Patent ID: 9484880
Filing Date: 2016-11-01
CPC Classification: H01G,H03H

Claim Text:
1. An impedance matching device comprising: a substrate; a variable device unit mounted on the substrate and including at least one MEMS variable capacitor to change a capacitance value according to applied voltage; a fixed device unit mounted on the substrate and including at least one inductor coupled with the MEMS variable capacitor to form a predetermined time constant; a reflective power measurement unit mounted on the substrate to measure an intensity of a reflective wave of a signal transmitted from the variable device unit and the fixed device unit; and a converting unit mounted on the substrate to output a direct current voltage value by converting the intensity of the reflective wave of the signal measured by the reflective power measurement unit into the direct current voltage value; wherein the MEMS variable capacitor comprises: wherein a first insulating layer is formed on the first electrode to inhibit an electrical short between the first electrode and the second electrode, and a second insulating layer is formed on the fixed electrode to inhibit an electrical short between the fixed electrode and the movable electrode.