High frequency wave glass antenna for an automobile
AssigneeAsahi Glass Company, Limited
InventorsFumitaka Terashima, Toshihiko Saitou, Kiyoshi Shibata
Life of this patent
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Abstract
A high frequency wave glass antenna for automobile in which a line shape or a strip shape antenna conductor is provided on a glass plate of a window of an automobile in an approximately circular, an approximately elliptic or an approximately polygonal form having an opening portion, a first end of two ends on both sides in the vicinity of the opening portion of the antenna conductor is connected to an electricity feeding portion and a second end thereof is connected to a grounding conductor, and which provides the electricity feeding portion and the grounding conductor that are proximate to each other, or the grounding conductor having a predetermined area.
Claims31
A high frequency wave glass antenna for an automobile comprising:
- an active line shaped antenna provided on a glass plate of a window of an automobile, said line shape antenna having a shape selected from the group consisting of a circular, elliptic and a polygonal shape, said line shape antenna having an opening portion enclosed by said line shape antenna and having two ends forming a mouth of said opening, the length of said line shape antenna being in a range of from 45 to 150% of one wavelength of a received radio wave, a first end of said two ends of the line shape antenna is connected to an electricity feeding portion and a second end of said two ends is connected to a grounding conductor;
- and
- wherein an area of the grounding conductor is not smaller than 2.5 cm.sup.2.
A high frequency wave glass antenna for an automobile comprising:
- an active line shape antenna provided on a glass plate of a window of an automobile, said line shape antenna having a shape selected from the group consisting of a circular, elliptic and a polygonal shape, said line shape antenna having an opening portion enclosed by said line shape antenna and having two ends forming a mouth of said opening, the length of said line shape antenna being in a range of 45 through 150% of one wavelength of a received radio wave, a first end of said two ends of the line shape antenna is connected to an electricity feeding portion and a second end of said two ends is connected to a grounding conductor;
- and
- wherein the electricity feeding portion and the line shape antenna in the vicinity of the electricity feeding portion are capacitively coupled to the grounding conductor.
A high frequency wave glass antenna for an automobile comprising:
- a line shape antenna provided on a glass plate of a window of an automobile, said line shape antenna having a shape selected from the group consisting of a circular, elliptic and a polygonal shape, said line shape antenna having an opening portion enclosed by said line shape antenna and having two ends forming a mouth of said opening, the length of said line shape antenna being in a range of 45 through 150% of one wavelength of a received radio wave, a first end of said two ends of the line shape antenna is connected to an electricity feeding portion and a second end of said two ends is connected to a grounding conductor;
- and
- wherein a transverse distance between a point where the grounding conductor contacts the second end of the line shape antenna to a side of the grounding conductor closest to the electricity feeding portion is not smaller than 50% of an inner transverse width of the line shape antenna.
Dependencies are inferred from the claim text.