US4799033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave separator
Assignee: Alps Alpine Co Ltd
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Filing: 1987-03-19
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Granted: 1989-01-17
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Expires: 2007-03-19
Abstract
Abstract A microwave separator for separating a microwave signal to those having frequencies included in two frequency bands by means of a first band pass filter intended for the low frequency band and a second filter intended for the high frequency band, characterized in that said first band pass filter is of the comb line type and that said second band pass filter is of the coaxial type in which plural coaxial type resonators are connected one another in series through capacitors. As the result, microwave signals can be reliably separated at two adjacent frequency bands without any signal loss and the return losses of the band pass filters can be improved accordingly.
Inventors
- 👤 Sadao Igarashi
- 👤 Moriaki Ueno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:14
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/201; H01P1/202; H01P1/213; H01P1/2136; H01P1/205; H01P1/2056
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
In a microwave separator of the type having a first band pass filter connected between a signal input terminal and one end of a first coaxial cable for filtering a lower frequency band of an input microwave signal, a second band pass filter connected between a signal output terminal and one end of a second coaxial cable for filtering a higher frequency band of the input microwave signal, wherein the other ends of the first and second coaxial cables are connected in parallel to a common signal input/output source, the improvement comprising said first band pass filter being of the comb type having a plurality of inner conductors formed in a line through a dielectric block; and said second band pass filter being of the coaxial type in which a plurality of coaxial type resonators are connected to one another in series through respective capacitances.
Claim 2
Dependent Claim
145 words
In a microwave separator of the type having a first band pass filter connected between a signal input terminal and one end of a first coaxial cable for filtering a lower frequency band of an input microwave signal, a second band pass filter connected between a signal output terminal and one end of a second coaxial cable for filtering a higher frequency band of the input microwave signal, wherein the other ends of the first and second coaxial cables are connected in parallel to a common signal input/output source, the improvement comprising said first band pass filter being of the comb type having a plurality of inner conductors formed in a line through a dielectric block; and said second band pass filter being of the coaxial type in which a plurality of coaxial type resonators are connected to one another in series through respective capacitances.
References Cited (Backward Citations)
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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) | 1992-01-17 | 1992-07-18 | 1993-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-17 | 1996-07-18 | 1997-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-17 | 2000-07-18 | 2001-01-17 | $7700.00 | Window Closed / Lapsed |