US5083133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Window glass antenna for vehicle
Assignee: Pioneer Corp
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Filing: 1991-03-26
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Granted: 1992-01-21
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Expires: 2011-03-26
Abstract
Abstract A windshield antenna for a vehicle is mounted on a central portion of a window glass of the vehicle. The heating wires serve both as a window defogger element and as an antenna for receiving amplitude-modulated (AM) waves. A pair of first and second antenna elements are disposed on right and left sides of the heating wire, each of the first and second antenna elements serving as an antenna for receiving frequency-modulated (FM) waves. These antenna elements can be the same size, yielding improved diversity reception characteristics.
Inventors
- 👤 Masami Takayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:25
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/1271
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
173 words
A windshield antenna for a vehicle having a window with first and second sides having equal lengths and third and fourth sides having unequal lengths, said antenna comprising: (a) a first antenna element adapted to receive amplitude-modulated (AM) waves, said first antenna element comprising a plurality of AM wave-receiving antenna elements mounted on a central portion of the window in a multi-line fashion, parallel to said first and second sides of said window, each of said plurality of AM wave-receiving antenna elements having an equal length; (b) a pair of spaced-apart second and third antenna elements each adapted to receive frequency-modulated (FM) waves, said second and third antenna elements being disposed on first and second sides of said first antenna element, wherein said second and third antenna elements have equal length and width dimensions, and are disposed symmetrically with respect to said first antenna element so that said second and third antenna elements have the same gain; and wherein said first antenna element is superposed on heating wires mounted on the window glass.
Claim 2
Dependent Claim
173 words
A windshield antenna for a vehicle having a window with first and second sides having equal lengths and third and fourth sides having unequal lengths, said antenna comprising: (a) a first antenna element adapted to receive amplitude-modulated (AM) waves, said first antenna element comprising a plurality of AM wave-receiving antenna elements mounted on a central portion of the window in a multi-line fashion, parallel to said first and second sides of said window, each of said plurality of AM wave-receiving antenna elements having an equal length; (b) a pair of spaced-apart second and third antenna elements each adapted to receive frequency-modulated (FM) waves, said second and third antenna elements being disposed on first and second sides of said first antenna element, wherein said second and third antenna elements have equal length and width dimensions, and are disposed symmetrically with respect to said first antenna element so that said second and third antenna elements have the same gain; and wherein said first antenna element is superposed on heating wires mounted on the window glass.
Claim 3
Dependent Claim
15 words
A windshield antenna according to claim 1, wherein said first antenna element comprises heating wires.
Claim 4
Dependent Claim
25 words
A windshield antenna according to claim 2, wherein said heating wires are mounted on the window glass in parallel, closely spaced relation to one another.
Claim 5
Dependent Claim
20 words
A windshield antenna according to claim 3, wherein said heating wires extend upwardly and downwardly with respect to the window.
Claim 6
Dependent Claim
50 words
A windshield antenna according to claim 1, wherein said window comprises a laminated glass which includes first and second glass panes, and wherein said first antenna is mounted on a surface of said first glass pane, and said heating wires are mounted on a surface of said second glass pane.
Claim 7
Dependent Claim
23 words
A windshield antenna according to claim 1, wherein said second and third antenna elements extend upwardly and downwardly with respect to the window.
Claim 8
Dependent Claim
17 words
A windshield antenna according to claim 6, wherein said second and third antenna elements are linear elements.
Claim 9
Dependent Claim
40 words
A windshield antenna according to claim 6, further comprising first and second amplifiers connected respectively to said second and third antenna elements for amplifying received FM signals, said first and second amplifiers being disposed beneath said window in said vehicle.
Claim 10
Dependent Claim
23 words
A windshield antenna according to claim 8, further comprising a third amplifier, connected to said AM antenna element, for amplifying received AM signals.
Claim 11
Dependent Claim
159 words
A windshield antenna for a vehicle having a window with first and second sides having equal lengths and third and fourth sides having unequal lengths, said antenna comprising: a first antenna element adapted to receive amplitude-modulated (AM) waves, said first antenna element comprising a plurality of AM wave-receiving antenna elements mounted on a central portion of the window in a multi-line fashion, parallel to said first and second sides of said window, each of said plurality of AM wave-receiving antenna elements having an equal length; a pair of spaced-apart second and third antenna elements each adapted to receive frequency-modulated (FM) waves, said second and third antenna elements being disposed on first and second sides of said first antenna element, wherein said second and third antenna elements are arranged symmetrically and have equal length and width dimensions, so as to have the same gain; and wherein said first antenna element is superposed on heating wires mounted on the window glass.
Claim 12
Dependent Claim
159 words
A windshield antenna for a vehicle having a window with first and second sides having equal lengths and third and fourth sides having unequal lengths, said antenna comprising: a first antenna element adapted to receive amplitude-modulated (AM) waves, said first antenna element comprising a plurality of AM wave-receiving antenna elements mounted on a central portion of the window in a multi-line fashion, parallel to said first and second sides of said window, each of said plurality of AM wave-receiving antenna elements having an equal length; a pair of spaced-apart second and third antenna elements each adapted to receive frequency-modulated (FM) waves, said second and third antenna elements being disposed on first and second sides of said first antenna element, wherein said second and third antenna elements are arranged symmetrically and have equal length and width dimensions, so as to have the same gain; and wherein said first antenna element is superposed on heating wires mounted on the window glass.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-01-20 | 1995-07-22 | 1996-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-20 | 1999-07-22 | 2000-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-20 | 2003-07-22 | 2004-01-21 | $7700.00 | Window Closed / Lapsed |