Antenna for mounting on vehicle, antenna element and manufacturing method thereof

A method of manufacturing an antenna element comprising:

• orienting a coiled conductor within a mold;
• introducing a liquid mold material into the mold;
• allowing the liquid mold material to solidify, the coiled conductor being at least partially embedded within the solidified mold material and forming an integral element with the mold material;
• removing the coiled conductor and the mold material from the mold;
• providing a mounting fitting member, the mounting fitting member having a substantially cylindrical portion;
• and
• engaging an end part of the coiled conductor with the substantially cylindrical portion, wherein said end part of the coiled conductor has a number of turns per unit length greater than a remainder of the coiled conductor.

A method of manufacturing an antenna element comprising:

• orienting a coiled conductor within a mold;
• introducing a liquid mold material into the mold;
• allowing the liquid mold material to solidify, the coiled conductor being at least partially embedded within the solidified mold material and forming an integral element with the mold material;
• removing the coiled conductor and the mold material from the mold;
• inserting a flexible center rod into an axially extending interior of the integral mold material and coiled conductor;
• and
• covering the mold material and the coiled conductor with an insulating cover.

A method of manufacturing an antenna element comprising:

• orienting a coiled conductor within a mold;
• introducing a liquid mold material into the mold;
• allowing the liquid mold material to solidify, the coiled conductor being at least partially embedded within the solidified mold material and forming an integral element with the mold material;
• removing the coiled conductor and the mold material from the mold;
• and
• inserting a center pipe into an interior of the coiled conductor prior to introducing the liquid mold material into the mold, the center pipe becoming integral with the mold material when the mold material is allowed to solidify.

A method of manufacturing an antenna element comprising:

• orienting a coiled conductor within a mold;
• introducing a liquid mold material into the mold;
• allowing the liquid mold material to solidify, the coiled conductor being at least partially embedded within the solidified mold material and forming an integral element with the mold material;
• removing the coiled conductor and the mold material from the mold;
• and
• wherein the integral mold material and coiled conductor are in the shape of a hollow cylinder.

An antenna element comprising:

• a conductive mounting member having a substantially cylindrical portion;
• a coiled conductor engaged at an end part with the substantially cylindrical portion of the mounting member;
• a substantially cylindrical insulating structure, the coiled conductor being embedded within the insulating structure, wherein
• the insulating structure surrounds at least a portion of an outer peripheral surface of the substantially cylindrical portion of the mounting member;
• and
• wherein an inner surface of the coiled conductor is disposed around said outer peripheral surface of the substantially cylindrical portion.

An antenna element comprising:

• a conductive mounting member;
• a coiled conductor engaged at an end part with the mounting member;
• a substantially cylindrical insulating structure, the coiled conductor being embedded within the insulating structure, wherein
• the insulating structure is a unitary molded structure, the coiled conductor being integrally formed with the insulating structure,
• wherein the conductive mounting member includes a substantially cylindrical portion, the insulating structure being integrally molded about a portion of the substantially cylindrical portion;
• and
• wherein an outer diameter of the coiled conductor is approximately equal to an outer diameter of the insulating structure.

An antenna element comprising:

• a conductive mounting member;
• a coiled conductor engaged at an end part with the mounting member;
• a substantially cylindrical insulating structure, the coiled conductor being embedded within the insulating structure, wherein
• the insulating structure is a unitary molded structure, the coiled conductor being integrally formed with the insulating structure,
• wherein the conductive mounting member includes a substantially cylindrical portion, the insulating structure being integrally molded about a portion of the substantially cylindrical portion;
• and
• wherein an inner diameter of the coiled conductor is approximately equal to an inner diameter of the insulating structure.