Patent US3618103A successfully refreshed from Google Patents.
US3618103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plural antennas with impedance matching to couple to single leadin
Assignee: ANTENNACRAFT CO
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Filing: 1969-10-24
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Granted: 1971-11-02
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Expires: 1989-10-24
Abstract
Abstract An antenna array including a narrow band antenna tuned to a particular frequency and a transmission line type broadband antenna having a frequency response range which includes the frequency of the narrowband antenna. The transmission line of the broadband antenna is serially coupled between the narrowband antenna and reception apparatus. A parasitic element of a predetermined length is positioned at a predetermined point along the transmission line of the broadband antenna and serves to peak the frequency of the narrowband antenna thereby to pass signals from the narrowband antenna to the reception apparatus with minimum attenuation.
Inventors
- 👤 Robert S Ringland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:40
CPC Classifications
H; H01; H01Q; H01Q21/00; H01Q21/30; H01Q11/00; H01Q11/02; H01Q11/10; H01Q5/00; H01Q5/40; H01Q5/48; H01Q5/49
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
135 words
An antenna array comprising an antenna having an elongated two-conductor transmission line-type feeder, said antenna being of the split boom type with said two conductors being in spaced, parallel relationship and lying in a first plane, a plurality of pairs of dipole elements at spaced intervals along said feeder, one element of each pair being connected to one conductor of said feeder and the other element of each pair being connected to the other conductor, and a parasitic element electrically isolated from said feeder and extending transversely thereto, said parasitic element being disposed between said conductors and intersecting said first plane at right angles, said parasitic element further having a predetermined length and position along said feeder in the field thereof so as to peak the frequency response of said antenna at a predetermined frequency.
Claim 2
Dependent Claim
135 words
An antenna array comprising an antenna having an elongated two-conductor transmission line-type feeder, said antenna being of the split boom type with said two conductors being in spaced, parallel relationship and lying in a first plane, a plurality of pairs of dipole elements at spaced intervals along said feeder, one element of each pair being connected to one conductor of said feeder and the other element of each pair being connected to the other conductor, and a parasitic element electrically isolated from said feeder and extending transversely thereto, said parasitic element being disposed between said conductors and intersecting said first plane at right angles, said parasitic element further having a predetermined length and position along said feeder in the field thereof so as to peak the frequency response of said antenna at a predetermined frequency.
Claim 3
Dependent Claim
78 words
The array of claim 1 wherein the dipole elements connected to said one conductor alternately extend outwardly from opposite sides thereof and lie in a second plane, the dipole elements connected to said other conductor alternately extending outwardly from opposite sides thereof and lying in a third plane, said second and third planes being in spaced, parallel relationship with said parasitic element therebetween and parallel thereto, said parasitic element extending outwardly on either side of said first plane.
Claim 4
Dependent Claim
24 words
The array of claim 1 wherein said antenna is of the broadband, unidirectional type, said pairs of dipole elements being of progressively shorter length.
Claim 5
Dependent Claim
82 words
The array of claim 1 wherein said two conductors of said feeder have first and second terminal ends, and further comprising a second antenna having a frequency response within the range of said first-named antenna, a transmission line serially coupling said second antenna to said first terminal ends, said second terminal ends being adapted to be serially coupled to reception apparatus, said two conductors of said feeder forming a transmission line in series between said first-named transmission line and said reception apparatus.
Claim 6
Dependent Claim
75 words
The array of claim 4 wherein said first-named antenna is of the broadband type, said second antenna being of the narrow band type tuned to a frequency within the frequency range of said first antenna, the length and position of said parasitic element being selected to tune said feeder to the frequency to which said second antenna is tuned whereby said feeder passes signals from said second antenna to said reception apparatus with minimum attenuation.
Claim 7
Dependent Claim
50 words
The system of claim 5 further comprising a second parasitic element electrically isolated from said feeder and extending transversely thereto, said second parasitic element having a predetermined length and position along said feeder so as additionally to peak the frequency response of said first antenna at a second predetermined frequency.
Claim 8
Dependent Claim
33 words
The array of claim 5 wherein said first antenna is of the unidirectional type, said pairs of dipole elements being of progressively shorter length from said first and to said second terminal ends.
Claim 9
Dependent Claim
135 words
The array of claim 7 wherein said first antenna is of the split boom type with said two conductors being in spaced, parallel relationship and lying in a first plane, said parasitic element being disposed between said conductors and lying in a second plane normal to said first plane and parallel with said conductors, said parasitic element extending outwardly on either side of said first plane, the dipole elements connected to said one conductor alternately extending outwardly from opposite sides thereof and lying in a third plane, the dipole elements connected to said other conductor alternately extending outwardly from opposite sides thereof and lying in a fourth plane, said third and fourth planes being in spaced, parallel relationship with said second plane therebetween, said parasitic element extending Outwardly on either side of said first plane.
Claim 10
Dependent Claim
78 words
The array of claim 8 further comprising a second parasitic element electrically isolated from said feeder and extending transversely thereto, said second parasitic element being disposed between said conductors and lying in said second plane, said second parasitic element extending outwardly on either side of said fist plane, said second parasitic element having a predetermined length and position along sad feeder so as additionally to peak the frequency response of said first antenna at a second predetermined frequency.
Claim 11
Dependent Claim
130 words
A broadband antenna comprising a transmission line having front and rear terminal ends and a plurality of spaced antenna elements coupled thereto, and a parasitic element located in the field between predetermined ones of said antenna elements and having a predetermined length thereby to tune said transmission line to pass signals of a predetermined frequency from said front to said rear terminal ends with minimum attenuation, a narrow band antenna coupled in a series with said transmission line of said broadband antenna and tuned to a frequency within the range of said broadband antenna, said transmission line being adapted to be serially coupled to reception apparatus, said predetermined frequency being the frequency of said narrow band antenna whereby said transmission line passes signals of said predetermined frequency with minimum attenuation.
Claim 12
Dependent Claim
130 words
A broadband antenna comprising a transmission line having front and rear terminal ends and a plurality of spaced antenna elements coupled thereto, and a parasitic element located in the field between predetermined ones of said antenna elements and having a predetermined length thereby to tune said transmission line to pass signals of a predetermined frequency from said front to said rear terminal ends with minimum attenuation, a narrow band antenna coupled in a series with said transmission line of said broadband antenna and tuned to a frequency within the range of said broadband antenna, said transmission line being adapted to be serially coupled to reception apparatus, said predetermined frequency being the frequency of said narrow band antenna whereby said transmission line passes signals of said predetermined frequency with minimum attenuation.
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) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |