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Govind Ballabh Pant University of Agriculture and Technology, Pantnagar

After independence, development of the rural sector was considered the primary concern of the Government of India. In 1949, with the appointment of the Radhakrishnan University Education Commission, imparting of agricultural education through the setting up of rural universities became the focal point. Later, in 1954 an Indo-American team led by Dr. K.R. Damle, the Vice-President of ICAR, was constituted that arrived at the idea of establishing a Rural University on the land-grant pattern of USA. As a consequence a contract between the Government of India, the Technical Cooperation Mission and some land-grant universities of USA, was signed to promote agricultural education in the country. The US universities included the universities of Tennessee, the Ohio State University, the Kansas State University, The University of Illinois, the Pennsylvania State University and the University of Missouri. The task of assisting Uttar Pradesh in establishing an agricultural university was assigned to the University of Illinois which signed a contract in 1959 to establish an agricultural University in the State. Dean, H.W. Hannah, of the University of Illinois prepared a blueprint for a Rural University to be set up at the Tarai State Farm in the district Nainital, UP. In the initial stage the University of Illinois also offered the services of its scientists and teachers. Thus, in 1960, the first agricultural university of India, UP Agricultural University, came into being by an Act of legislation, UP Act XI-V of 1958. The Act was later amended under UP Universities Re-enactment and Amendment Act 1972 and the University was rechristened as Govind Ballabh Pant University of Agriculture and Technology keeping in view the contributions of Pt. Govind Ballabh Pant, the then Chief Minister of UP. The University was dedicated to the Nation by the first Prime Minister of India Pt Jawaharlal Nehru on 17 November 1960. The G.B. Pant University is a symbol of successful partnership between India and the United States. The establishment of this university brought about a revolution in agricultural education, research and extension. It paved the way for setting up of 31 other agricultural universities in the country.

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  • ThesisItemOpen Access
    A comparative study of digital integrators and application in designing of discrete filters for high speed control systems
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2013-08) Rastogi, Rohitashwa; Paras
    In the modern age of Information technology, the digital communication has a very important role. In the digital communication system to process on the discrete signals we require the discrete control systems. Digital filters are the main part of such discrete control systems. Digital filters are those electronic circuits whose gain is a function of input frequency. The frequency range for which the gain is large is called the pass band. In fact the filters are used to filter-out the desired frequencies in transmitters and receivers. The IIR filters can be designed by various methods. In modern digital communication system those filters are required whose magnitude plot is flat and it does not have any resonance peak. To design such filters the study of digital differentiators and integrators has been done and their response and deviation from the ideal differentiators and integrators is calculated. By studying different types of differentiators and applied to the low pass filter’s, high pass filter’s prototype with application of respective mathematical constraint for flat and resonance peak less magnitude response. This generated the different digital filters for different differentiators. The digital filters designed hence, compared with the analog filter for the settling time and it is observed that the Backward Euler method generates the fast settling digital filters out of all methods. By studying and analyzing the different descretization methods, it is concluded that a Backward Euler method can generate the digital filters with flat magnitude response for high speed control systems applications.
  • ThesisItemOpen Access
    Compact multiband monopole antenna for wireless applications
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2013-07) Raghuvanshi, Anoop; Gangwar, R.P.S.
    In modern wireless communication there is a huge demand of an antenna which will operate for a wide band of frequency and can simultaneously handle various wireless services. Monopole microstrip patch antennas present really appealing features like simple structure, small size and low cost. They offer a wide band of frequency and hence a prominent option for the proposed antenna designing. The structural configuration of the proposed monopole antenna design has an F-shaped slot on one side of the ground plane and a pair of rectangular and circular slot on the upper patch. The antenna is made on RT/Duroid 5880 substrate with a dielectric constant of 2.2, loss tangent of 0.0009 and a height of the substrate is only 1 mm. The actual size of the proposed antenna is only 20 ×24 ×1 mm3 and it is feed by a coaxial probe feed. After simulation three bands with a centre frequency of 3.44 GHz, 5.28 GHz and 7.12 GHz are obtained. The return loss at these resonant frequencies is -32 dB, 24 dB, and -20 dB which show a very good impedance matching. The proposed design overcomes the narrowband limitation of the patch antenna by offering a wide bandwidth of 172, 1758 and 601 MHz with an efficiency of 86%, 85% and 78%. The proposed antenna has been designed and simulated by using IE3D software and Transmission Line Model in the frequency range of 2 to 8 GHz. The performance parameters of compact multiband monopole antenna for wireless applications are improved as compared with the quoted reference antenna. The wireless applications supported by the proposed compact multiband monopole antenna are WLAN 5.8 (5.725-5.825 GHz), WiMAX 5.5 (5.25-5.85 GHz), Wi-Fi (5-6 GHz), HIPERLAN/2 (5.725-5.825 GHz), Cordless phones (5 GHz), IMT (4.4-4.9 GHz), Fixed wireless (5 GHz).
  • ThesisItemOpen Access
    Design of second order sigma delta modulator using preamplifier latch based comparator in 180 nm CMOS technology
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2015-07) Farswan, Manoj Singh; Tomar, Abhishek
    Sigma Delta Modulator (SDM) is achieving attention due to its low cost, high resolution, high signal to noise ratio etc in analog to digital converter. In SDM, the oversampling frequency is used to achieve high resolution. Also, noise shaping is inherently done to reduce noise power. The noise power in the design of SDM can be further reduced by increasing the order of the SDM. In this thesis, a second order continuous time, upto 50 kHz, SDM is designed with 1.8 V supply voltage in 180nm CMOS technology. The blocks used in SDM like integrator, subtractor and gain stages are implemented using Operational Amplifier (Op-amp) which is designed in cascade topology with miller capacitance techniques to optimize the phase margin and gain. The designed Op-amp has gain of 59.302 dB, phase margin of 59.2° and Gain Bandwidth (GBW) of 114.6 MHz. Integrator has -20 dB/decade slope for 11.12 kHz to 10.62 MHz which decides the sampling frequency of 3.2MHz. The preamplifier based latch comparator is used as a final stage of SDM. The designed preamplifier has 18.167 dB gain and 779.77 MHz 3-dB frequency which amplify low amplitude signal. The designed comparator is able to differentiate the 50uV signal and the sampling frequency is 64 MHz. The simulation is done in Cadence Virtuoso tool.With an input signal of 50 kHz and 3.2MHz clock frequency, the SNDR is 59.2 dB and power dissipation is 8.7mW of the SDM.
  • ThesisItemOpen Access
    Design of high frequency quadrature output ring oscillator in 0.18 µm CMOS process
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2017-07) Bohra, Meenu; Tomar, Abhishek
    Oscillation frequency, frequency tuning, phase noise and power dissipation are the important parameters in designing any ring VCO with the contemporary sub-micron technologies. The oscillation frequency, frequency tuning, phase noise and power dissipation are still not up to the mark so that ring oscillator can be used in RF application. Various designs had been developed by using effective topologies for reducing power dissipation and phase noise and improving oscillation frequency and frequency tuning. In this thesis, a novel design of ring VCO has been proposed and implemented in TSMC 0.18 µm CMOS technology. The proposed novel design is compared with the earlier proposed designs in 0.18 µm CMOS technology for oscillation frequency, frequency tuning, phase noise and power dissipation. The simulation is done using Cadence EDA tool. The simulated results shows phase noise of the proposed ring VCO equal to -102.9 dBc/Hz at a frequency offset of 1 MHz from a center frequency of 2.61 GHz. The measured power dissipation of the circuit is 25.27 mW. The tuning range of the proposed ring VCO is from 2.61 GHz to 0.2 GHz for a tuning voltage from 0 V to 1.2 V. The layout is drawn and post layout simulation is done which verifies the pre layout results.
  • ThesisItemOpen Access
    Design of 2-6 GHz Flat Gain CMOS LNA for WiMAX applications
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2017-07) Varshney, Swati; Tomar, Abhishek
    Radio Frequency signal transmission via wireless technologies is becoming a major method of communication in modern age. But the signal obtained after reception is often corrupted with noise. So, to suppress noise the received signal need to be processed. LNA plays an important role in determining the receiver performance because it is used to amplify the very small signal coming from antenna while adding as little noise and distortion as possible. The main focus of this thesis is to design a Low Noise Amplifier having flat gain for the frequency range of 2-6 GHz. A novel architecture of current reuse LNA with resistive feedback and inductive source degeneration is proposed. Current reuse structure is used to reduce the power consumption and resistive feedback along with inductive source degeneration topology is used for input matching. The input and output matching is better for maximum signal transfer. 0.18 µm TSMC CMOS technology is used for designing the proposed LNA and cadence virtuoso software is used to simulate the schematic of LNA. Simulation shows that the proposed LNA has achieved flat gain, better input & output matching, good isolation and better stability. Amplifier has 15.4 dB gain with 0.3 dB variation, input return loss less than 12.4 dB, output return loss less than -17.4 dB, reverse isolation less than -48.33 dB and noise figure less than 5.2 dB. It exhibit 1-dB compression point -21.86 dBm and third order input intercept point-9.93 dBm at 4 GHz frequency respectively. The circuit draws 21.95 mW from 1.8 V supply voltage.
  • ThesisItemOpen Access
    A comprehensive study on MOSFET, nanowire FET and CNTFET for impact of gate dielectric on gate capacitance
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2015-12) Tiwari, Manas; Sharma, K.K.
  • ThesisItemOpen Access
    A comprehensive study of imact of contact materials on characteristics of carbon nanotube field effect transfer
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2016-01) Kohli, Vinod Chandra; Sharma, K.K.
  • ThesisItemOpen Access
    Reconstruction of motion blurred image using wavelet transform and neural committee machine
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2016-08) Agarwal, Saitu; Mathur, Sanjay
    Image Restoration is the process of obtaining the original image by using the knowledge of the degrading factors. Degradation comes in many forms such as blur, noise, and camera shake. One of the disadvantages of existing method is that some methods make restrictive assumptions on the Point Spread Function or the true image that limits the algorithm's portability to different applications in conventional approach; deblurring filters are applied on the degraded images without the knowledge of blur and its effectiveness. The proposed algorithm is used for the reconstruction of motion blurred images. Two factors which mainly affect an image are length of blur and angle of blur. In this thesis, concept of Wavelet decomposition and neural committee machines are applied for restoring problems in which images are degraded by blur function and corrupted by noise. In the first step of reconstruction, blurred image is decomposed using wavelet transform based on multi resolution analysis and then correlation analysis is performed to reduce the dimensionality of image pattern space and in the next step a multi layer feed forward neural network based on ensemble averaging technique is used to estimate the parameter which causes blurring. The proposed methodology uses highly non linear back propagation neuron for image restoration to get a high quality of restored image. The estimated parameters are used to calculate the value of degradation factor corresponding to blurred image and then deconvolution is performed to get the original image. Results show that the images restored using the proposed method have mean square error in the range of 0.001-.005 and peak signal to noise ratio in the range of 69dB-75dB.
  • ThesisItemOpen Access
    Multiband metamaterial antenna with omega shaped SRR structure for wireless communication
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2016-07) Santosh Kumar; Paras
    Metamaterial as a special type of structure using natural electromagnetic material having EM properties can be very useful in different fields. It can play crucial role in communication field and can provide multiband characteristics with wider bandwidth and high gain as required in all field of RF communication on very small sized structures. The proposed antenna has been designed by using TLM equations that calculate the rectangular patch of size 40x40 mm2 having resonant frequency of 5 GHz and on the 1.58 mm height of substrate. The substrate material used is FR4 which is having a permittivity of 4.4 and loss tangent of 0.02. To enhance the performance, the rectangular patch has been changed to the circular patch that has radius of 7 mm at a substrate height of 1.58 mm and also size of the proposed antenna is reduced to 24.5x30mm2. The proposed antenna has a combination of conducting wire and omega shaped SRR structure to obtain metamaterial characteristics. The inter-digital structure of hexagon SRR has been used to achieve the negative permittivity and closed ring resonator to achieve the negative permeability and hence the combined structure can achieve the resonance in desired frequency band. The proposed antenna is simulated on HFSS software. Simulation results show that there are wide ranges of multi-bands from 1.4-7.6GHz, 9-11.4GHz, 11.6-15.25GHz and 15.5-17.6GHz and corresponding bandwidths are 6.2GHz, 2.4GHz, 3.65GHz and 2.1GHz respectively. The average gain of near 7.0 dB has been achieved. Proposed antenna is fabricated using lithography process. Its parameters have been tested on PNA. Radiation pattern is measured in an anechoic chamber. There is a good agreement between the simulated and fabricated results. The proposed antenna is reduced in size, having multiple bands with higher bandwidth as compare to previously fabricated antenna. The proposed antenna has application in Wi-MAX, WLAN, satellite communication, radar communication, space vehicles etc.