1. Radio astronomers use different techniques to observe objects in the radio spectrum . 2. People a lot of times are using radio spectrum without realizing it, 3. Half of the radio spectrum is reserved for the federal government's use. 4. It works on a different part of the radio spectrum than cellular service. 5. For instance, it is a fact that Wi-Fi networks use unlicensed radio spectrum . 6. The protocol works in the 2.4-gigahertz part of the radio spectrum . 7. These deals give us the radio spectrum , and you need spectrum to compete. 8. It subsequently bought radio spectrum from the government and an Internet access company. 9. Much of the focus is on the 2.4-gigahertz band of the radio spectrum . 10. He discusses particularly the regulation of the radio spectrum in the United States.