Miniaturized dual-band metamaterial inspired antenna with modified SRR loading

Abstract

A miniaturized dual‐band CPW‐fed Metamaterial antenna with modified split ring resonator (SRR) loading has been presented in this paper. Proposed antenna comprises a tapered rectangular patch with a slot in which an elliptically SRR has been loaded to achieve miniaturization. Proposed antenna shows dual band operations in the operating band 3.25‐3.42 and 3.83‐6.63 GHz, respectively. It has been observed that lower mode (at 3.36 GHz) is originated by means of modified SRR. SRR is being modified by small meandered line inductor which is placed instead of strip. This provides an extra inductance to SRR resulting miniaturization. Overall electrical size of the proposed antenna is 0.222 × 0.277 × 0.017 λ0 at 3.36 GHz. Second band is due to coupling between feed and ground planes. The antenna offers an average peak gain of 1.72 and 3.41 dB throughout the first and second band respectively. In addition to that this antenna exhibits perfect omnidirectional and dipolar radiation patterns at xz‐ and yz‐ plane respectively. Due to consistent radiation pattern, ease of fabrication, and compact nature this antenna can be used for wireless applications such as worldwide interoperability for microwave access (WiMAX), industrial, scientific and medical (ISM) band, WLAN/Wi‐Fi bands.

CPW fed metamaterial loaded dual‐band roof‐top antenna for vehicular communications

“…This reduction in operating frequency without increasing the antenna footprint is described as antenna miniaturization. The realized frequency reduction and hence the miniaturization is higher than the antennas reported in References 13‐18,22‐27.…”

An electrically small inverted L‐shaped asymmetric coplanar strip‐fed antenna with split‐ring resonator for multiband applications

“…It is an effective technique to reduce the antenna's electrical size. Though the antenna achieves size reduction, it covers 3.5/5 GHz of wireless applications only 27 . A CPW‐fed metamaterial‐inspired antenna is proposed to obtain a wider bandwidth with triple‐band operations.…”

“…However, it does cover only single frequency band. From the above literature survey, it is observed that most of the existing antenna designs have the following issues: large size, narrow bandwidth, gain, ka, and less coverage of applications 22–42 . To address the above issues, a compact antenna design with a rectangular‐shaped split‐ring resonator (RSRR) structure is discussed.…”

Slot antenna miniaturization by loading dumbbell‐shaped slots and strips, square‐shaped loops, and shorting vias

“…One of the main limitations of a slot antenna is that at low microwave frequencies, the antenna size becomes quite large . Nowadays, one primary focus of wireless technology is to make the system and device compact, and in general, an antenna occupies a considerable area of a wireless system compared to other components . To cope with the system and device miniaturization trend, each component needs to be miniaturized, including the antenna.…”