US3613033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Broad-band high-frequency low-pass filters
Assignee: Individual
•
Filing: 1968-05-20
•
Granted: 1971-10-12
•
Expires: 1988-05-20
Abstract
Abstract Broad-band high-frequency low-pass filters formed with capacitors which have structures including multilayer and ceramic types and monolayer capacitors. A passive element such as magnetic cores are contained wholly or partially within the capacitor structure. The filter units which may themselves form complete PI filters or L filters may also be combined as the inside portion of a tubular multilayer ceramic capacitor. Rolled capacitors may be used for distributed inductance and magnetic cores in combination with wound inductors or individually may be formed as portions of the filters.
Inventors
- 👤 Peter A Denes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:21
CPC Classifications
H; H01; H01G; H01G2/00; H03; H03H; H03H1/00; H03H1/0007; H03H2001/0021; H03H2001/0035; Y; Y10; Y10T; Y10T29/00; Y10T29/43; Y10T29/435
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
126 words
A broad-band high-frequency low-pass filter for blocking high-frequency interference from below 1 megahertz up to very high frequencies comprising at least one tubular multilayer ceramic capacitor, and at least one passive component having at least a portion of said component within said tubular multilayer capacitor including at least one inductor means wound about a magnetic core which has resonance effects within the frequency range from at least 1 to 100 megahertz, said multilayer capacitor having an inner diameter adapted to receive said portion of said passive component, the ratio between inside and outside diameters of said tubular multilayer capacitor being such that capacitance decrease is fractional whereby the corresponding decrease in attenuation of said filter is only a minimal number of decibels over said frequency range.
Claim 2
Dependent Claim
126 words
A broad-band high-frequency low-pass filter for blocking high-frequency interference from below 1 megahertz up to very high frequencies comprising at least one tubular multilayer ceramic capacitor, and at least one passive component having at least a portion of said component within said tubular multilayer capacitor including at least one inductor means wound about a magnetic core which has resonance effects within the frequency range from at least 1 to 100 megahertz, said multilayer capacitor having an inner diameter adapted to receive said portion of said passive component, the ratio between inside and outside diameters of said tubular multilayer capacitor being such that capacitance decrease is fractional whereby the corresponding decrease in attenuation of said filter is only a minimal number of decibels over said frequency range.
Claim 3
Dependent Claim
15 words
The filter of claim 1, further characterized by said multilayer capacitor being of large capacitance.
Claim 4
Dependent Claim
74 words
The filter of claim 1, further characterized by a conducting cap on one side of said tubular capacitor, a conducting washer on the opposite end of said tubular capacitor, a first insulating washer adjacent the outer surface of said conducting cap, and a second insulating washer adjacent the outer surface of said conducting washer, said inductor means being a wire conductor forming a winding enclosing said tubular capacitor and passing through said magnetic core.
Claim 5
Dependent Claim
23 words
The filter of claim 1, further characterized by said tubular multilayer capacitor being of dielectric material having a high dielectric constant exceeding 30.
Claim 6
Dependent Claim
96 words
The filter of claim 1, further characterized by said at least one tubular multilayer capacitor having a first set of electrodes and a second set of electrodes, said first set of electrodes including an outside electrode along the outer surface of said tubular capacitor and embedded electrodes within the material of said tubular capacitor, said second set of electrodes including at least to inside electrodes along the inner surface of said tubular capacitor and embedded electrodes within the material of said tubular capacitor in positions extending adjacent said embedded electrodes of said first set of electrodes.
Claim 7
Dependent Claim
31 words
The filter of claim 1, further characterized by said at least one passive component of the filter being a magnetic core having a plurality of windings formed by a wire conductor.
Claim 8
Dependent Claim
46 words
The filter of claim 6, further characterized by said at least one tubular multilayer capacitor having an electrode on its inner circumferential surface, a shoulder on a terminal of said filter connected to said electrode, and one end of said wire conductor connected to said shoulder.
Claim 9
Dependent Claim
28 words
The filter of claim 6, further characterized by an additional magnetic core being another passive component of the filter, said wire conductor passing through said additional magnetic core.
Claim 10
Dependent Claim
52 words
The filter of claim 6, further characterized by a terminal of the filter and one end of said wire conductor connected to said terminal, an additional magnetic core being another passive component of the filter with at least a portion within said tubular multilayer capacitor, said terminal passing through said magnetic core.
Claim 11
Dependent Claim
36 words
The filter of claim 9, further characterized by said tubular multilayer capacitor having at least two separate electrodes along its inner circumferential surface, only one of said electrodes connected electrically to said terminal of the filter.
Claim 12
Dependent Claim
21 words
The filter of claim 1, further characterized by a filter section having at least a portion within said tubular multilayer capacitor.
Claim 13
Dependent Claim
65 words
The filter of claim 11, further characterized by said filter section including a tubular capacitor, at least two magnetic cores within said tubular capacitor, a wire conductor forming a plurality of windings around at least one of said magnetic cores and passing through at least another of said magnetic cores, said wire conductor having its opposite ends connected to opposite terminals of said filter section.
Claim 14
Dependent Claim
62 words
The filter of claim 11, further characterized by a first conducting cap having an indentation in its side attached to said tubular multilayer capacitor, a solder ring carried in said indentation, a conducting washer attached to the opposite side of said tubular multilayer capacitor from said conducting cap, and wire ends extending from said wound inductor through said conducting cap and washer.
Claim 15
Dependent Claim
27 words
The filter of claim 13, further characterized by an insulating washer overlaying said first conducting cap whereby said conducting cap is insulated from an adjacent connected filter.
Claim 16
Dependent Claim
73 words
The filter of claim 13, further characterized by a second multilayer tubular capacitor in adjacent relationship to said first capacitor, a second conducting cap attached to said second capacitor in adjacent contacting relationship with said first conducting cap, a second conducting washer attached to the opposite end of said second capacitor from said second conducting capacitor, said wound inductor having at least a portion extending into each of said first and second capacitors.
Claim 17
Dependent Claim
15 words
The filter of claim 13, further characterized by a casing connected to said conducting cap.
Claim 18
Dependent Claim
22 words
The filter of claim 16, further characterized by a plastic covering between said wire conductor windings enclosing said capacitor and said casing.
Claim 19
Dependent Claim
30 words
The filter of claim 17, further characterized by said tubular capacitor having an electrode on its outer circumferential surface, and a pair of separate electrodes on its inner circumferential surface.
References Cited (Backward Citations)
US2440652A
Cited
US2721311A
Cited
US3436693A
Cited
US3289118A
Cited
US3235939A
Cited
US3329911A
Cited
US3320557A
Cited
US3243738A
Cited
US3456215A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |