Abstract: In this paper presents, a dual band Microstrip patch array antenna for both Multi Input Multi Output (MIMO) 4G Long-Term Evolution (LTE) and WiMax application. The Design, simulation and optimization processes are carried out with the aid of Agilent ADS momentum technique. The designed array antenna operates at 2.2 GHz and 3.6 GHz bands for 4G LTE and WiMax systems respectively. Rectangular patch antenna constructed using FR-4 substrate material with єr = 4.4 and h = 3.1 mm. U-shape slot is provided to obtain dual-band characteristics. Substrate losses are also taken into account during simulation process. The proposed array may be used as a template to form larger array in order to achieve high profile antenna system.

Keyword: Micro strip Antenna, U slot, MIMO, WiMax, Dual Band.
Title: An Efficient U-Slotted Patch-Antenna Array for Mimo Systems
Author: P. Sakthivel, C. Poorana kumari
International Journal of Novel Research in Electronics and Communication
Novelty Journals

Abstract:  In this paper, a new Bio-inspired algorithm, simulating annealing based krill herd algorithm (SAKHA) is proposed for solving reactive power dispatch problem. The krill herd (KH) algorithm is based on the imitation of the herd behavior of krill individuals. The least distance of each individual krill from food and from highest density of the herd are considered as the main task for the krill movement. A new krill Pick (KP) operator is used to purify krill performance when revising krill’s position so as to augment its reliability and robustness dealing with optimization problems. In addition, a class of elitism system is used to save the best individuals in the population in the procedure of the krill updating. The proposed (SAKHA) algorithm has been tested on standard IEEE 57 bus test system and simulation results shows clearly about the high-quality performance of the proposed algorithm in tumbling the real power loss.

Keywords: Optimal Reactive Power, Transmission loss, Krill herd, simulated annealing, Bio-inspired algorithm.
Title: Reduction of Active Power Loss and Improvement of Voltage Profile Index by Using Simulating Annealing Based Krill Herd Algorithm
Author: Mr.K.Lenin, Dr.B.Ravindhranath Reddy, Dr.M.Surya Kalavathi
International Journal of Novel Research in Electronics and Communication
Novelty Journals

Abstract: in this paper, a new improved biogeography algorithm (iba) is proposed to solve optimal reactive power dispatch problem.Biogeography technique based on opposition-based learning (obl)is utilized to solve the optimal reactive power problem.Biogeography is a new global optimization algorithm based on the biogeography theory, which is the study of distribution of species.The idea behind obl is the concurrent consideration of an estimate and its corresponding opposite estimate in order to accomplish a better approximation for the current candidate solution.  The proposed iba has been tested in standard ieee 30bus test system and simulation results show clearly the better performance of the proposed algorithm in reducing the real power loss.

Keywords: Opposite numbers,Biogeography algorithm, Opposition-Based Learning, optimal reactive power, Transmission loss.
Title: Abatement of Real Power Loss by Using Improved Biogeography Algorithm
Author: Mr.K.Lenin, Dr.B.Ravindhranath Reddy, Dr.M.Surya Kalavathi
International Journal of Novel Research in Electronics and Communication
Novelty Journals