Antenna Performance Improvement in Elliptical Array Using RMI Method of Mutual Coupling Compensation

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.

Side lobe level reduction of thinned concentric elliptical array antenna in vertical and horizontal plane for a desired peak directivity

“…The number of antennas in each ellipse can be obtained as: where d m represents the spacing between the antennas of m‐ th ellipse. The circumference of the ellipse 2 can be written as follows: …”

“…EAA consists of several elements arranged in the form of an ellipse having an equal or unequal spacing between the antennas of the array. 2 Concentric elliptical array antenna (CEAA) is subjected to uniform excitation to obtain a radiation pattern with high directivity but the value of SLL is not satisfactory. To improve the value of SLL while keeping the peak directivity at the desired level or higher, thinning is performed in an antenna array.…”

“…Among various types of array antennas, the radiation pattern of the elliptical array antenna (EAA) inherently covers the entire space. EAA consists of several elements arranged in the form of an ellipse having an equal or unequal spacing between the antennas of the array 2 . Concentric elliptical array antenna (CEAA) is subjected to uniform excitation to obtain a radiation pattern with high directivity but the value of SLL is not satisfactory.…”

Double Port MIMO Antenna for THz Applications using Graphene Patch

“…Currently, the communication industries want antennas to function at a distinct band while being lightweight, inexpensive, and capable of excellent performance. A Microstrip antenna [20] is used to boost the MIMO channel's capacity. It offers a number of benefits low weight, conformal to the surface of objects, low profile, and ease of manufacture.…”

Enhancement gain of broadband elliptical microstrip patch array antenna with mutual coupling for wireless communication

“…The electromagnetic field which must be received by other neighboring elements in the array such mutual conjunction effect the generally seen as a disturbance which retrogrades the implementation of the array. Two kinds of conjunction restitution methods: Conventional Mutual Impedance (CMI) and Receiving Mutual Impedance (RMI) methods are prevalent [8].…”