American Journal of Electrical and Electronic Engineering

A fractal is a recursively generated object having a fractional dimension. So many objects, including antennas, can be designed using this recursive nature of a fractal. In this paper we have used the fractal geometry arrangements for the design of planar antenna arrays with low side lobes. Iterated Function System (IFS) is used to generate the sierpinski fractal antenna arrays using circular shapes. CST Microwave Studio EM Simulation software is used for design & simulation of these antenna arrays. Two resonant frequencies like. 1936 GHz &. 222 GHz are achieved. Better performance parameters like return loss, VSWR, directivity, gain, bandwidth enhancement with low SLL are estimated.

American Journal of Electrical and Electronic Engineering. 2014, 2(4), 137-140. DOI: 10.12691/ajeee-2-4-3
Pub. Date: September 17, 2014

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Review of Leakage Power Reduction in CMOS Circuits

by Khushboo Kumari, Arun Agarwal, Jayvrat and Kabita Agarwal

Review Article

Recent Technological advances in Wireless Communication has shown the convergence of terminals and networks that support multimedia and real-time applications. This obviously puts an immense pressure on battery of any mobile device. The CMOS has been the leading technology in today’s world of mobile communication due to its low power consumption. Reduction of leakage power in CMOS has been the research interest for the last couple of years. In CMOS integrated circuit design there is an important trade-off between technology scaling and static power consumption. In today’s CMOS technology the leakage power consumption plays a significant role. As we approaching to nano-scale design the total chip power consumption becomes dependent on leakage power. Increasing the battery life in mobile wireless communication and mobile computing and similar other applications is the topic of research now-a days... Further, since the leakage of battery exists even when devices are in idle state makes leakage power loss most critical in CMOS VLSI circuits. Many techniques have been evolved to tackle the problem and its still in progress. This paper mainly focuses on the review of various works done in this field till today’s date. Further a review of recent work done on a new technique LSSR (Lector Stack State Retention Technique) is discussed in the paper.

American Journal of Electrical and Electronic Engineering. 2014, 2(4), 133-136. DOI: 10.12691/ajeee-2-4-2
Pub. Date: September 05, 2014

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Analysis of a MIMO-OFDM Wireless Communication System Using a Binary Power Control Scheme with Radio Channel Uncertainties

by Santosh M.Tondare and Veeresh G. Kasabegoudar

Original Research

Here a novel binary power control scheme is presented with radio channel uncertainty which includes path loss, Rayleigh fading, shadowing coefficient, and interference from other users to analyse the performance of MIMO-OFDM wireless communication system. From bit error rate (BER) point of view a two tier system with adjacent interference is taken into account to guarantee QoS. The main objective of this system is to optimize energy efficiency with QoS. Taking both energy efficiency and quality of service (QoS) an energy efficient binary power control with BER constraint algorithm is presented. The performance of this system is analyzed and results of the same are presented to show the effectiveness of the system presented.

American Journal of Electrical and Electronic Engineering. 2014, 2(4), 129-132. DOI: 10.12691/ajeee-2-4-1
Pub. Date: August 14, 2014

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