| 摘要 |
There will be provided a plane patch antenna through which a desired resonance frequency can be obtained with stability without requiring any troublesome frequency adjusting operation. On one surface of a dielectric substrate to be obtained by calcining ceramic powder press-molded in a desired shape, a concave groove is continuously formed along the inside of its outer edge, and on an entire surface within a region partitioned by this concave groove, a patch electrode is thick-film printed. In the plane patch antenna structured as described above, the precision of the patch electrode during thick-film printing becomes excellent depending upon the processing precision of the concave groove, and yet, a fluctuation in a resonance frequency associated with variations in a dielectric constant and a fluctuation in the resonance frequency associated with variations in the area of the patch electrode offset each other, and therefore, a desired resonance frequency can be obtained with stability irrespective of the variations in dimension of the dielectric substrate after calcination.
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