US5041842A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helical base station antenna with support
Assignee: Individual
•
Filing: 1990-04-18
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Granted: 1991-08-20
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Expires: 2010-04-18
Abstract
Abstract A base station antenna is disclosed having a ground plane in the form of a coarse screen. The coarse screen is connected to a support member. A pair of helical radiators is coupled, through the support member, to the coarse screen with one of the helical radiators being pivotable about its axis to vary the polarization.
Inventors
- 👤 Herbert R. Blaese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:36
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/36; H01Q1/362; H01Q11/00; H01Q11/02; H01Q11/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
An antenna which comprises: a horizontally disposed support member comprising a metal channel having a generally U-shaped cross-sectional configuration; a screen formed of electrically conductive material for operation as a ground plane; means for coupling said screen to said support member; a helical radiator disposed along an axis and having a proximal end and a distal end; means for pivotally mounting said helical radiator adjacent said screen, whereby said helical radiator can be pivoted about said axis to vary the polarization; a vertical mast for supporting said antenna; a U-shaped bolt for connecting said mast to said support member; said support member defining a groove which cooperates with said U-shaped bolt to aid in clamping said mast to said support member.
Claim 2
Dependent Claim
121 words
An antenna which comprises: a horizontally disposed support member comprising a metal channel having a generally U-shaped cross-sectional configuration; a screen formed of electrically conductive material for operation as a ground plane; means for coupling said screen to said support member; a helical radiator disposed along an axis and having a proximal end and a distal end; means for pivotally mounting said helical radiator adjacent said screen, whereby said helical radiator can be pivoted about said axis to vary the polarization; a vertical mast for supporting said antenna; a U-shaped bolt for connecting said mast to said support member; said support member defining a groove which cooperates with said U-shaped bolt to aid in clamping said mast to said support member.
References Cited (Backward Citations)
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US3419875A
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US3509578A
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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) | 1994-08-19 | 1995-02-18 | 1995-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-19 | 1999-02-18 | 1999-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-19 | 2003-02-18 | 2003-08-20 | $7700.00 | Window Closed / Lapsed |