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US3896444A
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Blending function and blending function generator
Assignee: Amalgamated Wireless Australasia Ltd
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Filing: 1974-01-09
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Granted: 1975-07-22
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Expires: 1994-01-09
Abstract
Abstract A blending function generator for use in the electronic commutation of a ring of antenna elements in doppler omni-range (DVOR) systems. The blending function comprises a first lobe flanked by second and third lobes, the first lobe consisting of a cosine lobe having a period of 2T seconds where T Ymn where m is a number and n is a whole number, the second and third lobes each consisting of a cosine lobe having a period of T seconds, the second and third lobes being of the same phase and of opposite phase to the first lobe.
Inventors
- 👤 Paul Lin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:55
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02; G01S1/08; G01S1/38; G01S1/40
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
154 words
A blending function generator as defined herein comprising first means for delivering a cosine-modulated train of radio frequency energy wherein each cosine-modulated lobe has a period 2T seconds where T 1/mn where m is a number and n is a whole number, second means for delivering a cosine-modulated train of radio frequency energy wherein each cosine-modulated lobe has a period T seconds, wherein the radio frequency energy of the second means has the same frequency as that of the first means but opposite phase and wherein zeros in the cosine-modulated train delivered by the first means coincide with zeros in the cosine-modulated train delivered by the second means, and electronic switching means operative to select and deliver to an output terminal in contiguous successive time intervals a first cosine lobe derived from the second means, a second cosine lobe derived from the first means, and a third cosine lobe derived from the second means.
Claim 2
Dependent Claim
154 words
A blending function generator as defined herein comprising first means for delivering a cosine-modulated train of radio frequency energy wherein each cosine-modulated lobe has a period 2T seconds where T 1/mn where m is a number and n is a whole number, second means for delivering a cosine-modulated train of radio frequency energy wherein each cosine-modulated lobe has a period T seconds, wherein the radio frequency energy of the second means has the same frequency as that of the first means but opposite phase and wherein zeros in the cosine-modulated train delivered by the first means coincide with zeros in the cosine-modulated train delivered by the second means, and electronic switching means operative to select and deliver to an output terminal in contiguous successive time intervals a first cosine lobe derived from the second means, a second cosine lobe derived from the first means, and a third cosine lobe derived from the second means.
Claim 3
Dependent Claim
38 words
In a DVOR beacon in which a plurality of antenna elements is electronically commutated to an energizing source, a blending function generator as claimed in claim 1 wherein T 1/30n where n is the number of antenna elements.
References Cited (Backward Citations)
US3613096A
Cited
US3728729A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-21 | 1979-01-20 | 1979-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-21 | 1983-01-20 | 1983-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-21 | 1987-01-20 | 1987-07-22 | $7700.00 | Window Closed / Lapsed |