US3737907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiband quad and loop antenna
Assignee: MINI PRODUCTS Inc
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Filing: 1971-06-30
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Granted: 1973-06-05
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Expires: 1991-06-30
Abstract
Abstract An antenna which incorporates a single four-sided radiating element or loop in conjunction with series or parallel connected loading units to cover a multiple of operating frequencies.
Inventors
- 👤 W Monola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:38
CPC Classifications
H; H01; H01Q; H01Q5/00; H01Q5/30; H01Q5/307; H01Q5/314; H01Q5/321
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
160 words
An antenna comprising a radiator consisting of a single continuous loop of wire forming a geometrical configuration and having two spaced ends adjacent each other, and having a total distance around the loop of approximately one wave length at a predetermined frequency, two terminals disposed adjacent each other, one said terminal being connected to one said end and the other said terminal being connected to the other said end of said loop, said radiator having a pair of loading units each comprising a series connected inductor and loading capacitor mounted 180* apart at the high voltage points of said radiator and being connected thereto to extend outwardly along an axis of symmetry, said inductors having a sufficiently high impedance to act as a radio frequency choke at said predetermined frequency, said inductors and said loading capacitors acting as an additional electrical length to said radiator at a lower frequency than said predetermined frequency, thus providing operation on two different frequencies.
Claim 2
Dependent Claim
160 words
An antenna comprising a radiator consisting of a single continuous loop of wire forming a geometrical configuration and having two spaced ends adjacent each other, and having a total distance around the loop of approximately one wave length at a predetermined frequency, two terminals disposed adjacent each other, one said terminal being connected to one said end and the other said terminal being connected to the other said end of said loop, said radiator having a pair of loading units each comprising a series connected inductor and loading capacitor mounted 180* apart at the high voltage points of said radiator and being connected thereto to extend outwardly along an axis of symmetry, said inductors having a sufficiently high impedance to act as a radio frequency choke at said predetermined frequency, said inductors and said loading capacitors acting as an additional electrical length to said radiator at a lower frequency than said predetermined frequency, thus providing operation on two different frequencies.
Claim 3
Dependent Claim
80 words
The antenna recited in claim 1 wherein a second inductor with a loading capacitor in series therewith is connected in series with said first mentioned inductor and loading capacitor, said second inductor being of a value to act as a radio frequency choke at said lower frequency and to act as an additional electrical length to said radiator and said first inductor and loading capacitor at a still lower frequency then said lower frequency, thus allowing operations on three frequencies.
Claim 4
Dependent Claim
36 words
The antenna recited in claim 2 wherein a third inductor and loading capacitor are connected in series with each other and with said second inductor and said second loading capacitor, thus allowing operation on four frequencies.
Claim 5
Dependent Claim
53 words
The antenna recited in claim 2 wherein a third inductor with a loading capacitor in series therewith is connected in parallel at the inductor end with said first mentioned inductor and to said radiator and acting as an additional electrical length to said radiator at a frequency lower than said radiator''s predetermined frequency.
Claim 6
Dependent Claim
81 words
The antenna recited in claim 1 wherein a second inductor with a loading capacitor in series therewith is connected in parallel at the inductor end with said first mentioned inductor and to said radiator, said second inductor and capacitor being of a value to act as a radio frequency choke at said lower frequency and to act as an additional electrical lenGth to said radiator at a still lower frequency than said lower frequency and thus allowing operation on three frequencies.
Claim 7
Dependent Claim
42 words
The antenna recited in claim 5 wherein a third inductor with a loading capacitor in series therewith is connected in parallel at the inductor end with said first and second mentioned inductors and to said radiator, thus providing operation on four frequencies.
Claim 8
Dependent Claim
45 words
The antenna recited in claim 1 wherein a multiple of inductors with loading capacitors in series therewith are connected in parallel at the inductor end with said first mentioned inductor and to said radiator to provide a multiple of frequencies lower than said radiator frequency.
References Cited (Backward Citations)
US2657312A
Cited
US3623110A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |