US5046132A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Open field test site reference antenna with integral battery powered signal generator
Assignee: CK CONSULTANTS Inc A CORPOF
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Filing: 1989-05-19
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Granted: 1991-09-03
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Expires: 2009-05-19
Abstract
Abstract A calibrator circuit for a self-contained device for vertification of open field test site accuracy. This device generates a broadband width of discrete frequencies from 10 MHz to 1000 MHz which is then radiated into space. The circuit contains a power supply subcircuit, an oscillator subcircuit which generates an output signal rich in harmonics, an antenna radiating element and a balun network to couple the output from the oscillator subcircuit to the antenna element.
Inventors
- 👤 Ralph P. Trefney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:11
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/02; H04B1/04; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/16
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
82 words
A circuit for emitting precise and unvarying electrical signals over a broadband range of frequencies, comprising: an antenna element for radiating said signals over said broadband of frequencies; a power supply subcircuit; a voltage regulating subcircuit coupled to said power supply subcircuit; an oscillator subcircuit, having an output signal with a rise time faster than 10 nanoseconds to emit said broadband range of frequencies, coupled to said voltage regulating subcircuit; and a balun network coupling said oscillator subcircuit to said antenna element.
Claim 2
Dependent Claim
82 words
A circuit for emitting precise and unvarying electrical signals over a broadband range of frequencies, comprising: an antenna element for radiating said signals over said broadband of frequencies; a power supply subcircuit; a voltage regulating subcircuit coupled to said power supply subcircuit; an oscillator subcircuit, having an output signal with a rise time faster than 10 nanoseconds to emit said broadband range of frequencies, coupled to said voltage regulating subcircuit; and a balun network coupling said oscillator subcircuit to said antenna element.
Claim 3
Dependent Claim
75 words
A circuit for emitting precise and unvarying electrical signals over a broadband range of frequencies, comprising: an antenna element for radiating said signals over said broadband of frequencies; a power supply subcircuit; a voltage regulating subcircuit coupled to said power supply subcircuit; an oscillator subcircuit having an output signal with a rise time faster than 10 nanoseconds coupled to said voltage regulating subcircuit; and a balun network coupling said oscillator subcircuit to said antenna element.
Claim 4
Dependent Claim
75 words
A circuit for emitting precise and unvarying electrical signals over a broadband range of frequencies, comprising: an antenna element for radiating said signals over said broadband of frequencies; a power supply subcircuit; a voltage regulating subcircuit coupled to said power supply subcircuit; an oscillator subcircuit having an output signal with a rise time faster than 10 nanoseconds coupled to said voltage regulating subcircuit; and a balun network coupling said oscillator subcircuit to said antenna element.
Claim 5
Dependent Claim
24 words
A circuit as in claim 2 wherein said output signal of said oscillator subcircuit has a fall time substantially equal to said rise time.
Claim 6
Dependent Claim
19 words
A circuit as in claim 3 wherein said output signal of said oscillator subcircuit is substantially a square wave.
Claim 7
Dependent Claim
24 words
A circuit as in claim 2 wherein said balun network comprises a pair of coils wound in a bifilar manner around a core material.
Claim 8
Dependent Claim
25 words
A circuit as in claim 5 wherein said core material has a magnetic permeability so to impedance match said oscillator subcircuit with said antenna element.
Claim 9
Dependent Claim
18 words
A circuit as in claim 6 wherein said core material has a permeability of approximately 700μ i .
Claim 10
Dependent Claim
31 words
A circuit as in claim 5 wherein said core material is selected so that said balun network can transmit a broadband of frequencies from said oscillator subcircuit to said antenna element.
Claim 11
Dependent Claim
22 words
A circuit as in claim 8 wherein said broadband of frequencies has a range of at least 10 MHz to 1000 MHz.
Claim 12
Dependent Claim
15 words
A circuit as in claim 9 wherein said core material comprises iron, nickel and zinc.
Claim 13
Dependent Claim
17 words
A circuit as in claim 2 wherein said antenna element is in the form of a dipole.
Claim 14
Dependent Claim
14 words
A circuit as in claim 2 wherein said power supply subcircuit comprises a battery.
Claim 15
Dependent Claim
30 words
A circuit as in claim 12 wherein said power supply subcircuit comprises a jack for connection to an external power supply to provide an alternate power source to said battery.
Claim 16
Dependent Claim
33 words
A circuit as in claim 12 further comprising a power supply monitoring subcircuit coupled to an input terminal of said voltage regulating subcircuit said power supply monitoring subcircuit monitoring said power supply subcircuit.
Claim 17
Dependent Claim
25 words
A circuit as in claim 14 wherein said power supply monitoring subcircuit indicates when said power supply subcircuit falls below a predetermined output voltage level.
Claim 18
Dependent Claim
30 words
A circuit as in claim 14 wherein said power supply monitoring subcircuit has an LED, said LED flashing to indicate the state of said power supply subcircuit output voltage level.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-09-02 | 1995-03-04 | 1995-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-02 | 1999-03-04 | 1999-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-02 | 2003-03-04 | 2003-09-03 | $7700.00 | Window Closed / Lapsed |