| 摘要 |
PROBLEM TO BE SOLVED: To obtain a desired directivity.SOLUTION: An array antenna includes a plurality of antennas having a radiation element radiating radio waves, a main feedline for feeding power to the radiation element, and a feedline for setting a desired percentage of the impedance of the radiation element in resonant condition and the impedance of the main feedline, by connecting the radiation element and main feedline, and feeding the power, fed from the main feedline, to the radiation element. The plurality of antennas are arranged on the main feedline, at an interval of the guide wavelength in the main feedline, and the length of the main feedline is lengthened in the feeding order from the main feedline.SELECTED DRAWING: Figure 1A |
