| 摘要 |
PURPOSE:To miniaturize a termination resistor, by providing a feeding means where feeding power is concentrated from the circumferential wall of a waveguide space on its center, so as to uniform irradiated power and to increase the gain of an antenna. CONSTITUTION:A pair of metallic discs 1, 2 are arranged so as to be opposed to each other with an interval, and plural slots 1a as power irradiating opening are formed to the metallic disc 1. Further, an opening 2a as a feeding section is formed to the other metallic disc 2. A waveguide space S is formed at the inside with a metallic circumferential wall 4 linking the circumference of the discs 1, 2 and both metallic discs. Then, a coupling means concentrating the supplied power from the opening 2a to the waveguide space S from the circumferential wall 4 on the center is provided to the waveguide space S. Thus, the irradiated power is uniformed and the gain of the antenna is increased. Since the terminating resistor 7 is provided at the center of the waveguide space S, it is miniaturized. |
