Downconverting mixers are not a specific brand but a category of electronic components used in RF (Radio Frequency) and microwave applications. These devices are produced by various companies worldwide, including prominent manufacturers like Mini-Circuits (USA), Analog Devices (USA), and Marki Microwave (USA). Downconverting mixers are essential in industries such as telecommunications, aerospace, defense, and test & measurement. Their primary function is to convert high-frequency signals to lower frequencies for easier processing, often found in radar systems, satellite communications, and wireless infrastructure. Key products include double-balanced mixers, image-reject mixers, and subharmonic mixers, designed for high performance and reliability in demanding environments.