Antenna for mobile telephone on a glass panel of an automobile

Patent 4914447 Issued on April 3, 1990. Estimated Expiration Date:

February 16, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Antenna system for window glass of automobile
Patent #: 4260989
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AM-FM Broadband vehicle windshield mounted radio antenna
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Issued on: 04/05/1988
Inventor: Sakurai , et al.

Shielded dipole glass antenna with coaxial feed
Patent #: 4746925
Issued on: 05/24/1988
Inventor: Toriyama

Vehicle window glass antenna using transparent conductive film
Patent #: 4768037
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Window antenna for a vehicle Patent #: 4791425
Issued on: 12/13/1988
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Inventors

Assignee

Asahi Glass Company Ltd.

Application

No. 311390 filed on 02/16/1989

US Classes:

343/713Supported by vehicle body

Examiners

Primary: Hille, Rolf
Assistant: Johnson, Doris J.

Attorney, Agent or Firm

Oblon, Spivak, McClelland, Maier & Neustadt

Foreign Patent References

0124055 EP 11/23/1984
0100004 JP. 05/23/1986
0222302 JP. 10/23/1986
0280107 JP. 12/23/1986

International Class

H01Q 001/32

Foreign Application Priority Data

1986-11-21 JP

Abstract

An antenna system for mobile telephone is arranged on a glass panel, i.e. the rear window glass panel of an automobile. The antenna system comprises a main antenna part comprising a horizontal antenna element, a pair of vertical antenna elements extending vertically from the both ends of the horizontal antenna element, and a first feeding point connected to the free end of one of the vertical antenna elements, an earth line part, provided apart from the main antenna part, which extends in parallel to the horizontal antenna element and which has a second feeding point at an intermediate portion of the earth line part and below the first feeding point, and an auxiliary antenna part which has an extension element extending in parallel to the earth line part and which is connected to either or both of the horizontal antenna element of the main antenna part and the free end of the vertical antenna element connected to the first feeding point.