ESJ Technology, established in 2015 and headquartered in Shenzhen, China, is a leading manufacturer of high-performance RF & Microwave components for mission-critical applications. In 2021, we established a branch office in Shanghai, ESJ Microwave Technology Co., Ltd., focusing on high-frequency microwave RF components. Our comprehensive product portfolio includes coaxial fixed attenuators/terminations, power dividers/combiners, directional couplers, RF filters, RF circulators/isolators, RF switches, amplifiers, RF duplexers, RF cable assemblies, RF coaxial adapters, waveguide to coaxial adapters etc.