute of Technology Indore
2013-2014
Closed ring resonator (CRR)-based quad-band metamaterial absorber is presented. The unit cell of proposed consists four separate CRRs which are diagonally connected to square patches enclosed within an individual CRR. structure fabricated on 0.8 mm-thick FR4 substrate. Simulated peak absorptivities 98.5, 97.7, 94.8, and 96% obtained at 4.34, 6.68, 8.58, 10.64 GHz, respectively. measured simulated absorption characteristics the in good agreement. wide angle polarisation insensitive has...
In this study, the authors present three different metamaterial absorbers (MMAs) namely, T, split‐I (SI) and split‐Jerusalem cross (SJC) with dimensions geometrical configurations. The absorption rates of T‐, SI‐ SJC‐shaped are studied at microwave frequencies. T‐shaped absorber demonstrates perfect 10.19 GHz, making it suitable for single band operation, whereas SI‐shaped exhibits two peaks 9.32 10.75 GHz finding its application in dual operation. However, novel multiple 9.92, 10.42, 10.93,...
In this letter, a low-profile quad-band antenna array for multiple-input-multiple-output (MIMO) application has been presented. The proposed two-antenna operates at GPS L1/Bluetooth/Wi-Fi/LTE2500/WiMAX/HIPERLAN1 frequency bands. Each element an area of 25×10 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> over small ground plane the size 100×60 . To maintain element, folded patch is used. A rectangular slot etched on main radiator to...
Abstract This paper presents the design and application of a planar H-plane horn antenna for agricultural purposes, specifically treatment loamy wet soil using microwave radiation. The is designed Substrate Integrated Waveguide (SIW) technology resonated at 2.45 GHz, having size 1.37λ0× 1.04λ0× 0.012λ0. To achieve unidirectional radiation pattern on an ultrathin substrate 0.012λ0, two exponential slots are incorporated top bottom substrate. gain further enhanced interdigital capacitance...
Radiofrequency identification (RFID) technology has been gaining traction in various industries for its applications and tracking. Lately, there a growing interest chipless RFID tags due to their cost-effectiveness wide-ranging utility. Among the innovations this domain, orientation-independent are emerging as promising solutions future sensing devices. The primary objective of paper is investigate adaptability tags, specifically terms resistance rotation. second attain high coding capacity...
A polarization insensitive, wide angle low profile metamaterial absorber with dual-band absorption characteristics in C- and X-frequency bands is presented this paper. The parametric variation discussed details to understand the dependence of frequency level on design parameters. proposed structure supports realization near unity at two frequencies independently by suitably varying mechanism explained E-field surface current distribution plots peak frequencies. due simultaneous excitation...
In this paper, isolation between planar inverted-F antenna (PIFA) array elements is improved by using an of metamaterial unit cell for 5 GHz WLAN applications. The designed element 12 × mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> size with overall height 5.8 over a ground plane 100 40 . proposed dual band absorber 13 0.8 mm3 and 4 2 used as isolator. Isolation increases from 22.5 dB to 33 32.5 in its best cases 1 (5.15 - 5.35 GHz)...
A compact metamaterial absorber working in X-band is presented this paper. The unit cell consists of square patch enclosed within the shaped closed ring resonator (CRR) and diagonally connected with each other via a tilted strip. proposed structure having dual band absorbance peak absorptivity 95.16% 97.84% at 8.70 GHz 10.64 GHz, respectively. Furthermore, broadband achieved from same by adjusting design parameters. over 90% 8.50-11.13 GHz. experimental Full width Half Maximum (FWHM)...
Abstract In this article, a metamaterial absorber structure is analyzed using the transmission line method (TLM) considering normal incidence of wave. The unit cell presented composite geometry providing dual‐band absorption. Peak absorptivities 95.02% and 99.84% are obtained at 4.215 GHz 10.95 GHz, respectively. experimentally validated simulated reflection response used as reference to validate analytical structure. To obtain equivalent circuit model, frequency selective surface (FSS)...
A compact dual‐band planar inverted‐F antenna in conjunction with an inverted L‐shaped parasitic and reduced ground‐plane structure working the GPS (Global Positioning System) band (1565–1585 MHz) Worldwide Interoperability for Microwave Access (3300–3800 is presented. The meets strict space requirements of portable devices final design fits a volume 100 × 24 9.7 mm 3 (L W H). It composed series branches, properly dimensioned separated to generate resonances at desired frequencies....
In this paper, A triple band multiple-input-multiple-output (MIMO) antenna array is proposed for a conveyable wireless device WLAN applications (band 1: 2.4 - 2.484 GHz, 2: 5.15 5.35 and 3: 5.725 5.825 GHz). The consists of two monopole components which are separated by approximately one-tenth the wavelength lower frequency (2.45 order to reduce radiator size, it designed in shape F branches responsible producing designated bands. resonance centered at 2.45 GHz covering 1 while 5.4 2 3. Both...
A four-element MIMO (multiple-input multiple-output) antenna system utilizing planar inverted-F for 5 GHz WLAN (wireless local area network, band 1: 5.15–5.35 GHz, 2: 5.725–5.825 GHz) access point applications is presented in this paper. The detrimental effects of practical device environment on the isolation performance are compensated using an array metasurface-based isolator between elements. proposed partially absorbs fields responsible coupling and rotates polarization rest coupled...
A metamaterial absorber with absorption in C and X band is presented this paper. The unit cell of the consists square patch enclosed within shaped closed ring resonator (CRR) connected at all four corners each other. proposed structure having dual absorbance peak absorptivity 90.7 % 99.6 4.2 GHz 10.62 GHz, respectively. has identical characteristics for angles polarization. Power loss density dielectric surface also calculated.
A double spiral antenna with an artificial magnetic conductor (AMC) is designed, fabricated, and experimentally tested for hyperthermia treatment as a microwave power radiator. The proposed has compact structure, designed on FR4 substrate thickness of 1.6 mm, the dimensions 32 × 3.27 mm3. width space between arms 1.54 inner outer radius arm 1 12.82 mm. fed by aperture feeding having 16 14 mm2 that enhances antenna's bandwidth. Further, AMC unit cell (as reflector) to enhance performance,...
A slim dual-band planar inverted-F antenna (PIFA) in conjunction with a L-shaped parasitic and reduced ground structure working the GPS (Global Positioning system) band (1565-1585 MHz) WiMAX (Worldwide Interoperability for Microwave Access) (3300-3800 is presented. The designed to be integrated portable devices meets strict space requirements. final design fits volume of 100 × 24 9.7 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> (L...
3 D metallic horn antennas are designed at 2.45 GHz and used for soil treatment. In this research, Substrate Integrated Waveguide (SIW) based planar H plane antenna as an alternative to is agricultural treatment using microwaves. The on single Roger 5880 substrate of thickness 1.575 mm. suggested excited by coaxial feed. integrated with antipodal Vivaldi shape that provides the similar unidirectional radiation pattern horn. So, can be considered a better antenna. performance revealed...
In this paper, a compact and flexible spiral antenna is designed for superficial tumor treatment having different shapes sizes. The proposed consists of radiating patch with coplanar waveguide feed. on FR4 substrate thickness 0.15 mm size the 18 × 19 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> . performance (FSA) tested in presence heterogeneous phantom (skin, fat, muscle) also replicate human model (Voxel model). bending effect FSA...