The unlicensed 2.4 GHz ISM-band, which includes frequencies from 2.4 GHz to 2.5 GHz, is used by a variety of communication applications. In the following the spectral communication characteristics of Bluetooth, a Microwave oven as well as WLAN are depicted.
To get an overview of the spectral characteristics the power spectral density (PSD) as well as a spectrogramm of the 2.4 GHz band can be plotted for different constellations of the mentioned applications.
The PSD is calculated by Welch's method, using a 256 FFT window size of the discretisized frequency values. For calculations of the spectrogramm you have the posibillity to choose from FFT window sizes between 128 and 4096.

You can choose between following scenarios:
1. 20 MHz WLAN signal at channel 5 (2.432 GHz)
2. Two separated 20 MHz WLAN signals at channel 5 (2.432 GHz) and channel 11 (2.462 GHz)
3. Bluetooth signals
4. Exiting radiation of a Microwave oven, which is resonant at ca. 2.465 GHz
5. 20 MHz WLAN signal at channel 5 (2.432 GHz) plus Bluetooth signals
6. Two separated 20 MHz WLAN signals at channel 5 (2.432 GHz) and channel 11 (2.462 GHz) plus Bluetooth signals
7. Exiting radiation of a Microwave oven plus 20 MHz WLAN signal at channel 5 (2.432 GHz)
8. Combined view of Bluetooth signals, exiting radiation of a Microwave oven as well as a 20 MHz WLAN signal at channel 5 (2.432 GHz)