Microstrip patch antenna is a scientific field of research that has opened the door to 5G communication and future 6G communication devices. Initially the microstrip patch antenna was designed in rectangular, circular, and triangular shaped and later to improve the antenna parameters, several modifications have been done in the patch structure as well as in the ground plane structure which is basically called its structural improvement/modification. Such modification helped to cover multiband, broadband, and wideband characteristics in the 5G frequency spectrum. Many performance improvement techniques are reviewed and presented in this paper. This paper also covers the necessary improvement of antenna performance parameters while geometric modifications have done.