| 摘要 |
PURPOSE:To reduce the loss at a feeding part and to eliminate undesired radiation from the feeding part by feeding power to antenna patterns through a nearly sectorial cavity resonator and feeding power to the antenna patterns in phase. CONSTITUTION:An input radio wave fed from a probe 8b of an input connector 8a is propagated in a broadwise direction only of a cavity resonator 7 because the reflected waves from a guide wall 9a are made in phase in the probe 8b and the distance between the probe 8b and the guide wall 9a is selected as nearly lambdag/4. The input radio wave reaches plural conversion probes 10 along the sectorial cavity resonator 7 and fed to the antenna patterns 5 via a feeding point 6 by a conversion probe 10. Since the cavity resonator 7 is formed sectorial, the distance from the probe 8b of the input connector 8a to the plural conversion probes 10 is all equal. Thus, the power is supplied in phase to the antenna patterns 5 and the polarized faces of all the antenna patterns 5 is arranged. Moreover, since the distance between the conversion probes 10 and the guide wall 9b is selected nearly as lambdag/4, no effect of the reflected wave from the guide wall 9b is given.
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