The application of capacitors.

Communication Industry
Base station equipment: In the RF circuit of a base station, capacitors are used for filtering, coupling, and tuning functions to ensure stable transmission and processing of RF signals. Ceramic capacitors, with their high precision and stability, are commonly used in the RF front-end circuits of base stations.
Communication terminal: In communication terminals such as mobile phones and walkie talkies, capacitors are one of the key components for implementing various circuit functions, used for power management, signal filtering, and storage. For example, tantalum capacitors have the advantages of small size and large capacity, and are commonly used in power circuits for mobile phones.

Transportation field
Electric vehicles: Capacitors are extensively used in key components such as battery management systems, drive motor controllers, and onboard chargers. Thin film capacitors are used in DC/AC inverters for electric vehicles, which can withstand changes in high voltage and high current, ensuring stable operation of the driving motor. Supercapacitors can also be used as auxiliary power sources for the start stop and acceleration processes of electric vehicles, providing instant high current support, reducing the burden on batteries, and extending battery life.
Rail transit: Capacitors are required in the traction system, auxiliary power system, and signal system of subway, high-speed rail, and other rail transit vehicles. For example, in the traction converter of the subway, electrolytic capacitors are used for energy storage and filtering in the DC link to ensure stable AC voltage output from the converter and drive the traction motor to operate.

Aerospace & Defense
Aerospace: Capacitors play a crucial role in the aircraft's avionics, engine control systems, and power systems. Due to the high requirements for equipment reliability, stability, and lightweight in the aerospace industry, high-performance film capacitors and ceramic capacitors are commonly used.
National Defense: Capacitors are indispensable electronic components in military equipment such as radar, missiles, and satellite communications. For example, in the transmitter and receiver of a radar, high-voltage capacitors are used to generate and process high-power RF signals. At the same time, capacitors in military equipment also need to have special properties such as anti electromagnetic interference and anti radiation to adapt to complex battlefield environments.