US3740753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiband quad and loop antenna
Assignee: MINI PROD Inc
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Filing: 1972-02-28
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Granted: 1973-06-19
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Expires: 1992-02-28
Abstract
Abstract The specification discloses a structure of a single and a dual band antenna utilizing two loading units, each comprising a single inductor and a single capacitor connected in series therewith and mounted 180* apart at the high voltage points of the quad or loop antenna, and with the feed point midway between.
Inventors
- 👤 W Monola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:39
CPC Classifications
H; H01; H01Q; H01Q5/00; H01Q5/30; H01Q5/307; H01Q5/314; H01Q5/321
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
174 words
An antenna comprising a radiator consisting of a single continuous loop of wire having two spaced ends defining terminals and forming a geometrical configuration having a total distance around the said loop of one wavelength at the higher of two frequencies, said radiator having loading units supported 180* apart and 90* from said terminals at the high voltage points of said radiator and connected to said radiator, said loading units each consisting of a coil and a capacitor unit connected in series with said coil, said coil and said loading capacitor each acting as an additional electrical length to said radiator at the lower predetermined frequency, said radiator having its high voltage points supported on a rigid insulating support member extending across said loop, and said loading units being supported on opposite ends of said support member, said loading units being in the form of a coil and a straight metallic capacitor extending colinearly with the support, one end of said coil being electrically connected to said radiator at said high voltage point thereof.
Claim 2
Dependent Claim
174 words
An antenna comprising a radiator consisting of a single continuous loop of wire having two spaced ends defining terminals and forming a geometrical configuration having a total distance around the said loop of one wavelength at the higher of two frequencies, said radiator having loading units supported 180* apart and 90* from said terminals at the high voltage points of said radiator and connected to said radiator, said loading units each consisting of a coil and a capacitor unit connected in series with said coil, said coil and said loading capacitor each acting as an additional electrical length to said radiator at the lower predetermined frequency, said radiator having its high voltage points supported on a rigid insulating support member extending across said loop, and said loading units being supported on opposite ends of said support member, said loading units being in the form of a coil and a straight metallic capacitor extending colinearly with the support, one end of said coil being electrically connected to said radiator at said high voltage point thereof.
Claim 3
Dependent Claim
80 words
The antenna recited in claim 1 wherein said support member is in the form of a tube and said coil is supported on a cylindrical coil form, end of said cylindrical coil form being received in an end of said tube, and a screw connecting said coil to said radiator, said screw extending through said support member into said coil form, and said capacitor being rigidly fixed to the distant end of said coil form and connected to said coil.
Claim 4
Dependent Claim
15 words
The antenna recited in claim 2 wherein said capacitor comprises two parts telescopically connected together.
Claim 5
Dependent Claim
22 words
The antenna recited in claim 1 wherein said coil and said capacitor are self supporting and said coil is helical in shape.
Claim 6
Dependent Claim
66 words
The antenna recited in claim 2 wherein said coil form is tubular and has an insert in its outer end, and said capacitor is threadably received in said insert, and said coil is electrically connected to said capacitor by a second screw extending through said coil form and into said insert and having an end of said coil connected to said screw and to said capacitor.
Claim 7
Dependent Claim
24 words
The antenna recited in claim 1 wherein said capacitors are made of elongated members telescopically connected together whereby the said antenna can be adjusted.
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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |