Electrically Small Antenna Covered by Two circular Ring Resonators for C, X, K sub(U) band applications

• Published in: International journal of computer science & communication networks Vol. 2; no. 2; p. 152
• Main Authors: Govardhani, I, VenkataNarayana, M, Habibullakhan, Habibullakhan, Rajkamal, K
• Format: Journal Article
• Language: English
• Published: 01.04.2012
• Subjects: Antennas; Bandwidth; Communication networks; Gain; Mathematical analysis; Reflection coefficient; Resonators; Wavelengths
• ISSN: 2249-5789

Electrically small antennas have been an important part of communications engineering since the beginning. The present dissertation deals with electrically small antennas, namely antennas which are no more than(l/10) small compared to the wavelength. An important point regarding electrically small antennas is that their performances are closely related to their electrical size. The product of the bandwidth and the gain is a function of the size of the antenna, so that the gain can only be increased at the expense of the bandwidth, and vice versa. In this paper, I will deal with dual-band electrically small antenna (ESA). The miniaturized radiation structure consists of a small ring and concentric split-ring resonator. The resonant response of the proposed radiation structure is characterized by the coupling among two split-ring resonators and the small ring. This interaction provides an additional capacitance to further reduce the total dimension of the resonant electrical length. In this paper my proposed work to verify the improvements in the gain, return loss, radiation patterns, Field pattern, Axial ratio, reflection coefficient (s11) and efficiency of the electrically small antenna.