PURPOSE: To increase the directional control range of the antenna for the mobile antenna device which is used for the satellite communication, by selecting the bend angle to those values other than 90° for the beam which forms the beam wave guide.
CONSTITUTION: Ducts 42 and 43 combined together with bearing 44 are attached to car body 21 or the like via bearing 45. These bearings 45 and 44 are located so that angle α may be formed between their center axes 13' and 14', and at the same time angle β is formed between axis 14' and mirror axis 54 of the main reflector each. Then the beam wave guide is formed with a primary radiator 27, curved reflector 48 and plane reflector 49 each; and the beam is radiated along axis 54 and with formation of angles α and β. Here if angle α is set smaller than 90° with angle β set larger than 90° respectively, reflector 26 is turned upward to increase the angle at which reflector 26 hits duct 42 or driving part 53 and others. Thus the mobile range can be increased. Furthermore, the undesired control region lower than the horizontal direction can be eliminated, thus increasing the wave angle.
KOSUKEGAWA KAZUO
TAKANO TADASHI
NARA TAKEJI
NIPPON TELEGRAPH & TELEPHONE
| JPS5175313A | 1976-06-29 |