US4426631A
Expired / Lapsed
US
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Ceramic bandstop filter
Assignee: Motorola Solutions Inc
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Filing: 1982-02-16
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Granted: 1984-01-17
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Expires: 2002-02-16
Abstract
Abstract An embodiment of a unique ceramic bandstop filter is comprised of a dielectric plate having an input electrode disposed centrally on the top surface thereof and a dielectric block fixedly attached to the bottom surface of the plate and having a hole opposite the input electrode. The dielectric material is preferably a ceramic comprised of BaO, TiO 2 and ZrO 2 . The dielectric block is entirely plated with copper or silver except for a portion of the top surface surrounding the hole and is essentially a short-circuited coaxial transmission line. In another embodiment of the unique ceramic bandstop filter, a dielectric block has a hole extending between top and bottom surfaces thereof and an input electrode plated on the top surface near the hole. The dielectric block is entirely plated with copper or silver except for a portion of the top surface surrounding the input electrode and hole. Shunt capacitors or inductors can be plated on the top surface of both embodiments of the unique ceramic bandstop filter fr providing a bandstop/bandpass response characteristic.
Inventors
- 👤 Robert F. D'Avello
- 👤 Raymond L. Sokola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:51
CPC Classifications
H; H03; H03H; H03H5/00; H01; H01P; H01P1/00; H01P1/20; H01P1/201; H01P1/203; H01P1/20327; H01P1/20354; H01P1/20381
Claims Analysis
Total Claims: 47
Claim 1
Independent Claim
133 words
A bandstop filter comprising: first means comprised of a dielectric material and having top and bottom surfaces, said first dielectric means further including electrode means comprised of a conductive material disposed on the top surface; second means comprised of a dielectric material and having top and bottom surfaces, said second dielectric means further including a hole extending from the top surface to the bottom surface thereof, and said second dielectric means further being covered entirely with a conductive material with the exception of the top surface; and means for attaching the bottom surface of the first dielectric means to the top surface of the second dielectric means so that the electrode means on the top surface of the first dielectric means is arranged substantially opposite to the hole in the second dielectric means.
Claim 2
Dependent Claim
133 words
A bandstop filter comprising: first means comprised of a dielectric material and having top and bottom surfaces, said first dielectric means further including electrode means comprised of a conductive material disposed on the top surface; second means comprised of a dielectric material and having top and bottom surfaces, said second dielectric means further including a hole extending from the top surface to the bottom surface thereof, and said second dielectric means further being covered entirely with a conductive material with the exception of the top surface; and means for attaching the bottom surface of the first dielectric means to the top surface of the second dielectric means so that the electrode means on the top surface of the first dielectric means is arranged substantially opposite to the hole in the second dielectric means.
Claim 3
Dependent Claim
47 words
The bandstop filter according to claim 1, wherein the first dielectric means is comprised of a block of a dielectric material having the shape of a cylinder, and the second dielectric means is comprised of a block of a dielectric material having the shape of a cylinder.
Claim 4
Dependent Claim
47 words
The bandstop filter according to claim 1, wherein the first dielectric means is comprised of a block of a dielectric material having the shape of a parallelepiped, and the second dielectric means is comprised of a block of a dielectric material having the shape of a parallelepiped.
Claim 5
Dependent Claim
56 words
The bandstop filter according to claim 1, further including a signal source for generating an input signal with respect to signal ground, means for coupling the input signal to the electrode means on the top surface of the first dielectric means, and means for coupling the plated portion of the second dielectric means to signal ground.
Claim 6
Dependent Claim
20 words
The bandstop filter according to claim 4, further including shunt capacitive means coupled between the input signal and signal ground.
Claim 7
Dependent Claim
82 words
The bandstop filter according to claim 5, wherein said shunt capacitive means includes first electrode means comprised of a conductive material disposed on the top surface of the first dielectric means and second electrode means comprised of a conductive material disposed on the bottom surface of the first dielectric means substantially opposite to the first electrode means, the first electrode means being coupled to the electrode means of the first dielectric means, and the second electrode means being coupled to signal ground.
Claim 8
Dependent Claim
20 words
The bandstop filter according to claim 4, further including shunt inductive means coupled between the input signal and signal ground.
Claim 9
Dependent Claim
63 words
The bandstop filter according to claim 7, wherein said shunt inductive means includes strip electrode means comprised of a conductive material disposed on the top surface of the first dielectric means, one end of the strip electrode means being coupled to the electrode means of the first dielectric means, and the other end of the strip electrode means being coupled to signal ground.
Claim 10
Dependent Claim
29 words
The bandstop filter according to claim 1, wherein the electrode means on the top surface of the first dielectric means includes a plurality of fingers intercoupled at one end.
Claim 11
Dependent Claim
39 words
The bandstop filter according to claim 9, adapted to be tuned to attenuate a pre-selected range of frequencies by tuning means, said tuning means including means for triming the fingers of the electrode means for tuning said bandstop filter.
Claim 12
Dependent Claim
83 words
A bandstop filter comprising: means comprised of a dielectric material and having top and bottom surfaces, said dielectric means further including a hole extending from the top surface to the bottom surface thereof, and said dielectric means further being covered entirely with a conductive material with the exception of the top surface; and capacitive means including electrode means comprised of a conductive material disposed on the top surface of the dielectric means at a predetermined distance from the hole in the dielectric means.
Claim 13
Dependent Claim
83 words
A bandstop filter comprising: means comprised of a dielectric material and having top and bottom surfaces, said dielectric means further including a hole extending from the top surface to the bottom surface thereof, and said dielectric means further being covered entirely with a conductive material with the exception of the top surface; and capacitive means including electrode means comprised of a conductive material disposed on the top surface of the dielectric means at a predetermined distance from the hole in the dielectric means.
Claim 14
Dependent Claim
26 words
The bandstop filter according to claim 11, wherein the dielectric means is comprised of a block of a dielectric material having the shape of a cylinder.
Claim 15
Dependent Claim
26 words
The bandstop filter according to claim 11, wherein the dielectric means is comprised of a block of a dielectric material having the shape of a parallelepiped.
Claim 16
Dependent Claim
54 words
The bandstop filter according to claim 11, further including a signal source for generating an input signal with respect to signal ground, means for coupling the input signal to the electrode means on the top surface of the dielectric means, and means for coupling the plated portion of the dielectric means to signal ground.
Claim 17
Dependent Claim
20 words
The bandstop filter according to claim 14, further including shunt capacitive means coupled between the input signal and signal ground.
Claim 18
Dependent Claim
47 words
The bandstop filter according to claim 15, wherein said shunt capacitive means includes electrode means comprised of a conductive material disposed on the top surface of the dielectric means at a predetermined distance from the electrode means of the capacitive means and being coupled to signal ground.
Claim 19
Dependent Claim
41 words
The bandstop filter according to claim 16, adapted to be tuned to pass a pre-selected range of frequencies by tuning means, said tuning means including means for trimming the electrode means of the shunt capacitive means for tuning said bandstop filter.
Claim 20
Dependent Claim
20 words
The bandstop filter according to claim 14, further including shunt inductive means coupled between the input signal and signal ground.
Claim 21
Dependent Claim
61 words
The bandstop filter according to claim 18, wherein said shunt inductive means including strip electrode means comprised of a conductive material disposed on the top surface of the dielectric means, one end of the strip electrode means being coupled to the electrode means of the capacitive means, and the other end of the strip electrode means being coupled to signal ground.
Claim 22
Dependent Claim
42 words
The bandstop filter according to claim 19, adapted to be tuned to pass a pre-selected range of frequencies by tuning means, said tuning means including means for triming the strip electrode means of the shunt inductive means for tuning said bandstop filter.
Claim 23
Dependent Claim
32 words
The bandstop filter according to claim 11, adapted to be tuned to attenuate a pre-selected range of frequencies, said tuning means including means for triming the electrode means of the capacitive means.
Claim 24
Dependent Claim
160 words
A bandpass/bandstop filter comprising: first means comprised of a dielectric material and having parallel, flat, top and bottom surfaces, said first dielectric means further including input electrode means comprised of a conductive material plated on the top surface; second means comprised of a dielectric material and having parallel, flat, top and bottom surfaces, said second dielectric means further including a hole extending from the top surface to the bottom surface thereof, and said second dielectric means further being plated entirely with a conductive material with the exception of the top surface; means for attaching the bottom surface of the first dielectric means to the top surface of the second dielectric means so that the input electrode means on the top surface of the first dielectric means is arranged substantially opposite to the hole in the second dielectric means; and shunt capacitive means coupled between the input electrode means on the top surface of the first dielectric means and signal ground.
Claim 25
Dependent Claim
160 words
A bandpass/bandstop filter comprising: first means comprised of a dielectric material and having parallel, flat, top and bottom surfaces, said first dielectric means further including input electrode means comprised of a conductive material plated on the top surface; second means comprised of a dielectric material and having parallel, flat, top and bottom surfaces, said second dielectric means further including a hole extending from the top surface to the bottom surface thereof, and said second dielectric means further being plated entirely with a conductive material with the exception of the top surface; means for attaching the bottom surface of the first dielectric means to the top surface of the second dielectric means so that the input electrode means on the top surface of the first dielectric means is arranged substantially opposite to the hole in the second dielectric means; and shunt capacitive means coupled between the input electrode means on the top surface of the first dielectric means and signal ground.
Claim 26
Dependent Claim
47 words
The bandstop/bandpass filter according to claim 22, wherein the first dielectric means is comprised of a block of a dielectric material having the shape of a cylinder, and the second dielectric means is comprised of a block of a dielectric material having the shape of a cylinder.
Claim 27
Dependent Claim
47 words
The bandstop/bandpass filter according to claim 22, wherein the first dielectric means is comprised of a block of a dielectric material having the shape of a parallelepiped, and the second dielectric means is comprised of a block of a dielectric material having the shape of a parallelepiped.
Claim 28
Dependent Claim
57 words
The bandstop/bandpass filter according to claim 22, further including a signal source for generating an input signal with respect to signal ground, means for coupling the input signal to the input electrode means on the top surface of the first dielectric means, and means for coupling the plated portion of the second dielectric means to signal ground.
Claim 29
Dependent Claim
78 words
The bandstop/bandpass filter according to claim 22, wherein said shunt capacitive means includes first electrode means comprised of a conductive material plated on the top surface of the first dielectric means and second electrode means comprised of a conductive material plated on the bottom surface of the first dielectric means substantially opposite to the first electrode means, the first electrode means being coupled to the input electrode means, and the second electrode means being coupled to signal ground.
Claim 30
Dependent Claim
160 words
A bandstop/bandpass filter comprising: first means comprised of a dielectric material and having parallel, flat, top and bottom surfaces, said first dielectric means further including input electrode means comprised of a conductive material plated on the top surface; second means comprised of a dielectric material and having parallel, flat, top and bottom surfaces, said second dielectric means further including a hole extending from the top surface to the bottom surface thereof, and said second dielectric means further being plated entirely with a conductive material with the exception of the top surface; means for attaching the bottom surface of the first dielectric means to the top surface of the second dielectric means so that the input electrode means on the top surface of the first dielectric means is arranged substantially opposite to the hole in the second dielectric means; and shunt inductive means coupled between the input electrode means on the top surface of the first dielectric means and signal ground.
Claim 31
Dependent Claim
160 words
A bandstop/bandpass filter comprising: first means comprised of a dielectric material and having parallel, flat, top and bottom surfaces, said first dielectric means further including input electrode means comprised of a conductive material plated on the top surface; second means comprised of a dielectric material and having parallel, flat, top and bottom surfaces, said second dielectric means further including a hole extending from the top surface to the bottom surface thereof, and said second dielectric means further being plated entirely with a conductive material with the exception of the top surface; means for attaching the bottom surface of the first dielectric means to the top surface of the second dielectric means so that the input electrode means on the top surface of the first dielectric means is arranged substantially opposite to the hole in the second dielectric means; and shunt inductive means coupled between the input electrode means on the top surface of the first dielectric means and signal ground.
Claim 32
Dependent Claim
47 words
The bandstop/bandpass filter according to claim 27, wherein the first dielectric means is comprised of a block of a dielectric material having the shape of a cylinder, and the second dielectric means is comprised of a block of a dielectric material having the shape of a cylinder.
Claim 33
Dependent Claim
47 words
The bandstop/bandpass filter according to claim 27, wherein the first dielectric means is comprised of a block of a dielectric material having the shape of a parallelepiped, and the second dielectric means is comprised of a block of a dielectric material having the shape of a parallelepiped.
Claim 34
Dependent Claim
57 words
The bandstop/bandpass filter according to claim 27, further including a signal source for generating an input signal with respect to signal ground, means for coupling the input signal to the input electrode means on the top surface of the first dielectric means, and means for coupling the plated portion of the second dielectric means to signal ground.
Claim 35
Dependent Claim
59 words
The bandstop/bandpass filter according to claim 27, wherein said shunt inductive means includes strip electrode means comprised of a conductive material plated on the top surface of the first dielectric means, one end of the strip electrode means being coupled to the input electrode means, and the other end of the strip electrode means being coupled to signal ground.
Claim 36
Dependent Claim
96 words
A bandstop filter comprising: means comprised of a dielectric material and having parallel, flat, top and bottom surfaces, said dielectric means further including a hole extending from the top surface to the bottom surface thereof, and said dielectric means further being plated entirely with a conductive material with the exception of the top surface; capacitive means including electrode means comprised of a conductive material plated on the top surface of the dielectric means at a predetermined distance from the hole in the dielectric means; and shunt capacitive means coupled between the electrode means and signal ground.
Claim 37
Dependent Claim
96 words
A bandstop filter comprising: means comprised of a dielectric material and having parallel, flat, top and bottom surfaces, said dielectric means further including a hole extending from the top surface to the bottom surface thereof, and said dielectric means further being plated entirely with a conductive material with the exception of the top surface; capacitive means including electrode means comprised of a conductive material plated on the top surface of the dielectric means at a predetermined distance from the hole in the dielectric means; and shunt capacitive means coupled between the electrode means and signal ground.
Claim 38
Dependent Claim
26 words
The bandstop filter according to claim 32, wherein the dielectric means is comprised of a block of a dielectric material having the shape of a cylinder.
Claim 39
Dependent Claim
26 words
The bandstop filter according to claim 32, wherein the dielectric means is comprised of a block of a dielectric material having the shape of a parallelepiped.
Claim 40
Dependent Claim
54 words
The bandstop filter according to claim 32, further including a signal source for generating an input signal with respect to signal ground, means for coupling the input signal to the electrode means on the top surface of the dielectric means, and means for coupling the plated portion of the dielectric means to signal ground.
Claim 41
Dependent Claim
47 words
The bandstop filter according to claim 32, wherein said shunt capacitive means includes electrode means comprised of a conductive material plated on the top surface of the dielectric means at a predetermined distance from the electrode means of the capacitive means and being coupled to signal ground.
Claim 42
Dependent Claim
96 words
A bandstop filter comprising: means comprised of a dielectric material and having parallel, flat, top and bottom surfaces, said dielectric means further including a hole extending from the top surface to the bottom surface thereof, and said dielectric means further being plated entirely with a conductive material with the exception of the top surface; capacitive means including electrode means comprised of a conductive material plated on the top surface of the dielectric means at a predetermined distance from the hole in the dielectric means; and shunt inductive means coupled between the electrode means and signal ground.
Claim 43
Dependent Claim
96 words
A bandstop filter comprising: means comprised of a dielectric material and having parallel, flat, top and bottom surfaces, said dielectric means further including a hole extending from the top surface to the bottom surface thereof, and said dielectric means further being plated entirely with a conductive material with the exception of the top surface; capacitive means including electrode means comprised of a conductive material plated on the top surface of the dielectric means at a predetermined distance from the hole in the dielectric means; and shunt inductive means coupled between the electrode means and signal ground.
Claim 44
Dependent Claim
26 words
The bandstop filter according to claim 37, wherein the dielectric means is comprised of a block of a dielectric material having the shape of a cylinder.
Claim 45
Dependent Claim
26 words
The bandstop filter according to claim 37, wherein the dielectric means is comprised of a block of a dielectric material having the shape of a parallelepiped.
Claim 46
Dependent Claim
54 words
The bandstop filter according to claim 37, further including a signal source for generating an input signal with respect to signal ground, means for coupling the input signal to the electrode means on the top surface of the dielectric means, and means for coupling the plated portion of the dielectric means to signal ground.
Claim 47
Dependent Claim
58 words
The bandstop filter according to claim 37, wherein said shunt inductive means including strip electrode means comprised of a conductive material plated on the top surface of the dielectric means, one end of the strip electrode means being coupled to the input electrode means, and the other end of the strip electrode means being coupled to signal ground.
References Cited (Backward Citations)
US3505618A
Cited
US3413577A
Cited
US3713051A
Cited
US3691487A
Cited
US3798578A
Cited
US3728731A
Cited
US3811101A
Cited
US3973226A
Cited
US3938064A
Cited
US4264881A
Cited
US4136320A
Cited
US4101854A
Cited
US4179673A
Cited
US4223287A
Cited
US4276525A
Cited
US4255729A
Cited
US4268809A
Cited
US4283697A
Cited
US4228539A
Cited
US4292610A
Cited
US4287494A
Cited
US4386328A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-16 | 1987-07-18 | 1988-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-16 | 1991-07-18 | 1992-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-16 | 1995-07-18 | 1996-01-17 | $7700.00 | Window Closed / Lapsed |