RF VGAs (Radio Frequency Variable Gain Amplifiers) are not a specific brand but a product category used in the electronics and telecommunications industries. These components are designed to amplify signals with adjustable gain, crucial for applications like wireless communication, radar systems, and test equipment. Leading manufacturers of RF VGAs include companies like Analog Devices (USA), Texas Instruments (USA), and Qorvo (USA), which produce high-performance amplifiers for industrial, military, and consumer markets. These devices are widely available through distributors such as Radwell and Grainger, serving sectors requiring precise signal control and low-noise amplification.