Yeshwantrao Chavan College of Engineering

About: Yeshwantrao Chavan College of Engineering is a based out in . It is known for research contribution in the topics: Inverter & Microstrip antenna. The organization has 632 authors who have published 586 publications receiving 4037 citations.

Seismic Response Control of Unsymmetrical RCC Framed Building Using Base Isolation Considering Soil Structure Interaction

Abstract: In passive energy dissipation systems used for earthquake resistant structures, base isolation is one of the most powerful systems. For understanding the effect of base isolation system, G + 5 storey models are considered with planner asymmetry. Lead rubber isolator is used for controlling the response of building during earthquake effects and tremors. The paper deals with behavior of fixed base and isolated building in terms of natural time period, top floor acceleration, storey drift, base reaction and energy dissipation. The Non-linear Time history analysis has been performed by using FEM based software SAP2000. The paper also includes the effect of soil structure interaction on both fixed base and isolated base building. It was observed that with use of isolators, time period of structure becomes double as compared with the fixed base model. The soil parameters also plays vital role in performance of isolators.

A 4-shaped MIMO antenna for WLAN application

Abstract: A 2×1 compact 4-shaped multiple-input-multiple-output (MIMO) antenna is designed by using DGS and parasitic element. A defected ground plane structure (DGS) etched into the ground plane so that mutual coupling effect between two antennas is reduced. F-shaped parasitic elements add at corner to increase isolation rate. It covers two frequency bands, lower frequency band is 2440MHz–2560MHz and higher band covered frequency ranges from 5120MHz–5260MHz. The antenna has isolation of about −14.84dB at lower band and −20.9 at higher band. The measured peak gains of two antennas are 1.4dBi and 2.8dBi at 2.5GHz and 5.2 GHz. The proposed MIMO antenna system has a bandwidth which covers the 2.4G-WLAN applications.

Calibration of filter paper for measuring total soil suction

Abstract: Calibration curve plays an important role in filter paper method because it affects accuracy in soil suction values. Osmotic coefficient and relative humidity govern the osmotic suction required to develop calibration curve and equation. Most of the researchers used the readily available total (osmotic) suction values from various studies to develop the calibration curve. Very few researchers used the osmotic coefficient in calibration and studied its effect on calibration and measuring suction. In this paper, the effect of the osmotic suction proposed by various researchers on calibration of Whatman 42 Filter paper was studied. Logarithmic and exponential calibration equations were developed and compared. The NaCl solution used in the present study provides limited total suction range of 0–30,000 kPa. The total suction of clayey soil was measured to validate the calibration curves proposed in this study. The feasibility of proposed osmotic coefficients is verified by measuring total suction of soil. The total suction estimated from calibration curve using osmotic coefficients was found to be more accurate.

Design of high frequency phase locked loop

Abstract: A digital phase-locked loop (DPLL) is designed using 0.18 mm CMOS process and a 3.3 V power supply. It operates in the frequency range 200 MHz-1 GHz. The DPLL operation includes two stages: (i) a novel coarse-tuning stage based on a flash algorithm, and (ii) a fine-tuning stage similar to conventional DPLLs. The flash portion of the DPLL is made up of frequency comparators, an encoder and a decoder which drives a multiple charge pump (CP)/low pass filter (LPF) combination. Design considerations of the flash DPLL circuit components as well as implementation using Tanner design tools are presented. Spectra simulations were also performed and demonstrated a significant improvement in the lock time of the flash DPLL as compared to the conventional DPLL.

A Wideband Slot Antenna with Simple Structure

Abstract: A circularly polarized slot antenna with simple structure and wideband performance is proposed in this paper. It has one cross-shaped main radiating slot, two parasitic slots placed above and below the cross-shaped slot. The length of main radiating slot is about 1-lambda for wideband performance. The simulation results including S 11 , radiation pattern, gain are depicted and illustrated. Simulation results of various changes in length of mainradiating slot of proposed antenna has been portrayed. The peak gain of more than 5.0 dBi is achieved with the operating bandwidth from 3.6 to 5.6 GHz for length of 43mm of mainradiating slot. Moreover, operating bandwidth of around, 3.4 to 4.51 GHz, 3.8 to 6.13 GHz, 4.2 to 6.5 GHz is achieved for main-radiating length of 47mm, 39mm and 35mm respectively. Proposed antenna can be used for various applications like WLAN, Wi-Fi, Wi-MAX, 5G, Radar and Satellite communication.