A5006045301- Microwave Engineering and Waveguides
- Microwave and Dielectric Measurement Techniques
- Radio Frequency Integrated Circuit Design
- Advanced Antenna and Metasurface Technologies
- Analog and Mixed-Signal Circuit Design
- Robotic Mechanisms and Dynamics
- Healthcare and Environmental Waste Management
- Modular Robots and Swarm Intelligence
- COVID-19 and healthcare impacts
- Infection Control and Ventilation
- Low-power high-performance VLSI design
- Advanced Power Amplifier Design
- Dynamics and Control of Mechanical Systems
Islamic Azad University, Shoushtar Branch
2024
K.N.Toosi University of Technology
2020-2022
Sahand University of Technology
2011
This work presents a new analytical transmission line model for microstrip T‐resonator dielectric constant measurement method in order to simplify the extraction of complex permittivity substrate and increase its accuracy. The proposed formula, which is based on T ‐matrix equivalent circuit structure, only dependent propagation attenuation constants stub line. Two formulas determine end effect open‐ended parameters are also presented. As an example, implemented 31 mil RO4003C substrate, it...
This article presents a novel resonance method by using cross-resonator (CR) for the complex permittivity measurement of planar dielectric substrate materials with its full theoretical and analytical transmission line (TL) model. Due to symmetrical structure, it offers two main advantages over conventional counterpart. First, unwanted asymmetricity mode is eliminated due centric magnetic wall. Second, electric field at junction open-ended stub uniform. The propagation constant structure in...
This paper presents a design and simulation of reconfigurable delta sigma modulator (DSM) that can handle GSM/WCDMA/WLAN standards. The makes use low distortion suppression topology which is suitable for wide band application. In GSM mode 2 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">nd</sup> order DSM used to achieve peak SNR 90 dB with over sampling ratio 160 bandwidth 0.2 MHz. WCDMA modified by noise shaping enhancement technique 3-bit...
Background: SARS-CoV-2, the causative agent of COVID-19 pandemic, spreads through both direct and indirect pathways. Among latter, surface contamination is a significant concern due to virus’s prolonged viability on surfaces. There ongoing discussion over impact environmental contamination, especially in light introduction novel viral types. The present study aimed examine extent across different hospital wards evaluate effectiveness disinfectants inactivating virus. Methods: samples were...
Cable-driven parallel robots with redundant actuators are faced the problem of loose cables, especially when robot is deployable and controlled within joint space. This paper aims to addresses this shortcoming by proposing a suitable robust controller which requires no expensive positioning sensors such as laser trackers. The robot's embedded force used alongside new sliding surface for avoid cables even in presence kinematic dynamic uncertainties. Therefore, conventional joint-space...