US5497166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual frequency batwing antenna
Assignee: Individual
•
Filing: 1994-11-10
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Granted: 1996-03-05
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Expires: 2014-11-10
Abstract
Abstract A dual frequency batwing antenna includes a larger batwing with smaller UHF batwings located in substantially the same plane but within a vacant space provided by the larger batwing. The smaller batwings are also co-linear so there is no inductive coupling. Thus a pair of radio frequency signals are radiated from a common aperture.
Inventors
- 👤 Ali R. Mahnad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:15
CPC Classifications
H; H01; H01Q; H01Q21/00; H01Q21/06; H01Q21/20; H01Q5/00; H01Q5/40; H01Q9/00; H01Q9/04; H01Q9/16; H01Q9/28
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
126 words
A radio frequency antenna for radiating a pair of radio frequency signals having first and second frequencies with a ratio of substantially two to one or greater comprising: a first pair of batwing radiating elements for mounting on a vertical support mast and for radiating said first frequency; each said batwing element having an effective conductive sheet partially formed by a top horizontal termination and a bottom horizontal termination which also circumscribe with said support mast a substantially vacant rectangular space; two or more smaller batwing radiating elements for radiating a second higher frequency mounted to said mast substantially within said vacant rectangular space of one of said first pair of batwing elements and being substantially co-linear with said effective conductive sheet of said one element.
Claim 2
Dependent Claim
126 words
A radio frequency antenna for radiating a pair of radio frequency signals having first and second frequencies with a ratio of substantially two to one or greater comprising: a first pair of batwing radiating elements for mounting on a vertical support mast and for radiating said first frequency; each said batwing element having an effective conductive sheet partially formed by a top horizontal termination and a bottom horizontal termination which also circumscribe with said support mast a substantially vacant rectangular space; two or more smaller batwing radiating elements for radiating a second higher frequency mounted to said mast substantially within said vacant rectangular space of one of said first pair of batwing elements and being substantially co-linear with said effective conductive sheet of said one element.
Claim 3
Dependent Claim
18 words
An antenna as in claim 1 where said second frequency is an integral multiple of said first frequency.
Claim 4
Dependent Claim
13 words
An antenna as in claim 1 where said conductive sheet is a grid.
Claim 5
Dependent Claim
40 words
An antenna as in claim 1 including a second pair of radiating elements resonant at said first frequency and mounted on said mast in quadrature with said first pair resonant at said first frequency to provide a circular radiation pattern.
References Cited (Backward Citations)
US3747111A
Cited
US4180420A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-03-05 | 1999-09-04 | 2000-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-03-05 | 2003-09-04 | 2004-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-03-05 | 2007-09-04 | 2008-03-05 | $7700.00 | Window Closed / Lapsed |