US4727377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Window antenna for a vehicle with dual feed points
Assignee: Nippon Sheet Glass Co Ltd
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Filing: 1986-05-15
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Granted: 1988-02-23
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Expires: 2006-05-15
Abstract
Abstract A pair of antenna elements are mounted on a glass of a rear quarter window of a vehicle. Feed points of these elements are provided at a corner portion of the window. One antenna element extends clockwise about the center of the window glass and the other antenna element extends counterclockwise thereabout from their corresponding feed points. The characteristics of both antenna elements significantly differ and complement each other. It is convenient for a diversity reception system. An auxiliary element branches from one antenna element to extend along the other antenna element. The auxiliary element compensates for impedance characteristics of the antenna elements to tune up reception characteristics thereof.
Inventors
- 👤 Hiroshi Yotsuya
- 👤 Yoshiro Okamoto
- 👤 Hiroshi Kondo
- 👤 Kaoru Sakurai
- 👤 Harunori Murakami
- 👤 Hajime Murakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:17
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/1271
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
78 words
A window antenna mounted on a glass of a rear quarter window of a vehicle, comprising a pair of antenna elements and feed points of said antenna elements, these feed points being arranged at one corner portion of the window, and one antenna element extending clockwise about the center of the window glass and the other antenna extending counterclockwise thereabout, from their corresponding feed points wherein said pair of antenna elements are incorporated in a diversity reception system.
Claim 2
Dependent Claim
78 words
A window antenna mounted on a glass of a rear quarter window of a vehicle, comprising a pair of antenna elements and feed points of said antenna elements, these feed points being arranged at one corner portion of the window, and one antenna element extending clockwise about the center of the window glass and the other antenna extending counterclockwise thereabout, from their corresponding feed points wherein said pair of antenna elements are incorporated in a diversity reception system.
Claim 3
Dependent Claim
21 words
A window antenna according to claim 1, wherein said antenna elements are arranged on both rear quarter windows of the vehicle.
Claim 4
Dependent Claim
45 words
A window antenna according to claim 1, wherein at least one of said antenna elements have a main element comprising a pair of horizontally extending parallel wires both ends of which are short-circuited and a feeder element connecting said main element to said feed point.
Claim 5
Dependent Claim
35 words
A window antenna according to claim 3, wherein said main element extends along one of upper and lower sides of said window and said feeder element extends along one of vertical sides of said window.
Claim 6
Dependent Claim
21 words
A window antenna according to claim 1, wherein one of said antenna elements extends along two adjacent sides of said window.
Claim 7
Dependent Claim
20 words
A window antenna according to claim 1, wherein one of said antenna elements extends along three sides of said window.
Claim 8
Dependent Claim
33 words
A window antenna according to claim 1, wherein one of said antenna elements extends along four sides of said window so as to encircle a rectangular or trapezoidal area corresponding to the window.
Claim 9
Dependent Claim
28 words
A window antenna according to claim 1, wherein distal end portions of said antenna elements extend close to one another so as to cause induction with each other.
Claim 10
Dependent Claim
27 words
A window antenna according to claim 1, wherein one of said antenna elements comprises a horizontally extending element and another antenna element comprises a vertically extending element.
Claim 11
Dependent Claim
94 words
A window antenna mounted on a glass of a rear quarter window of a vehicle, comprising a pair of antenna elements, feed points of said antenna elements arranged at one corner portion of the window, one antenna element extending clockwise about the center of the window glass and the other antenna element extending counterclockwise thereabout, from their corresponding feed points, and an auxiliary element branched from one antenna element to extend along the other antenna element, for correcting the impedance thereof, wherein said pair of antenna elements are incorporated in a diversity reception system.
Claim 12
Dependent Claim
94 words
A window antenna mounted on a glass of a rear quarter window of a vehicle, comprising a pair of antenna elements, feed points of said antenna elements arranged at one corner portion of the window, one antenna element extending clockwise about the center of the window glass and the other antenna element extending counterclockwise thereabout, from their corresponding feed points, and an auxiliary element branched from one antenna element to extend along the other antenna element, for correcting the impedance thereof, wherein said pair of antenna elements are incorporated in a diversity reception system.
Claim 13
Dependent Claim
23 words
A window antenna according to claim 10, wherein said pair of antenna elements are arranged on both rear quarter windows of the vehicle.
Claim 14
Dependent Claim
17 words
A window antenna according to claim 10, wherein said auxiliary element is branched from said feed point.
Claim 15
Dependent Claim
80 words
A window antenna according to claim 10, wherein at least one of said antenna elements have a main element comprising a pair of horizontally extending parallel wires both ends of which are short-circuited and a feeder element connecting said main element to said feed point, said main element extending along one of upper and lower sides of said window, said feeder element extending along one of vertical sides of said window, and said auxiliary element extending along said feeder element.
Claim 16
Dependent Claim
13 words
A window antenna according to claim 10, wherein said auxiliary element extends horizontally.
Claim 17
Dependent Claim
13 words
A window antenna according to claim 10, wherein said auxiliary element extends vertically.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-22 | 1991-08-24 | 1992-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-22 | 1995-08-24 | 1996-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-22 | 1999-08-24 | 2000-02-23 | $7700.00 | Window Closed / Lapsed |