Microstrip antennas are a class of planar antennas which have been researched and developed extensively in the last four decades. Due to their numerous advantages such as simple design, possible compact design, and lower cost, microstrip antennas are widely used in different fields of science and technology. As the size of these antennas directly depends on its resonance frequency wavelength, microstrip antenna is a popular choice for ultrahigh-frequency applications. In this chapter, a brief overview on microstrip antenna and its performance and design parameters is provided. A state-of-the-art literature review is also included to have an overall idea of the recent developments in this area and what to expect in the future.