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Using mechanical or electronic means, a variable capacitor may purposefully and repeatedly modify its capacitance.
Variable capacitors are frequently used in L/C circuits to set the resonance frequency, such as when tuning a radio (therefore, they are sometimes known as tuning capacitors or tuning condensers), or as a variable reactance, such as in antenna tuners for impedance matching.
A variable capacitor typically consists of two insulated sets of pole plates: a stator, which is a stationary set of pole plates, and a rotor, which is a moving set of pole plates. Coaxial variable capacitors can be created by combining the rotors of multiple variable capacitors on one shaft (commonly known as double, triple, etc.). Long handles on variable capacitors can be turned by pulling cables or dials.
The global variable capacitor market accounted for $XX Billion in 2021 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2022 to 2030.
New NFC variable capacitor (LXR 19 201-058) from Murata Manufacturing Co., Ltd. offers better voltage resistance capabilities. The primary use of this device is in card readers with an NFC function POS systems.
With capacitance values ranging from 2 to 4,700 picofarads, MACOM will release a wide range of capacitor values in three distinct voltage categories: 200V, 500V, and 1,000V.
When compared to Tantalum or MLCC (multi-layer co-fired ceramic) technologies, the primary technical features are compact size, extremely stable temperature and voltage performance, low ESR and ESL, high Q, and better reliability.
The COMSOL, trimmer capacitors produced. Utilizing parallel facing electrodes with a changeable overlap area is one method of achieving this. In this case, changing the capacitance involves twisting one electrode with a screwdriver. A linear angular reaction is typically sought.
In high frequency applications, such as for frequency tuning of RF and microwave filters, trimmer capacitors are frequently used.