Variable capacitance element, packaged circuit, resonant circuit, communication apparatus, communication system, wireless charging system, power supply apparatus, and electronic apparatus

摘要

The present provides a variable capacitance element enabling a further reduction in capacitance variation among variable capacitance elements, and provides a packaged circuit including the variable capacitance element. A variable capacitance element is configured to include an element body unit, a compensation unit, a first external terminal for signals, a second external terminal for signals, external terminals for control, and external terminals for capacitance compensation. The compensation unit has second variable-capacitance capacitor units C9 to C 11, each including a second dielectric layer formed of a ferroelectric material, and is connected to the element body unit, and has a capacitance varying according to a control voltage signal.