Patent US3736536A successfully refreshed from Google Patents.
US3736536A
Expired / Lapsed
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Microwave filter
Assignee: Bendix Corp
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Filing: 1971-04-14
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Granted: 1973-05-29
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Expires: 1991-04-14
Abstract
Abstract The inventive microwave filter is based upon the utilization of a prototype filter of known type, and a recognition of the properties of microwave C-sections, and parallel coupled line capacitance arrays. A prior art filter is chosen as a prototype filter and is partitioned into a general equivalent circuit derived by applying electrical constraints to the standard equivalent circuits for microwave C-sections and parallel coupled line capacitance arrays. A set of general equations is then written for the equivalent circuit, and by using the equations it is possible to design filters having a wide range of desired filter characteristics simply by substituting the values from the prototype filter into the equations. It is therefore possible to construct a wide variety of filters from a few standard parts. Strip line filters can also be made utilizing the general equations.
Inventors
- 👤 R Wenzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:20
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/201
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
51 words
A microwave filter comprising: a parallel line capacitance array the number of individual line sections within said parallel line capacitance array being defined as n; a microwave C-section array the number of microwave C-sections being defined as n-1 said parallel line capacitance array and said C-section array being connected in parallel.
Claim 2
Dependent Claim
51 words
A microwave filter comprising: a parallel line capacitance array the number of individual line sections within said parallel line capacitance array being defined as n; a microwave C-section array the number of microwave C-sections being defined as n-1 said parallel line capacitance array and said C-section array being connected in parallel.
Claim 3
Dependent Claim
34 words
The filter of claim 1 wherein the coupling capacitance of said microwave C-sections is substantially zero; and the capacitances with respect to ground of the individual elements composing each of said C-sections are equal.
Claim 4
Dependent Claim
79 words
A microwave filter comprising: a plurality of conductive elements having individual capacitance values dependent upon the individual dimensions of said conductive elements; a ground plane; dielectric means for maintaining said conductive elements in a spaced substantially parallel relationship and supporting said conductive elements above said ground plane so that said conductive elements form a parallel line capacitance array; a plurality of reactance means serially connecting one end of said conductive elements and extending substantially parallel to said ground plane.
Claim 5
Dependent Claim
79 words
A microwave filter comprising: a plurality of conductive elements having individual capacitance values dependent upon the individual dimensions of said conductive elements; a ground plane; dielectric means for maintaining said conductive elements in a spaced substantially parallel relationship and supporting said conductive elements above said ground plane so that said conductive elements form a parallel line capacitance array; a plurality of reactance means serially connecting one end of said conductive elements and extending substantially parallel to said ground plane.
Claim 6
Dependent Claim
26 words
The filter of claim 3 wherein said conductive elements are conductive three-dimensional elements having individual capacitance values dependent upon the individual dimensions of said conductive elements.
Claim 7
Dependent Claim
31 words
The filter of claim 5 wherein said reactance means are microwave C-sections and wherein said conductive elements and said microwave C-sections are substantially two dimensional members supported by said dielectric means.
Claim 8
Dependent Claim
22 words
The filter of claim 3 wherein said reactance means are conductive loops the ends of which are connected to adjacent conductive elements.
Claim 9
Dependent Claim
12 words
The filter of claim 3 wherein said reactance means are lumped inductances.
Claim 10
Dependent Claim
41 words
The filter of claim 6 wherein said reactance means are microwave C-sections and the coupling capacitance of said microwave C-sections is substantially zero; and the capacitances with respect to ground of the individual elements composing each of said C-sections are equal.
Claim 11
Dependent Claim
34 words
The filter of claim 5 wherein the coupling capacitance of said microwave C-sections is substantially zero; and the capacitances with respect to ground of the individual elements composing each of said C-sections are equal.
Claim 12
Dependent Claim
15 words
The filter of claim 5 wherein said filter is designed in accordance with the expressions:
Claim 13
Independent Claim
50 words
A method of making a microwave filter including the steps of: arranging a quantity of n line capacitances into a parallel line array; connecting a quantity of n-1 reactance means to said parallel line array so that said parallel line array and said quantity are in an electrical parallel relationship.
Claim 14
Independent Claim
50 words
A method of making a microwave filter including the steps of: arranging a quantity of n line capacitances into a parallel line array; connecting a quantity of n-1 reactance means to said parallel line array so that said parallel line array and said quantity are in an electrical parallel relationship.
Claim 15
Dependent Claim
54 words
The method of claim 11 further including the steps of: utilizing microwave C-sections as said reactance means and designing said microwave C-sections so that the coupling capacity of each of said microwave C-sections is zero; and selecting individual line capacitances for each of said C-sections so that line capacitances of each C-section are equal.
Claim 16
Dependent Claim
21 words
The method of claim 11 further including the step of: selecting the elements of said filter in accordance with the equations:
Claim 17
Dependent Claim
22 words
The method of claim 11 further including the steps of: utilizing lumped inductances in the form of coils as said reactance means.
Claim 18
Dependent Claim
22 words
The method of claim 12 further including the steps of: utilizing lumped inductances in the form of coils as said reactance means.
Claim 19
Dependent Claim
33 words
A microwave filter comprising: a parallel line capacitance array; a microwave C-section array connected in a parallel relationship with said parallel line capacitance array said filter being designed in accordance with the expressions:
Claim 20
Dependent Claim
33 words
A microwave filter comprising: a parallel line capacitance array; a microwave C-section array connected in a parallel relationship with said parallel line capacitance array said filter being designed in accordance with the expressions:
Claim 21
Dependent Claim
75 words
A microwave filter comprising: a plurality of conductive elements; a ground plane; dielectric means for maintaining said conductive elements in a spaced substantially parallel relationship and supporting said conductive elements above said ground plane so that said conductive elements form a parallel line capacitance array; a plurality of reactance means serially connecting one end of said conductive elements and extending substantially parallel to said ground plane, said filter being designed in accordance with the expressions:
Claim 22
Dependent Claim
75 words
A microwave filter comprising: a plurality of conductive elements; a ground plane; dielectric means for maintaining said conductive elements in a spaced substantially parallel relationship and supporting said conductive elements above said ground plane so that said conductive elements form a parallel line capacitance array; a plurality of reactance means serially connecting one end of said conductive elements and extending substantially parallel to said ground plane, said filter being designed in accordance with the expressions:
Claim 23
Dependent Claim
75 words
A microwave filter comprising: a plurality of conductive elements; a ground plane; dielectric means for maintaining said conductive elements in a spaced substantially parallel relationship and supporting said conductive elements above said ground plane so that said conductive elements form a parallel line capacitance array; a plurality of microwave C-sections serially connecting one end of said conductive elements and extending substantially parallel to said ground plane, said filter being designed in accordance with the expressions:
Claim 24
Dependent Claim
75 words
A microwave filter comprising: a plurality of conductive elements; a ground plane; dielectric means for maintaining said conductive elements in a spaced substantially parallel relationship and supporting said conductive elements above said ground plane so that said conductive elements form a parallel line capacitance array; a plurality of microwave C-sections serially connecting one end of said conductive elements and extending substantially parallel to said ground plane, said filter being designed in accordance with the expressions:
References Cited (Backward Citations)
US3265994A
Cited
US3408599A
Cited
US3581250A
Cited
US3546636A
Cited
US3593208A
Cited
US3644850A
Cited
US3617954A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |