| 摘要 |
PROBLEM TO BE SOLVED: To attain a miniaturization in a plane-shaped antenna device with a plurality of stages of ring filters with stubs. SOLUTION: The UWB plane antenna device 50 has a four-layer structure laminating first to fourth sheets 60, 70, 80 and 90. The ring filter 55 with the stubs at three stages has a positional relationship superposing the first, second and third stages of ring-filter elements 65, 75 and 85 with the stubs from the Y2 side. The ring filter 55 with the stubs at three stages has the positional relationship superposed from the ground patterns 68, 78, 88 and 98 and the Y2 side. COPYRIGHT: (C)2008,JPO&INPIT
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