A5101578178- Antenna Design and Analysis
- Radio Frequency Integrated Circuit Design
- Microwave Engineering and Waveguides
- Advanced MIMO Systems Optimization
- Analog and Mixed-Signal Circuit Design
- Microwave and Dielectric Measurement Techniques
- Advanced Antenna and Metasurface Technologies
- Energy Harvesting in Wireless Networks
- Wireless Body Area Networks
- Advancements in Semiconductor Devices and Circuit Design
- CCD and CMOS Imaging Sensors
- Antenna Design and Optimization
- Advanced Power Amplifier Design
- Ultra-Wideband Communications Technology
- Advancements in PLL and VCO Technologies
- Clay minerals and soil interactions
- Agricultural Science and Fertilization
- Analytical Chemistry and Sensors
- Semiconductor materials and devices
- Integrated Circuits and Semiconductor Failure Analysis
Bahauddin Zakariya University
2013-2024
University of Electronic Science and Technology of China
2018-2019
National Institute of Technology Warangal
2018
In this paper, the systematic design of a multiple antenna system for 5G smartphone operating at 3.5 GHz multiple-input multiple-output (MIMO) operation in smartphones is proposed. The preferred to be lightweight, thin, and attractive, as result metal casings have become popular. Using conventional antennas, such patch antenna, Inverted-F or monopole, proximity casing leads decreasing its total efficiency bandwidth. Therefore, slot embedded can helpful, with good performance regarding...
In this article, a compact four-port MIMO antenna system resonating from 4.7–5.1 GHz on −6 dB criteria is discussed. The proposed antennas are arranged in perpendicular manner providing diversity with good isolation characteristics. was fabricated and designed commercially available low-cost FR-4 substrate relative permittivity of 4.4. total size the 40 × mm2, minimum 25 observed at most nearby elements. tested an in-house facility, measured results agree well simulations. characteristics,...
Abstract This article introduces a wide-band MIMO antenna system with eight elements specifically designed for future handheld devices. The is integrated into 150 × 75 mm 2 main board DGS beneath it, connected to feed lines, and etched onto the ground plane. Covering two distinct 5G bands from 3 GHz 3.6 3.9 GHz, 900 MHz impedance bandwidths, this enables efficient data transmission reception across these crucial frequency ranges. exhibits pattern spatial diversity characteristics, achieving...
In modern communication systems, ultra-wideband (UWB) technology has garnered substantial attention due to its superior attributes compared traditional narrowband systems. Over the past decade, UWB also found applications in microwave-based imaging This study introduces a simple planar coplanar waveguide-fed circular shape arc slot antenna designed specifically for biomedicine and microwave medical applications. The proposed design is implemented on 1.6-mm-thick FR4 substrate with relative...
This paper discusses the alternating-current (AC) and direct-current (DC) characteristics of Trigate FinFETs. A modified non linear DC model is proposed to predict <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">I</i> − xmlns:xlink="http://www.w3.org/1999/xlink">V</i> with effect an efficient technique for extraction AC small signal parameters. The parameters using S-measurements can be developed on advance design system (ADS) software which...
In this work, a low-cost, deployable, integratable, and easy-to-fabricate multiple-input multiple-output (MIMO) Kirigami antenna is proposed for sub-6 GHz applications. The MIMO inspired by art, which consists of four radiating parasitic elements. elements are composed rectangular stub. These placed in such way that they can provide polarization diversity. designed fabricated using soft printed board material called flexible copper-clad laminate (FCCL). It observed from the results resonates...
A CMOS small signal model suitable for millimeter wave applications and its parameter extraction has been proposed. In the model, multi bias nonlinear behavior of S11 S22 are characterized. addition, effects intrinsic extrinsic parameters scrutinized. To verify validity, a 32-finger MOSFET in 90-nm process is fabricated examined under conditions. An excellent agreement between measured calculated have accomplished which shows that performance transistor up to 66 GHz can accurately be error...
Nowadays, more attention has been given into ultrawideband by dint of its extraordinary features over narrowband communication systems. This study presents a novel compact with tilted square frames shape antenna partial ground plane. The proposed is printed on commercially available Fr4 substrate relative thickness 1.6 mm. dimensions 14 × 18 mm2 bandwidth ranging from 3.3 to 11.5 GHz. peak gain obtained 1.4 dBi omnidirectional radiation characteristics throughout the entire bandwidth....
A single stage low noise amplifier is developed for Ku-band applications. The design aimed to provide figure and high associated gain. Submicron gate length GaAs MESFET used as an active device because of its superior frequency properties. Device equivalent circuit parameters are first evaluated with without pad capacitors using measured S-parameters. Low then designed by employing common source configuration. Additional components employed achieve unconditional stability. Whereas, matching...
Abstract A scalable small signal model for RF CMOS transistor is presented in this paper. The consists of interconnects, substrate network, and intrinsic parameters. proposed scaling rules characterize the transistors with different numbers fingers. Based on this, bias dependency, linear, nonlinear behavior all parasitic components are evaluated. set models validated by fabricating 90‐nm process, gate width 650 × 8 nm, 16 32 64 respectively. Further, validity carried out comparing calculated...
This paper presents a high linearity wide band low noise amplifier for 5G front-end receiver systems. The proposed LNA has two common source stages cascade in current reused topology. An inductor based wideband inter-stage matching network acts to share the bias current, improve gain and figure performance. Besides series RC is connected second stage gate terminal stability significantly reduce return loss. design of this demonstrated 0.5μm GaAs pHEMT process. According post-layout...
Understanding the dynamics of potassium (K) and its availability is fundamental in efficient use as an important nutrient. The objectives present study were to compare standard K extraction methods for extractable kinetics adsorption on five different textured soils. soils analyzed physico-chemical properties, contents adsorption. had variable soluble (8-52mg kg-1), exchangeable (13-215mg fixed (488-1836mg structural (2936-26362mg kg-1) total (3438-28517mg kg-1). Except K, amount forms was...
A fourth-order, three-stage, feedforward cascade sigma-delta modulator (ƩΔM) for CMOS image sensor applications is realized in low leakage, high threshold voltage 65 nm standard process.A top down CAD methodology used the design of building blocks, which involves statistical and simulation optimization at different stages modulator.The multi-bit ƩΔ architecture employs OTA sharing technique with dual integrating scheme first stage gain boosted pseudo-differential class-C inverters as OTAs...