US4803492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle window glass antenna
Assignee: Central Glass Co Ltd
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Filing: 1986-11-21
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Granted: 1989-02-07
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Expires: 2006-11-21
Abstract
Abstract The invention provides an antenna disclosed on or in a vehicle window glass, e.g. an automobile rear window glass, for receiving FM broadcast waves. The antenna has a main element, which extends horizontally from a side marginal region of the glass pane to a middle region but does not intersect the longitudinal center axis of the glass pane, and a phase adjusting element which extends parallel to the main element from the same side marginal region and is connected at its end in the side marginal region to the main element by a perpendicular line. The feed point is connected to an arbitrary point on the perpendicular line. The main element may be folded so as to have at least one horizontally extending turn-back part. The phase adjusting element may extend to the opposite side marginal area of the glass pane and may be folded so as to have a turn-back part which extends horizontally without intersecting the center axis of the glass pane. This antenna is almost non- directional and is high in gain over the entire range of the 76-90 MHz band and the 88-108 MHz band.
Inventors
- 👤 Hiroshi Inaba
- 👤 Masao Shinnai
- 👤 Kazuya Nishikawa
- 👤 Tamotsu Saitoh
- 👤 Tokio Tsukada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:07
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/1271; H01Q1/1278
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
209 words
A two-element antenna attached to a vehicle window glass having right and left side marginal regions and a middle region containing a center axis of the window glass between said side marginal regions; said antenna comprising: a main antenna element formed of a conductive strip which extends substantially horizontally from one side marginal region of the window glass to said middle region of the window glass without intersecting said center axis and is folded in said middle region so as to have a turn-back part which extends substantially horizontally toward said one side marginal region; a phase adjusting antenna element formed of a conductive strip which extends substantially parallel to said main element from said one side marginal region of the window glass along a length not shorter than (λ/4)α-(λ/20)α, wherein λ is the wavelength of an FM wave to be received and is the wavelength shortening coefficient of the antenna; and an interconnection line which extends within said side marginal region of the window glass substantially perpendicularly to the main and phase adjusting antenna elements and connects an end of said phase adjusting element to an end of said main element, the antenna being electrically connected at an arbitrary point on said interconnection line to a feed point.
Claim 2
Dependent Claim
209 words
A two-element antenna attached to a vehicle window glass having right and left side marginal regions and a middle region containing a center axis of the window glass between said side marginal regions; said antenna comprising: a main antenna element formed of a conductive strip which extends substantially horizontally from one side marginal region of the window glass to said middle region of the window glass without intersecting said center axis and is folded in said middle region so as to have a turn-back part which extends substantially horizontally toward said one side marginal region; a phase adjusting antenna element formed of a conductive strip which extends substantially parallel to said main element from said one side marginal region of the window glass along a length not shorter than (λ/4)α-(λ/20)α, wherein λ is the wavelength of an FM wave to be received and is the wavelength shortening coefficient of the antenna; and an interconnection line which extends within said side marginal region of the window glass substantially perpendicularly to the main and phase adjusting antenna elements and connects an end of said phase adjusting element to an end of said main element, the antenna being electrically connected at an arbitrary point on said interconnection line to a feed point.
Claim 3
Dependent Claim
24 words
An antenna according to claim 1, wherein the total horizontal length of said main antenna element is in the range from (λ/5)α to (λ/4)α.
Claim 4
Dependent Claim
18 words
An antenna according to claim 1, wherein the total horizontal length of said main antenna element is (λ/3)α±(λ/20)α.
Claim 5
Dependent Claim
38 words
An antenna according to claim 1, wherein said phase adjusting antenna element extends to the opposite side marginal region of the window glass and is folded so as to have at least one turn-back part extending substantially horizontally.
Claim 6
Dependent Claim
21 words
An antenna according to claim 1, formed by applying a conductive paste onto the window glass and baking the applied paste.
Claim 7
Dependent Claim
22 words
An antenna according to claim 1, wherein the window glass is a laminated glass, the antenna being embedded in the laminated glass.
Claim 8
Dependent Claim
31 words
An antenna according to claim 1, wherein said main antenna element has a single turn-back part, and the length of the main element is in the range from (λ/5)α to (λ/4)α.
Claim 9
Dependent Claim
24 words
An antenna according to claim 1, wherein said main antenna element has two turn-back parts, and the length of said main element is (λ/2)α±(λ/20)α.
Claim 10
Dependent Claim
22 words
An antenna according to claim 1, wherein said phase adjusting antenna element consists of a single straight strip having a length (λ/4)α±(λ/20)α.
Claim 11
Dependent Claim
27 words
An antenna according to claim 1, wherein said phase adjusting element has a single turn-back part, and the length of the phase adjusting antenna element is (λ/2)α±(λ/20)α.
Claim 12
Dependent Claim
26 words
An antenna according to claim 1, wherein said phase adjusting antenna element has two turn-back parts, and the length of the phase adjusting element is (3λ/4)α±(λ/20)α.
Claim 13
Dependent Claim
25 words
An antenna according to claim 1, wherein said phase adjusting, antenna has three turn-back parts, and the length of the phase adjusting element is λα±(λ/20)α.
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) | 1992-02-07 | 1992-08-08 | 1993-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-07 | 1996-08-08 | 1997-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-07 | 2000-08-08 | 2001-02-07 | $7700.00 | Window Closed / Lapsed |