TUNABLE INTERDIGITATED CAPACITOR

摘要

A tunable capacitor implemented as interdigitated arrays of finger elements arranged so that the spacing between finger arrays may be adjusted. The design has a number of advantages including high capacitance for a given circuit area, small area for a given desired capacitance, mechanical stability, high self resonance frequency, and high quality factor.

主权项

1. A variable capacitor apparatus comprising:
a first terminal section comprising a first main body portion with a first set of two or more fingers extending from the first main body; a second terminal section comprising a second main body portion with a second set of two or more fingers extending from the second main body; at least some of the fingers of the first and second terminal sections each arranged in a respective array and; a support, for supporting the first terminal section and second terminal section in a position with respect to one another such that at least some of the first set of fingers and at least some of the fingers of the second set of fingers are interposed between one another and for maintaining a space between the fingers of the respective first and second set of fingers; and a controller, arranged to control a distance between the first and second set of fingers, and to thereby effect a chance in capacitance of the apparatus.