Abstract
The number of wireless electronic gadgets used in mobile communication, vehicle collision avoidance system, compact radars, etc. is extremely increasing at a rapid rate. Thus, the characteristics of the antennas involved in these gadgets are to be designed very stringently so as to avoid interferences & coupling and to improve compatibility, susceptibility, etc. Compact smart antenna with improved performance is highly essential to meet this challenging scenario. Mutual coupling between various elements of an array is one of the main factors which can be considered for improvement of performance of the antenna. Influence of mutual coupling on performance of the antenna is considered in this paper and various techniques to minimize this effect are presented. Effect of mutual coupling on radiation characteristics of the antenna can be compensated employing various methods like Conventional Mutual Impedance (CMI), Receiving Mutual Impedance (RMI). Analysis is presented as comparison between the two methods for different number of elements in the array. Analysis is also presented for different geometries of the array like circular and elliptical for improved performance. The results show performance improvement in the proposed array for parameters like SNR and Speed of convergence.
Highlights
IntroductionHow to cite this paper: Rao, A.V.L.N., Ankaiah, N.B. and Cheruku, D.R. (2016) Antenna Performance Improvement in Elliptical Array Using Receiving Mutual Impedance (RMI) Method of Mutual Coupling Compensation
Wide spread application of wireless communication technology in daily life demands efficient and reliable sig-How to cite this paper: Rao, A.V.L.N., Ankaiah, N.B. and Cheruku, D.R. (2016) Antenna Performance Improvement in Elliptical Array Using Receiving Mutual Impedance (RMI) Method of Mutual Coupling Compensation
The objective is to analyze the response of elliptical antenna array with modified LMS (Least Mean Square) algorithm which optimizes the weight factor for DOA (Direction of Arrival) estimation
Summary
How to cite this paper: Rao, A.V.L.N., Ankaiah, N.B. and Cheruku, D.R. (2016) Antenna Performance Improvement in Elliptical Array Using RMI Method of Mutual Coupling Compensation. (2016) Antenna Performance Improvement in Elliptical Array Using RMI Method of Mutual Coupling Compensation. Array of elements are designed to achieve required beam form for a given application. Two methods to increase the aperture size of the array are to increase the number of elements and/or inter element spacing of the array [3]. Computational complexity increases with the number of elements. This leads to increase in grating lobes. Induced current on the antenna element reradiates electromagnetic field which would be received by the other neighboring elements in the array. Such mutual coupling effect is usually considered as a defect which degrades the performance of the array. Two types of coupling compensation methods: Conventional Mutual Impedance (CMI) and Receiving Mutual Impedance (RMI) methods are popular
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