Multi-band antenna with dielectric body improving higher frequency performance

An antenna having a reflector, the reflector defining a plane, the antenna comprising:

• a protective shroud comprising nonconductive material,
• plural radiating elements disposed between the protective shroud and the reflector, said plural radiating elements comprising at least a lower frequency band radiating element and at least an upper frequency band radiating element,
• the radiating elements for the lower frequency band being disposed at a first distance range from the reflector,
• the radiating elements for the higher frequency band being disposed a second distance range from the reflector, said second distance range being closer to said reflector than said first distance range, a distance area being defined parallel to the reflector between the upper frequency radiating elements and the lower frequency radiating elements,
• at least one dielectric body which does not form the protective shroud
• at least part of the dielectric body being disposed in the distance area which extends parallel to the reflector and is defined by the radiating elements for the lower frequency band and by the radiating elements for the upper frequency band,
• the dielectric body comprising an extent component which runs toward the plane of the reflector and is longer than its extent direction which runs at right angles to the plane of the reflector, and/or than its distance from the plane of the reflector.

An antenna of the type including a reflector, the antenna comprising:

• a protective shroud composed of nonconductive material,
• radiating elements arranged between the protective shroud and the reflector, said radiating elements including lower frequency band radiating elements and upper frequency band radiating elements,
• the radiating elements for the lower frequency band being arranged at a first distance, or in a first distance range, in front of the reflector,
• the radiating elements for the higher frequency band being arranged at a second distance, or in a second distance range, in front of the reflector, said second distance or second distance range being closer to said reflector than said first distance or first distance range, at least one of said higher frequency band radiating elements and said lower frequency band radiating elements being arranged in a dipole square,
• at least one dielectric body which does not form the protective shroud,
• said dielectric body being arranged in a vertical plan view of the reflector such,
• that the dielectric body is located at the same level as and within the dipole square,
• the dielectric body having a surface area defined by a right-angle projection onto the plane of the reflector, the size of said surface area being larger than the square of the linear distance which is obtained from the distance between the plane of the reflector and at least one of:
• (1) the dielectric body,
• (2) the distance between the plane of the reflector and a center plane which runs through the dielectric body, and
• (3) the distance between the plane of the reflector and the outer boundary surface of the dielectric body, facing away from the reflector plane.

An antenna comprising:

• a protective shroud composed of nonconductive material,
• plural radiating elements arranged underneath the protective shroud and in front of the reflector, said plural radiating elements including lower frequency band radiating elements and upper frequency band radiating elements,
• the radiating elements for the lower frequency band being disposed at a first distance, or in a first distance range, in front of the reflector,
• the radiating elements for the higher frequency band being arranged at a second distance, or in a second distance range, in front of the reflector, the higher frequency band radiating elements being closer to the reflector than the lower frequency band radiating elements, and
• at least one dielectric body which does not form the protective shroud
• at least part of the dielectric body extending above parts of the radiating elements at a distance in front of the reflector,
• the dielectric body extending parallel to the reflector, and
• when viewed in a vertical plan view of the reflector, having a flat extent which is greater than the flat extent,
• attachment elements being coupled to the dielectric body, said attachment elements running toward the reflector.

A plural-band antenna comprising:

• a reflector;
• at least one lower frequency band radiating element disposed a first distance from the reflector,
• at least one upper frequency band radiating element disposed a second distance from the reflector, wherein said first distance is greater than said second distance;
• and
• a dielectric body at least partially disposed between said at least one upper frequency band radiating element and said at least one lower frequency band radiating element, said dielectric body improving upper frequency band antenna performance characteristics substantially without degrading lower frequency band antenna performance.