Patent US3600711A successfully refreshed from Google Patents.
US3600711A
Expired / Lapsed
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Coaxial filter having harmonic reflective and absorptive means
Assignee: Varian Medical Systems Inc
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Filing: 1969-08-13
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Granted: 1971-08-17
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Expires: 1989-08-13
Abstract
Abstract A coaxial filter is disclosed. The filter includes a coaxial line having resonant reflector means carried from the outer conductor for reflecting harmonic wave energy toward the source while permitting fundamental wave energy to pass through the coaxial line to a load. A harmonic resonant means is disposed between the harmonic reflectors and the source for picking up and absorbing the harmonic energy in a load disposed externally of the outer conductor.
Inventors
- 👤 Richard Z Gerlack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:54
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/212; H01P1/201; H01P1/202
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
138 words
In a coaxial filter, means forming a coaxial line having an inner conductor and outer conductor for transmission of fundamental mode energy from a source to a load, means forming a wave reflective structure disposed in said coaxial line for reflecting harmonics of said fundamental mode energy toward the source, means coupled to said coaxial line between the source and said harmonic reflective means for picking up and absorbing reflected harmonic wave energy, THE IMPROVEMENT WHEREIN, said harmonic pickup and absorbing means include, resonant pickup means disposed on said outer conductor of said coaxial line, such pickup means being resonant at least at a respective one of said harmonics, load means disposed externally of said outer conductor, and means for coupling harmonic wave energy from said resonant pickup means to said load means for absorbing reflected harmonic energy.
Claim 2
Dependent Claim
138 words
In a coaxial filter, means forming a coaxial line having an inner conductor and outer conductor for transmission of fundamental mode energy from a source to a load, means forming a wave reflective structure disposed in said coaxial line for reflecting harmonics of said fundamental mode energy toward the source, means coupled to said coaxial line between the source and said harmonic reflective means for picking up and absorbing reflected harmonic wave energy, THE IMPROVEMENT WHEREIN, said harmonic pickup and absorbing means include, resonant pickup means disposed on said outer conductor of said coaxial line, such pickup means being resonant at least at a respective one of said harmonics, load means disposed externally of said outer conductor, and means for coupling harmonic wave energy from said resonant pickup means to said load means for absorbing reflected harmonic energy.
Claim 3
Dependent Claim
43 words
The apparatus of claim 1 wherein said resonant pickup means includes antenna means disposed inside said outer conductor and having a first pickup antenna tuned for resonance at the second harmonic, and a second pickup antenna tuned for resonance at the third harmonic.
Claim 4
Dependent Claim
30 words
The apparatus of claim 2 wherein said first and second pickup antenna are axially and circumferentially displaced from each other with respect to the longitudinal axis of said coaxial line.
Claim 5
Dependent Claim
76 words
The apparatus of claim 3 wherein said harmonic reflective means includes a plurality of resonant reflective antennas extending into said coaxial line from said outer conductor, said antennas being axially spaced along said coaxial line and including a plurality of axially aligned reflective antennas resonant at the second harmonic and a plurality of aligned reflective antennas resonant at the third harmonic, said second harmonic reflective antennas being circumferentially displaced relative to said third harmonic reflective antennas.
Claim 6
Dependent Claim
38 words
The apparatus of claim 1 wherein said resonant pickup means includes an antenna member affixed at one end to said outer conductor and curving to a free end in the circumferential direction between said inner and outer conductors.
Claim 7
Dependent Claim
53 words
The apparatus of claim 1 wherein said pickup means includes a conductive antenna member affixed at one end to said outer conductor of said coaxial line and extending to a free end in the axial direction of said coaxial line in the space between said inner and outer conductors of said coaxial line.
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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) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |