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US4527136A
Expired / Lapsed
US
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Signal coupling apparatus
Assignee: DX Antenna Co Ltd
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Filing: 1984-02-06
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Granted: 1985-07-02
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Expires: 2004-02-06
Abstract
Abstract A transmission line device for coupling two radio waves, such as horizontal and vertical polarized waves such as satellite transmissions, which are traveling in a particular direction along a pair of main transmission lines, selectively to a branch line without problem of mismatch, wherein the branch line is composed of a single feeder and selection of the two waves is effected simply by applying a positive or negative voltage to the feeder.
Inventors
- 👤 Kimitaka Kamiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:44
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/16; H01; H01P; H01P1/00; H01P1/10; H01P1/15; H04; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/18
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
183 words
Signal coupling apparatus for selectively coupling either of two signals transmitted along first and second main transmission lines, respectively, to a single branch line; comprising first and second directional couplers adapted for insertion in said first and second main transmission lines, respectively, with each being provided with a branch terminal; an output terminal adapted for connection to said branch line; a first diode coupled between said branch terminal of said first coupler and said output terminal; a second diode coupled between said branch terminal of said second coupler and said output terminal; said first and second diodes having first and second polarities, respectively, with respect to said output terminal; a first series connection of a third diode and a first dummy resistor coupled between the branch terminal of said first coupler and a reference potential point; a second series connection of a fourth diode and a second dummy resistor coupled between the branch terminal of said second coupler and said reference potential point; and said third and fourth diodes having said second and first polarities, respectively, with respect to said reference potential point.
Claim 2
Dependent Claim
183 words
Signal coupling apparatus for selectively coupling either of two signals transmitted along first and second main transmission lines, respectively, to a single branch line; comprising first and second directional couplers adapted for insertion in said first and second main transmission lines, respectively, with each being provided with a branch terminal; an output terminal adapted for connection to said branch line; a first diode coupled between said branch terminal of said first coupler and said output terminal; a second diode coupled between said branch terminal of said second coupler and said output terminal; said first and second diodes having first and second polarities, respectively, with respect to said output terminal; a first series connection of a third diode and a first dummy resistor coupled between the branch terminal of said first coupler and a reference potential point; a second series connection of a fourth diode and a second dummy resistor coupled between the branch terminal of said second coupler and said reference potential point; and said third and fourth diodes having said second and first polarities, respectively, with respect to said reference potential point.
Claim 3
Dependent Claim
26 words
Apparatus, in accordance with claim 1, further comprising means for applying a DC voltage of a selected polarity to said output terminal through said branch line.
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) | 1988-07-01 | 1988-12-31 | 1989-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-01 | 1992-12-31 | 1993-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-01 | 1996-12-31 | 1997-07-02 | $7700.00 | Window Closed / Lapsed |