| 摘要 |
A circularly polarized wave microstrip antenna (1) comprises a dielectric substrate (4) provided with a ground conductor (3) on one surface thereof and a radiation conductor (2) on the other surface thereof, said radiation conductor (2) being a plane and being shaped such that a center point (O) of said radiation conductor (2) can be defined, wherein electrical power is fed to a first feeding point (P1) and to a second feeding point (P2) each being provided eccentrically on the radiation conductor (2) such that a first reference line defined by the center point (O) and the first feeding point (P1) and a second reference line defined by the center point (O) and the second feeding point (P2) form a right angle at the center point (O) on the radiation conductor (2). The radiation conductor is further provided with one frequency adjusting projection (22a,22b,22c,22d) arranged in the plane of said radiation conductor (2) at each of positions of angles of 0 DEG and 180 DEG with respect to the first reference line and at each of positions of angles of 0 DEG and 180 DEG with respect to the second reference line; wherein each of said frequency adjusting projections (22a,22b,22c,22d) are abraded for adjustment of the frequency. <IMAGE>
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