| 摘要 |
PURPOSE:To improve the standing wave ratio of a primary radiator with no deterioration of radiation characteristics of an antenna device by providing plural conductors at the front of the primary radiator and concentrating the radio wave reflected from each conductor to the radiator. CONSTITUTION:A reflector 2 is provided to reflect the radio wave delivered from a primary radiator 1, and plural conductors 7 are set between the radiator 1 and the reflector 2. The distance between the reflector 2 and the conductors 7 is decided so that an opposite phase is obtained between the radio wave which is reflected by the reflector 2 and sent back to the radiator 1 and the radio wave reflected by each conductor 7 and sent back to the radiator 1. Thus the standing wave ratio is improved for the radiator 1, and furthermore the radio waves reflected by these conductors 7 are converged at the position of the radiator 1. However, the field intesity is reduced since the radio waves reflected by the conductors 7 have different phase from each other at other places than the radiator 1. Therefore the effect can be reduced to the radiation characteristics of an antenna device. |
