What is the difference between RF energy and microwave energy other than frequency and wave length?
By submitting your personal information, you agree that TechTarget and its partners may contact you regarding relevant content, products and special offers.
Electromagnetic radiation refers to all electrical and magnetic energy that moves through the air at the speed of light. Radio frequency (RF) refers to a subset of electromagnetic energy, generally transmitted through an antenna, creating waves with a desired frequency and length. Frequency represents the number of waves passing by each second, while length is the distance traveled per second.
As illustrated below, the RF spectrum generally refers to frequencies between 3 kHz and 300 GHz. Microwave commonly refers to the subset of the RF spectrum with wavelengths shorter than 30 cm and frequencies above 1 GHz.
Microwave ovens, wireless access points, and TV broadcasters all generate RF energy. For example, Wi-Fi devices use frequencies within the ISM (Industrial Scientific and Medical) and/or UNII (Unlicensed National Information Infrastructure) band. The ISM band used by 802.11b/g/n starts at 2.4 GHz and is divided into 11 unique channels. Many other consumer electronic devices transmit within the ISM band, including cordless telephones, Bluetooth peripherals, baby monitors – and microwave ovens.
More on spectrum analyzers
To learn more about RF frequencies and devices that use them, see Lisa's tip on troubleshooting with spectrum analyzers.
Microwave ovens generate RF energy at a frequency of 2.45 GHz, using a magnetron to convert electrical energy into radio waves that bounce around inside the oven to heat food. Microwave ovens are designed to contain those radio waves, but it is possible for some leakage to occur, especially in older ovens. This is why microwave ovens can degrade nearby Wi-Fi performance -- any RF leakage that occurs competes for frequencies used by many 802.11b/g/n access points.
Note that "microwave" and "microwave oven" are not synonymous. Microwave ovens generate microwaves, but not all microwaves are generated by ovens.
Dig Deeper on Troubleshooting Wireless Networks
Related Q&A from Lisa Phifer
Learn the difference between a site-to-site VPN and a remote-access VPN, as well as the protocols used for each one.continue reading
Need to send an email, check your flight's status or get ready for a presentation? You can do it all on your smartwatch, thanks to a slew of Apple ...continue reading
New and improved management features have made Android devices more suitable for enterprise use, and API and EMM tools can streamline the device ...continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.