| 摘要 |
<p>The invention provides a surface mount type antenna (10), comprising a dielectric/magnetic base (11) having first and second main surfaces opposite from each other and side surfaces substantially perpendicular to said main surfaces, a feed electrode (2a,2b) disposed on said base (11), a ground electrode (3a,3b) disposed on said base (11), and a radiation electrode (1a,1b,1c,1d) disposed on said base (11) and having an open-circuited end capacitively coupled to said feed electrode (2a,2b) and a short-circuited end connected to said ground electrode (3a,3b), which is characterized in that said open-circuited end of said radiation electrode (1a,1b,1c,1d) is capacitively coupled to said feed electrode (2a,2b) by extending said radiation electrode (1c,1d) to both of said first and second main surfaces. By this structure it is possible to reduce the manufacturing cost by reducing the number of surfaces of a dielectric base on which various patterns are formed, and to improve the facility of the above-mentioned impedance matching while avoiding an increase in size. <IMAGE></p> |
