Spectrum access refers to the ability of individuals or organizations to access the radio frequency spectrum in order to use wireless communication devices such as cell phones, radios, and Wi-Fi networks. This research area focuses on developing methods and technologies to efficiently allocate and manage the limited radio spectrum to meet the growing demand for wireless services. Researchers in this field study various spectrum access techniques, including dynamic spectrum sharing, cognitive radio, and spectrum sensing, to optimize the use of available spectrum resources. By improving spectrum access, researchers aim to increase the capacity, reliability, and efficiency of wireless communication networks, ultimately leading to better connectivity and faster data transmission for users.