Bora K.,Dhemaji College |
Bezboruah T.,Gauhati University
Lecture Notes in Engineering and Computer Science | Year: 2013
We propose for modeling and software implementation of proportional- integral-derivative controlled higher order phase-locked loop with low settling time acquisitions applicable to frequency modulated transceiver. The implementation has been done by inserting a proportionalintegral- derivative control block into the phase-locked loop during acquisition, where originally the output frequency/phase is controlled by a low pass loop filter. Simulation results show that the method can reduce the settling time up to 94%, 49% and 18% for 2nd, 3rd and 4th order phaselocked loop up to a frequency range of 0.9GHz.
Neog D.K.,Dhemaji College |
Devi R.,Dhemaji College
Microwave and Optical Technology Letters | Year: 2010
A generalized method is presented to determine the resonant frequency ofslot-loaded rectangular microstrip patch antenna by equating its area to an equivalent area ofa rectangular microstrip patch antenna. The computed results are in good agreement with the reported simulated and measured results. © 2009 Wiley Periodicals, Inc.
Neog D.Kr.,Dhemaji College |
Devi R.,Dhemaji College
2010 International Conference on Computer Information Systems and Industrial Management Applications, CISIM 2010 | Year: 2010
A new method for calculation of band width with optimized length and width of rectangular microstrip antenna using Clonal selection algorithm (CSA) is presented in this paper. The result obtained using CSA are compared with the experimental findings and with the simulation results obtained using method of moment based IE3D software from Zealand Inc., USA. The CSA based calculated results are in good agreement. ©2010 IEEE.
Bora H.K.,Dhemaji College |
Neog D.K.,Dhemaji College
2013 IEEE Applied Electromagnetics Conference, AEMC 2013 | Year: 2013
A printed quad band microstrip antenna is presented in this paper. The proposed microstrip-fed antenna consists of a circular ring connected to a slotted square with two arc shaped arms operates in the 1990 MHz Personal Communication System(PCS) band, 3.5/5.5 GHz worldwide interoperability for microwave access (WiMAX) bands, 6-7 GHz Satellite communication bands. The antenna has dimensions of 38×25×1.59 mm3. The proposed antenna is simulated with HFSS software and achieved good impedance bandwidth, directional radiation pattern and improved peak gain in the all four operating frequency bands. © 2013 IEEE.
Sharma U.K.,Dhemaji College |
Pegu S.,Dhemaji College
Journal of Ethnobiology and Ethnomedicine | Year: 2011
Assam is very rich in plant biodiversity as well as in ethnic diversity and has a great traditional knowledge base in plant resources. It is inhabited by the largest number of tribes and they lead an intricate life totally dependent on forest plants. The Mising is the major section and second largest tribal community of Assam and have a rich tradition of religion and culture. Their religious practices and beliefs are based on supernaturalism. A study of the plants related to magico religious beliefs in Dobur Uie of Mising is carried out. The results revealed the use of 30 plants belonging to 23 families. All plant species are used both in religious purpose as well as in the treatment of different ailments. Details of the uses of plants and conservational practices employed in Dobur Uie are provided. Our findings on the use of plants in Dobur Uie ritual reflect that some plants are facing problems for survival and they need urgent conservation before their elimination. Because this elimination may threat the rich tradition of Mising culture. Most of the plants that are domesticated for different rituals are almost same in all Mising populated areas. © 2011 Sharma and Pegu; licensee BioMed Central Ltd.