PLANARANTENNE

摘要

A planar antenna (10) includes a grounding conductor plate (11), a power supply plate (12) having a pattern (14) of power supplying conductor strips each including power supply terminals (14a), and a radiation plate (13) having apertures (15) forming radiation elements, the respective plates being arranged sequentially with an insulating layer interposed between adjacent ones of the plates to separate them whilst coupling electromagnetically the respective power supplying terminals of the power supplying conductor pattern on the power supply plate to the radiation elements provided as the apertures in the radiation plate. With this arrangement, the planar antenna makes it possible to receive at a high gain circularly polarized waves over a wide range from a satellite. The apertures (15) have a composite contour formed from a square (15a) and a superimposed rectangle (15b) inclined at 45 DEG to one another. <IMAGE>