Patent US3750184A successfully refreshed from Google Patents.
US3750184A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Super-balanced feed-through dipole antenna
Assignee: TDK Micronas GmbH
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Filing: 1972-01-12
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Granted: 1973-07-31
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Expires: 1992-01-12
Abstract
Abstract The invention provides a novel LOS dipole antenna arrangement which permits substantial improvement in pattern characteristics by correspondingly reducing spurious coupling to adjacent structure, which may occur particularly where the antenna is situated closely adjacent to unrelated structure in a spacerestricted environment. Pattern improvement is based on the principle of the antenna''s symmetry being rigorously maintained, wherein a pair of adjacently arranged cylindrical radiators are fed by a double-ended balun structure created from the supporting and cable feed-through antenna mast. This balun feed assembly comprises a pair of oppositely arranged slots within the antenna cylindrical radiators, with each conductor of the coaxial feed cable running to the balun being coupled to either side of one of the slots proximate the center thereof. The excitation energy is transferred to the cylindrical radiators by way of symmetrically placed radial posts extending from either side of the energycoupled slot to the inside of the cylinders.
Inventors
- 👤 J Kuecken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:15
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/16
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
136 words
A dipole antenna arrangement comprising: (a) a radiating assembly disposed coaxially of a main axis, said radiating assembly including a pair of adjacent open-ended cylindrical radiators arranged about said main axis and spaced apart a predetermined separation; and (b) an energy feeding arrangement concentrically arranged about said main axis and extending through said cylindrical radiators to be coaxial therewith, and coupled to said radiating assembly, said energy feeding arrangement including a balun assembly for providing a balanced impedance feed to said radiating assembly, and a pair of energy transport means arranged within and associated in one-to-one correspondence with said pair of cylindrical radiators, said pair of energy transport means being disposed between said balun assembly and the respective ones of said cylindrical radiators to electrically couple to the latter the excitation energy from said balun assembly.
Claim 2
Dependent Claim
136 words
A dipole antenna arrangement comprising: (a) a radiating assembly disposed coaxially of a main axis, said radiating assembly including a pair of adjacent open-ended cylindrical radiators arranged about said main axis and spaced apart a predetermined separation; and (b) an energy feeding arrangement concentrically arranged about said main axis and extending through said cylindrical radiators to be coaxial therewith, and coupled to said radiating assembly, said energy feeding arrangement including a balun assembly for providing a balanced impedance feed to said radiating assembly, and a pair of energy transport means arranged within and associated in one-to-one correspondence with said pair of cylindrical radiators, said pair of energy transport means being disposed between said balun assembly and the respective ones of said cylindrical radiators to electrically couple to the latter the excitation energy from said balun assembly.
Claim 3
Dependent Claim
37 words
The arrangement according to claim 1 wherein said balun assembly constitutes a portion of the hollow mast for supporting the antenna arrangement, said portion having a pair of oppositely arranged elongated slot apertures cut into the mast.
Claim 4
Dependent Claim
61 words
The arrangement according to claIm 2 wherein the feed to said arrangement is coaxial, with the outer conductor being coupled to one side of one of said slots substantially in the center of the longitudinal dimension thereof and the inner conductor being coupled to the other side of said one slot also substantially in the center of the longitudinal dimension thereof.
Claim 5
Dependent Claim
42 words
The arrangement according to claim 3 wherein said pair of cylindrical radiators is oriented relative to said slots such that the coaxial feed coupling to said one slot is positioned substantially at the center of the gap G formed between said cylinders.
Claim 6
Dependent Claim
51 words
The arrangement according to claim 3 wherein each of said slots has a predetermined longitudinal dimension X, and wherein the total longitudinal dimension Y between the remote ends of said pair of radiated cylinders is predetermined, both said X and Y dimensions being selectable in accordance with desired optimum operating conditions.
Claim 7
Dependent Claim
56 words
The arrangement according to claim 4 wherein said pair of energy transport means constitutes a pair of radially arranged energy transport posts, each of which is arranged a predetermined distance s away from the center of the gap G between said radiated cylinders and on either side, and on opposite sides of said coaxially coupled slot.
Claim 8
Dependent Claim
18 words
The arrangement according to claim 6 wherein said distance s is variable to correspondingly change the tap-off impedance.
Claim 9
Dependent Claim
17 words
The arrangement according to claim 7 wherein said radially arranged posts are less than 1/8 lambda long.
Claim 10
Dependent Claim
29 words
The arrangement according to claim 3 wherein said balun assembly permits the through passage of unrelated feed cabling running to other antennas positioned further along the antenna support mast.
Claim 11
Dependent Claim
23 words
The arrangement according to claim 4 wherein said pair of energy transport means constitutes a pair of electrically conductive segments of a cone.
Claim 12
Dependent Claim
26 words
The arrangement according to claim 10 wherein the operative size range of said segments of cone is at least 1/4 segment to 3/4 segment of cone.
Claim 13
Dependent Claim
35 words
The arrangement according to claim 4 wherein an adjustable trimmer capacitance is inserted in the center conductor feed line, with one side thereof being coupled directly to the one side of said coaxially coupled slot.
Claim 14
Dependent Claim
53 words
The arrangement according to claim 4 further including a pair of dielectric washer-shaped wafers each of which is transversely disposed about said balun assembly and within a corresponding one of said radiating cylinders near the end thereof remote from said energy transport means, said wafers providing additional structural stability to the antenna arrangement.
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) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |