Abstract: An antenna device includes a concave-shaped reflecting mirror that reflects radio waves, a primary radiator disposed in the concave mirror and transmitting/receiving radio waves, and an antenna cover attached to an opening face of the reflecting mirror. The antenna cover is secured to the reflecting mirror with a flange part formed on the rim of the antenna cover and fitted to the inner side of a flange part formed on the rim of the reflecting mirror.

Abstract: Provided is a parabolic antenna that suppresses leakage of radio waves with a simpler configuration. The parabolic antenna includes a horn that transmits and receives signals; a feed that supports the horn and relays the signals the horn transmits and receives; a reflector that reflects the received signals to focus the received signals on the horn and reflects the signals from the horn to transmit the signals; a reflecting mirror supporting member that supports the reflector; and a feed fitting adapter that enables the feed to be fitted into the reflecting mirror supporting member. A choke groove is formed in at least one of a joint area between the reflecting mirror supporting member and the reflector and a joint area between the reflecting mirror supporting member and the feed fitting adapter, which suppresses propagation of radio waves traveling through the gap of the joint area.

Abstract: A reflector antenna includes a reflector, a primary radiator, an arm, and a feed unit (a coaxial cable and a coaxial connector). The reflector has a reflecting surface for reflecting a radio wave, and the reflecting surface is shaped as a paraboloid of revolution. The primary radiator is arranged on a focus side of the reflector, and radiates a radio wave from the focus side toward the reflecting surface. The arm is arranged to extend from the reflecting surface side to the focus side of the reflector, and supports the primary radiator so as to be rotatable with respect to the reflector. The feed unit feeds the primary radiator via the arm so that the direction of the arm and the direction of polarization of the radio wave radiated from the primary radiator are perpendicular to each other.

Abstract: An antenna device includes a concave-shaped reflecting mirror that reflects radio waves, a primary radiator disposed in the concave mirror and transmitting/receiving radio waves, and an antenna cover attached to an opening face of the reflecting mirror. The antenna cover is secured to the reflecting mirror with a flange part formed on the rim of the antenna cover and fitted to the inner side of a flange part formed on the rim of the reflecting mirror.

Abstract: Provided is a parabolic antenna that suppresses leakage of radio waves with a simpler configuration. The parabolic antenna includes a horn that transmits and receives signals; a feed that supports the horn and relays the signals the horn transmits and receives; a reflector that reflects the received signals to focus the received signals on the horn and reflects the signals from the horn to transmit the signals; a reflecting mirror supporting member that supports the reflector; and a feed fitting adapter that enables the feed to be fitted into the reflecting mirror supporting member. A choke groove is formed in at least one of a joint area between the reflecting mirror supporting member and the reflector and a joint area between the reflecting mirror supporting member and the feed fitting adapter, which suppresses propagation of radio waves traveling through the gap of the joint area.

Abstract: A reflector antenna includes a reflector, a primary radiator, an arm, and a feed unit (a coaxial cable and a coaxial connector). The reflector has a reflecting surface for reflecting a radio wave, and the reflecting surface is shaped as a paraboloid of revolution. The primary radiator is arranged on a focus side of the reflector, and radiates a radio wave from the focus side toward the reflecting surface. The arm is arranged to extend from the reflecting surface side to the focus side of the reflector, and supports the primary radiator so as to be rotatable with respect to the reflector. The feed unit feeds the primary radiator via the arm so that the direction of the arm and the direction of polarization of the radio wave radiated from the primary radiator are perpendicular to each other.

Abstract: A sector beam antenna with a scattering component, in which a desired radiation pattern can be obtained, is provided. The sector beam antenna with the scattering component provides parallel plates composed of two conductive plates disposed in parallel in which the distance between the parallel plates is longer than a half wavelength and shorter than one wavelength of a using wavelength, a primary radiator block having an H bend function disposed between the parallel plates, an input port opened at one of the parallel plates in order to supply power to the primary radiator block, and a scattering component made of a conductive material and disposed in parallel to an aperture being an opening end of the parallel plates in a state that a designated distance exists between the scattering component and the aperture. With this structure, the radiation pattern radiating from the aperture can be formed freely.