A5112575178- Microwave Engineering and Waveguides
- Microwave and Dielectric Measurement Techniques
- Acoustic Wave Resonator Technologies
- Ionosphere and magnetosphere dynamics
- Advanced Antenna and Metasurface Technologies
- GNSS positioning and interference
- Antenna Design and Analysis
- Advanced Fiber Optic Sensors
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Magnetic Field Sensors Techniques
- Antenna Design and Optimization
- Earthquake Detection and Analysis
- Radar Systems and Signal Processing
- Millimeter-Wave Propagation and Modeling
- Vibration and Dynamic Analysis
Mustansiriyah University
2019-2025
Universitatea Națională de Știință și Tehnologie Politehnica București
2019-2020
University of Bucharest
2019
The permittivity of a material is an important parameter to characterize the degree polarization and identify components impurities. This paper presents non-invasive measurement technique materials in terms their based on modified metamaterial unit-cell sensor. sensor consists complementary split-ring resonator (C-SRR), but its fringe electric field contained with conductive shield intensify normal component field. It shown that by tightly electromagnetically coupling opposite sides...
This article presents a novel microstrip patch sensor featuring four rectangular rings represented by single complementary split-ring resonance (SC-SRR) to calculate the complex permittivity of saline solutions within range 0 ppt 100 ppt. operates via turbulence technique, utilizing its resonant properties as indicators find parameters liquid under test (LUT), which arise due variations in salt concentration altering permittivity. alteration influences frequency (fr), reflection coefficient...
In this paper, a sensor using modified Split Ring Resonators (SRRs) is designed, simulated, fabricated, and used for advanced investigation precise measurements of the real part imaginary solid dielectrics' permittivity. Adding vertical strips tightly coupled to outer ring SRR leads appearance two resonant frequencies at 1.24 GHz 2.08 GHz. This geometry also assures an improved sensitivity. Using full wave electromagnetic solver, both unloaded loaded sensors are investigated. The numerical...
A microstrip highly sensitive differential sensor for complex permittivity characterization of urine samples was designed, fabricated and tested. The sensing area contains two pairs open-stub resonators, the working frequency unloaded is 1.25 GHz. easily implemented on an affordable substrate FR-4 Epoxy with a thickness 1.6 mm. Teflon beaker mounted without affecting measurements. Numerically, liquid mixtures water at different percentages were introduced to proposed evaluate variation....
In this study, a two-port network-based microwave sensor for liquid characterization is presented. The suggested built as miniature resonator using the third iteration of Hilbert’s fractal architecture. structure used with T-resonator to raise quality factor. printed on FR4 substrate and has footprint 40×60×1.6mm3. Analytically, theoretical investigation made clarify how might function. created put test in an experiment. Later, two pans contain urine Sample Under Test (SUT) are sensor....
In this paper a new approach for first order Chebyshev parallel coupled Bandpass filter resonant at 1 GHz is presented to obtain better results (wideband rejection, high selectivity and low bandpass insertion loss) compared conventional design. The proposed (a tri-formation consisting of CSRR, SRR stubs stepped impedance are loaded microstrip resonator) can be configured, by laying split ring resonator (SRR) complementary (CSRR) with 50 Ω lines, in addition effect loading two around center...
The development of a compact and straightforward circularly polarized hexagon-microstrip patch antenna with two layers single feed is presented. Circular polarization achieved using strategies. first technique incorporates narrow slot along one vertex hexagonal patch's diagonal, opposite the line. second based on embedding complementary split ring resonator patch. proposed excited by an aperture coupling feed, it implemented substrate materials; Roger droid/RT-5880, RO 4350. This work...
The ionosphere is the region in space that restricted distance above Earth and it contains free electrons ions disturb electromagnetic waves when pass through it. Several models were used to investigate conditions. These use mainly two parameters evaluate perturbations ionosphere. are electron density TEC (Total Electron Content) which they control ability of reflections frequencies propagation characteristics investigated. This paper uses four estimate perturbations. goal this was choose...
A new model of microwave planar sensor established on the complementary split ring resonator (CSRR) as well an air hole in substrate structure is introduced for a precise measurement materials permittivity. The filled into microstrip line. CSRR with selected sensitivity analysis, result to hold over quite sensitive compared without and thus evidence be more suitable design. form CSRRs operating at 1.74–3.4 GHz band explained. At resonance, it found that electric field produced straight plane...
In this work, complementary split-ring resonator (CSRR) and (SRR) unit cells structures are investigated simulations performed in order to find out transmission zero frequency f <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">r</inf> (S xmlns:xlink="http://www.w3.org/1999/xlink">21</inf> ) depending on band of the negative permittivity or permeability. The proposed analytic method based calculation frequency, specific which is limited by lower...
This paper presents an ultra-wideband tapered slot patch antenna with bi-directional radiation, reconfigurable for dual band-notched capability and fed by coplanar waveguide. The proposed showed excellent characteristics bandwidth of (1.9–12 GHz). In order to reduce the interference narrow band communications represented Worldwide Interoperability Microwave Access radiation in range (3.4–3.9) GHz standard IEEE 802.11a. application (from 5.1 6.1 GHz), was accompanied adjustable dual-stop...
The ionosphere can be described as a complex natural world. whole edifice of contemporary science stands on the shoulders satellite communication interconnected theories. has crude arguments. is giant layer that extends from 80 to 1000 km above Earth. contains free electrons and ions. These particles contribute disturb propagation electromagnetic waves pass through ionosphere. could refract or disperse This paper will study impact reflection absorption in for what relation among them....
Free electrons and ions dominate the ionosphere. The ionosphere region could be defined from 80 to 1000 km. largest free are concentrated approximately in altitude 350 km for Iraq Romania regions. has many characteristics like troposphere. screening of charges takes place As a consequence, also suffers discharging. In this work, it been investigated that is troposphere they suffer charge producing high voltage. equations were used derived these purposes. made him real perfect conductor cover...