Homemade air variable capacitor
What is an air variable capacitor? In some applications, a capacitor is required to provide a variable capacitance value. Variable capacitors are used in such cases. They allow the capacitance value to be changed repeatedly mechanically and electronically. Air variable capacitors use air as a dielectric and are composed of two sets of metal sheets, one of which is fixed and the other can be rotated. The metal plates are arranged in a network. The overlap between the two sets of metal plates can be adjusted by rotating the moving plate, and the capacitance changes accordingly. But the air gap remains the same. Application of air variable capacitor Due to its simple design and powerful functions, air variable capacitors are widely used. Its most important use is in the radiofrequency field, for example, to tune a radio by setting a resonance frequency. They are also important components of radiofrequency matching networks, magnetic resonance imaging (MRI) equipment, and precision