Helical antenna with adjoining insulator units
AssigneeNEC Corporation
InventorShinichiro Kitano
Life of this patent
Estimating the term…
Abstract
A helical antenna permitting a diminution in dielectric loss includes an antenna section divided into short insulator units with a molded body over which antenna elements are helically would, and the insulator units are connected in tandem. The relationship among the insulator units is so configured that, when they are fitted into one another for connection, the end faces of element units constituting the antenna elements are brought into electric face contact with each other.
Claims11
A helical antenna having a cylindrical insulator body over which elements are laid on external surface, comprising:
- said cylindrical insulator body composed of a plurality of insulator units which present a cylindrical shape when connected together, and
- said element composed of a plurality of element units formed over said plurality of insulator units, the element units having connecting end parts which, when said plurality of insulator units are combined adjoining by contact, are electrically connected by the connecting end parts.
A helical antenna having a cylindrical insulator body over which elements are laid on internal surface, comprising:
- said cylindrical insulator body composed of a plurality of insulator units which present a cylindrical shape when connected together, and
- said element composed of a plurality of element units formed over said plurality of insulator units , the element unit having contact end parts which, when said plurality of insulator units are contactingly adjoined, are electrically connected via the contact end parts.
A helical antenna, comprising:
- a base element composed of
- a cylindrical base insulator unit with an open upper end, and
- plural antenna elements formed on a surface of the base insulator unit;
- and
- at least one further element composed of
- a cylindrical insulator unit of a first outside diameter,
- the further element cylindrical insulator unit having a connecting section at a lower end of a second outside diameter less than the first outside diameter, and
- plural antenna elements formed on a surface of the further element cylindrical insulator unit, wherein
- in an assembled condition, the at least one further element is joined to the base element by the connecting section of the at least one further element being inserted into the open upper end of the base insulator unit and the plural antenna elements of the base element are adjoined by contact with the plural antenna elements of the at least one further element.
Dependencies are inferred from the claim text.