Metamaterials have shown an enormous amount of success in the field of engineering as well as in physics and finds applications in various domains. One such important application of metamaterials i.e., Zeroth Order Resonator (ZOR) antennas is discussed in this article. Metamaterials are manmade materials having properties not found in nature occurring materials i.e., simultaneously negative permittivity (ε) and permeability (μ) over certain range of frequency. Due to these unique properties, metamaterials are used in various antennas to enhance the bandwidth, gain, polarization, radiation patterns etc. The omnidirection radiation pattern is obtained by using ZOR antennas, which is one of the important applications of Composite Right/Left-Handed Transmission Line (CRLH-TL). CRLH-TL uses the properties of metamaterial having exotic properties. This article presents a brief introduction to metamaterials followed by detailed discussion about CRLH-TL and various ZOR Antennas along with their properties. Eventually the applications and radiation patterns have also been studied in this report which will give the researchers an analysis of the research that has already been published.