US4545059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antenna coupler system
Assignee: Boeing North American Inc
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Filing: 1984-03-27
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Granted: 1985-10-01
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Expires: 2004-03-27
Abstract
Abstract There is disclosed an antenna and coupling system for use in frequency hopping communication systems. The system includes a dual antenna configuration wherein the antennas are coupled in parallel to a tunable broadband coupler which provides a VSWR which is nominally less than 2:1 over the full hopping bandwidth of the system. The antenna and coupling system are so constructed that the coupler is operated over a plurality of passbands defining a broadband frequency range and each passband is of sufficient width such that several hopping band center frequencies can fall within a given passband. The passbands also overlap to permit continuous frequency coverage over the frequency range of the system.
Inventors
- 👤 R. Joe Spinks, Jr.
- 👤 Glenn R. Snider
- 👤 Richard E. Deasy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:31
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/69; H04B1/713
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
123 words
A broadband communications system comprising: means for generating a plurality of carrier frequencies within a band of frequencies; antenna means for transmitting said plurality of carrier frequencies; coupler means coupled between said means for generating and said antenna means for providing a tunable impedance match over said band of frequencies and including a plurality of passbands defining said band of frequencies; and means for controlling said means for generating and said coupler means for hopping said carrier frequency within said band of frequencies and changing said passbands of said coupler means to provide an impedance match in response to said frequency hopping in such a manner that multiple frequency hops occur within a single passband before the passband of said coupler is changed.
Claim 2
Dependent Claim
123 words
A broadband communications system comprising: means for generating a plurality of carrier frequencies within a band of frequencies; antenna means for transmitting said plurality of carrier frequencies; coupler means coupled between said means for generating and said antenna means for providing a tunable impedance match over said band of frequencies and including a plurality of passbands defining said band of frequencies; and means for controlling said means for generating and said coupler means for hopping said carrier frequency within said band of frequencies and changing said passbands of said coupler means to provide an impedance match in response to said frequency hopping in such a manner that multiple frequency hops occur within a single passband before the passband of said coupler is changed.
Claim 3
Dependent Claim
20 words
The system of claim 1 wherein said antenna means includes two 16-foot monopole antennas coupled in parallel with one another.
Claim 4
Dependent Claim
21 words
The system of claim 2 wherein said monopole antennas are each coupled to said coupler by a 125 ohm coaxial cable.
Claim 5
Dependent Claim
14 words
The system of claim 1 wherein said band of frequencies is from 2-30 MHz.
Claim 6
Dependent Claim
26 words
The system of claim 1 further including power amplifying means for amplifying said generated carrier frequencies and providing said amplified carrier frequencies through said coupler means.
Claim 7
Dependent Claim
39 words
The system of claim 1 wherein each passband of said coupler means is constructed to have an approximately 10% width about a center frequency, and wherein each passband in said band of frequencies overlaps adjacent passbands by approximately 2.5%.
Claim 8
Dependent Claim
19 words
The system of claim 1 wherein said coupler means is constructed to maintain a VSWR of less than 2:1.
Claim 9
Dependent Claim
125 words
A broadband communication system comprising: antenna means for receiving a plurality of modulated carrier frequencies over a band of frequencies; receiver means for receiving and demodulating said plurality of carrier frequencies received by said antenna means; tunable broadband coupler means coupled to impedance match said receiving means with said antenna means over said band of frequencies, said coupler means having a plurality of tunable passbands defining said band of frequencies; and means for controlling said receiver means and said coupler means for hopping said carrier frequency within said band of frequencies and changing the passbands of said coupler means to provide an impedance match in accordance with said frequency hopping such that multiple frequency hops occur within any selected passband before changing to another passband.
Claim 10
Dependent Claim
125 words
A broadband communication system comprising: antenna means for receiving a plurality of modulated carrier frequencies over a band of frequencies; receiver means for receiving and demodulating said plurality of carrier frequencies received by said antenna means; tunable broadband coupler means coupled to impedance match said receiving means with said antenna means over said band of frequencies, said coupler means having a plurality of tunable passbands defining said band of frequencies; and means for controlling said receiver means and said coupler means for hopping said carrier frequency within said band of frequencies and changing the passbands of said coupler means to provide an impedance match in accordance with said frequency hopping such that multiple frequency hops occur within any selected passband before changing to another passband.
Claim 11
Dependent Claim
19 words
The system of claim 8 wherein said antenna means includes two monopole antennas coupled in parallel with one another.
Claim 12
Dependent Claim
21 words
The system of claim 9 wherein said monopole antennas are each coupled to said coupler by a 125 ohm coaxial cable.
Claim 13
Dependent Claim
14 words
The system of claim 8 wherein said band of frequencies is from 2-30 MHz.
Claim 14
Dependent Claim
39 words
The system of claim 8 wherein each passband of said coupler means is constructed to have an approximately 10% width about a center frequency, and wherein each passband in said band of frequencies overlaps adjacent frequencies by approximately 2.5%.
Claim 15
Independent Claim
113 words
A method of providing frequency hopping transmissions comprising: generating a plurality of modulated carrier frequencies and hopping said carrier frequencies within a band of frequencies in accordance with a predetermined pattern; transmitting said carrier frequencies within said band of frequencies from dual antennas coupled in electrical parallel with one another; matching the impedance from said generating means to said parallel coupled antennas with a tunable broadband coupler having a pluralty of passbands defining said band of frequencies by changing said passbands to provide impedance matching with said band; and controlling said carrier frequency hopping and said change of passbands so that multiple hops occur within a selected passband before that passband is changed.
Claim 16
Independent Claim
113 words
A method of providing frequency hopping transmissions comprising: generating a plurality of modulated carrier frequencies and hopping said carrier frequencies within a band of frequencies in accordance with a predetermined pattern; transmitting said carrier frequencies within said band of frequencies from dual antennas coupled in electrical parallel with one another; matching the impedance from said generating means to said parallel coupled antennas with a tunable broadband coupler having a pluralty of passbands defining said band of frequencies by changing said passbands to provide impedance matching with said band; and controlling said carrier frequency hopping and said change of passbands so that multiple hops occur within a selected passband before that passband is changed.
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) | 1988-09-30 | 1989-04-01 | 1989-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-30 | 1993-04-01 | 1993-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-30 | 1997-04-01 | 1997-10-01 | $7700.00 | Window Closed / Lapsed |