![A Rydberg receiver and spectrum analyzer detects a wide range of real-world radio frequency signals above a microwave circuit including AM radio, FM radio, Wi-Fi and Bluetooth Stock Photo - Alamy A Rydberg receiver and spectrum analyzer detects a wide range of real-world radio frequency signals above a microwave circuit including AM radio, FM radio, Wi-Fi and Bluetooth Stock Photo - Alamy](https://c8.alamy.com/comp/2H0E8X1/a-rydberg-receiver-and-spectrum-analyzer-detects-a-wide-range-of-real-world-radio-frequency-signals-above-a-microwave-circuit-including-am-radio-fm-radio-wi-fi-and-bluetooth-2H0E8X1.jpg)
A Rydberg receiver and spectrum analyzer detects a wide range of real-world radio frequency signals above a microwave circuit including AM radio, FM radio, Wi-Fi and Bluetooth Stock Photo - Alamy
![Figure 2.2 from Analysis of the FM Radio Spectrum for Secondary Licensing of Low-Power Short-Range Cognitive Internet of Things Devices | Semantic Scholar Figure 2.2 from Analysis of the FM Radio Spectrum for Secondary Licensing of Low-Power Short-Range Cognitive Internet of Things Devices | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/2537b9cd449ec0d9c4405039fe051b4fa74b3b84/35-Figure2.2-1.png)
Figure 2.2 from Analysis of the FM Radio Spectrum for Secondary Licensing of Low-Power Short-Range Cognitive Internet of Things Devices | Semantic Scholar
![software defined radio - What are the 3 or 5 peaks in an FM broadcast during silence? - Amateur Radio Stack Exchange software defined radio - What are the 3 or 5 peaks in an FM broadcast during silence? - Amateur Radio Stack Exchange](https://i.stack.imgur.com/GyOr8.png)