traveling-wave maser
Quick Summary
A maser is a device that amplifies and produces electromagnetic radiation in the microwave range of the spectrum. The name "maser" is an acronym for "microwave amplification by stimulated emission of radiation."12
The first maser was developed by Charles H. Townes. Masers are known for their highly constant and reproducible wavelengths, making them useful for controlling extremely accurate clocks. They have also been used to amplify weak signals from satellites and to measure radio waves from Venus, providing temperature data.1
Solid-state masers, often using crystals like ruby, can amplify a wide band of frequencies and are tunable using magnetic fields. Traveling-wave masers offer a large amplifying bandwidth and easier tuning by guiding waves through a crystal rod within a waveguide. These devices are crucial for amplifying faint signals from distant sources like satellites in radar and communications, and in radio astronomy.1
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