| 摘要 |
PURPOSE:To obtain an antenna having a large antenna gain and a wide receiving frequency band width by providing a shape to an antenna element forming closed loops passing through each reactance circuit at plural end faces orthogonal to each other of the said element. CONSTITUTION:The antenna includes the antenna element 20 having the element for the 1st loop comprising A-B-C-D and the element for the 2nd loop comprising A-E-F-D connected in parallel with the element for the 1st loop, a variable capacitor 21 functioning as the reactance circuit for the tuning and for setting an output impedance connected in parallel with both the said elements, and a capacitor 22 connected to a connecting point A between both the said elements and the capacitor 21. The antenna element 20 has a shape where closed loops different from each other in side through each variable capacitor 21 is formed at the plural end faces orthogonal to each other. Thus, the antenna having a large antenna gain and a wide receiving frequency band width is obtained. |
