Due to the increasing use of wireless communication devices such as cell phones and newer applications such as the Internet of Things (IOT) and smart cars, efforts to reduce the size and weight of electrical circuits, which lead to shrinkage of the entire system, are unavoidable, thus it is essential to pay attention to proper antenna design as a key part of all wireless communication systems. Since the desired characteristics of the antenna such as bandwidth and radiation efficiency are directly related to its dimensions and as the dimensions get smaller the antenna performance may be lost, therefore, there are fundamental limitations in antenna miniaturization, which is a major challenge in antenna design and forces the designer to establish a trade-off between design parameters. In this thesis, using structure called ’metamaterial iired’, which consist of a single metamaterial unit cell, an electrically small antenna in 2.4 GHz WiFi band has been designed, simulated and fabricated. The measurement results are in good agreement with theory. The structure of this antenna consists of a planar dipole antenna printed on the FR-4 substrate, which is approximately one-third the length of a half-wave dipole. By placing a specially designed parasitic element in the nearfield region of the dipole, that is, on the other side of the substrate, the whole structure acts as a resonant RLC circuit. Therefore, the impedance matching between the antenna and the source is done without an external matching circuit. Matching is also done between the antenna and the free space, i.e., the desired radiation efficiency is achieved. For this antenna, the fractional bandwidth is about 4%, the radiation efficiency is 86% and the maximum gain is about 1.2 dBi. The radiation pattern of this antenna is monopole-like and has linear polarization. Also, the ka parameter, which is a measure of the electrically small size of the antenna, is equal to 0.74 and because ka 1, it indicates that the antenna is small. Antenna with such features is suitable for various IoT applications, but with slight changes in some parameters, the desired frequency range for the intended application is obtained easily. 1-Electrically Small Antenna 2-Metamaterial 3-Metamaterial Iired 4-Nearfield Resonant Parasitic Element.