| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a wide band capacitance element which increases an upper limit of a usable frequency of a capacitive component to a high frequency band without reducing the capacitance of a low frequency band. Ž<P>SOLUTION: Dielectric plates 111, 112 having different compositions are formed on a electrode plate 101 while another electrode plate 102 is formed thereon. At least one of the dielectric plates 111, 112 has a singular point of polarization in an object frequency band. For example, the dielectric plate 111 is made from a silicon carbide SiC while the dielectric plate 112 is made from an aluminum oxide Al<SB>2</SB>O<SB>3</SB>. The dielectric plate 111 has a singular point of polarization at 246 MHz. That is, the dielectric constant greatly changes around at the frequency of 246 MHz. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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