| 摘要 |
PROBLEM TO BE SOLVED: To provide a nonreversible circuit element provided with a matching capacitor that eliminates deficiencies such as electrode burns and cracks caused by an Ag thick film electrode and has an excellent characteristics, and to pro vide communication equipment. SOLUTION: In this nonreversible circuit element, the matching capacitor is arranged between an input-output import and a ground. In the capacitor, a first buffer layer 31, a second buffer layer 32 and a main electrode layer 33 are formed on both principal planes of a dielectric board 30 in order from a lower layer by a dry film layer formation method such as sputtering. As materials, for instance, a Ni-Cr alloy is used for the first buffer layer 31, a Ni-Cu alloy is used for the second buffer layer 32, and Ag is used for the main electrode layer.
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