| 摘要 |
PURPOSE: A planar antenna is provided to improve antenna sensitivity, prevent the image effect and make the antenna small and light by preparing an RF(radio frequency) circuit and an antenna in a same plane and cutting off unwanted electric waves from an external RF circuit. CONSTITUTION: A pair of electrically connected grounding plates(13,14) are installed outside a pair of dielectric plates(11,12). A pair of radiators(13a,14a) protruding from the grounding plates(13,14) generate electrical waves. One end of a feeding line(15) is placed between the dielectric plates(11,12) to form an electrical connection. An RF circuit pattern-formed between the dielectric plates(11,12), connected to the other end of the feeding line(15), feeds electric current to the feeding line(15). The electric current is converted to an electrical wave and radiated outwardly by the radiators(13a,14a).
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