Microstrip patch antennas (MPA) have been widely used for many years due to their inherent advantages In terms of their inherent advantages in terms of low cost, small size, easy integration, and low-profile characteristics. MPA is genrally used in modern communication devices. But inherently it has narrow bandwidth. So to enhance bandwidth various techniques are used. In this review paper the researchers will be enhance the bandwidth by be using dimensionally invariance resonance frequency (DIResF) method and using different techniques like using slots in the patch by changing height, dielectric constant and feed point.