| 摘要 |
PROBLEM TO BE SOLVED: To secure antenna directivity at a low elevation angle even when a ground plate (earth plate) with all area is used. SOLUTION: The antenna system (10) with a patch antenna (12) is provided with a parasitic conductor wall (18) surrounding the patch antenna. The conductor wall (18) is made of, for example, metal. The conductor wall (18) is composed of a square main conductor plate (182) provided a distance away from a bottom surface (122d) of the patch antenna (12), four side plates (184) which extend upward from the four sides of the main conductor plate, and four trapezoidal tongue pieces (186) which extend inward from upper ends of the four side walls and in parallel to the main conductor plate. COPYRIGHT: (C)2005,JPO&NCIPI
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