US3600707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compensated flat directional coupler
Assignee: Skyworks Solutions Inc
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Filing: 1969-06-09
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Granted: 1971-08-17
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Expires: 1989-06-09
Abstract
Abstract A compensated flat directional coupler includes a main branch carrying an electrical signal and a coupled branch carrying a coupled electrical signal responsive to the signal on the main branch. The coupled branch includes an auxiliary compensating network in the output portion of the coupled branch. The auxiliary compensating network couples to the coupled branch and is substantially isolated from the main branch. The auxiliary compensating network is substantially independent of the coupling between the main and coupled branch. The auxiliary coupling network renders the ratio of coupled output signal to the main branch output signal substantially independent of input signal frequency variation.
Inventors
- 👤 David S Friedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:44
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/12; H01P5/16; H01P5/18
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
180 words
A coupled line compensating network for use with a TEM mode first transmission line coupler operative over a frequency range embracing a predetermined center frequency, said first coupler including means defining input, main output and coupler output ports and means defining main and coupled branches, said main branch being arranged for carrying an electrical signal, said coupled branch being arranged for carrying a coupled signal in response to the signal carried by said main branch, said coupled line compensating network including means defining a series conductor having two ends for connection by one of said ends to said coupler output port for carrying said coupled signal to said other end, means defining at least one auxiliary branch coacting with said series branch for establishing a coupling coefficient therebetween k2 and substantially isolated from said main branch for rendering the ratio of said coupled signal to said signal on said main branch substantially insensitive to frequency variation, said coefficient k2 being defined by the following equation: k22 (1/1+sin theta e) wherein theta e defines the band edge of said frequency range.
Claim 2
Dependent Claim
180 words
A coupled line compensating network for use with a TEM mode first transmission line coupler operative over a frequency range embracing a predetermined center frequency, said first coupler including means defining input, main output and coupler output ports and means defining main and coupled branches, said main branch being arranged for carrying an electrical signal, said coupled branch being arranged for carrying a coupled signal in response to the signal carried by said main branch, said coupled line compensating network including means defining a series conductor having two ends for connection by one of said ends to said coupler output port for carrying said coupled signal to said other end, means defining at least one auxiliary branch coacting with said series branch for establishing a coupling coefficient therebetween k2 and substantially isolated from said main branch for rendering the ratio of said coupled signal to said signal on said main branch substantially insensitive to frequency variation, said coefficient k2 being defined by the following equation: k22 (1/1+sin theta e) wherein theta e defines the band edge of said frequency range.
Claim 3
Dependent Claim
64 words
A compensating network according to claim 1 and further comprising, said first coupler, and means connecting said first coupler to said series branch to provide a compensatEd flat directional coupler, said first coupler comprising coupled lines characterized by a coupling coefficient k1 defined by: wherein K is the midband coupling of a compensated flat directional coupler comprising said first coupler and said compensating network
Claim 4
Dependent Claim
43 words
A compensated flat directional coupler according to claim 2 including at least two of said auxiliary branches coacting with said series branch each for a length corresponding substantially to an odd multiple of quarter wavelengths at said center frequency of said first coupler.
Claim 5
Dependent Claim
37 words
A compensated flat directional coupler according to claim 3 comprising two of said auxiliary branches coacting with said series branch and coupled thereto each for a length corresponding substantially to one quarter wavelength at said center frequency.
Claim 6
Dependent Claim
21 words
A compensated flat directional coupler according to claim 4 wherein said first coupler comprises a single section coupled transmission line coupler.
Claim 7
Dependent Claim
42 words
A compensated flat directional coupler according to claim 2 wherein said first coupler includes means defining a multiple section transmission line coupler and at least two of said auxiliary branches coact with said series branch to define multiple section transmission line couplers.
Claim 8
Dependent Claim
37 words
A compensated flat directional coupler according to claim 3 wherein said first coupler comprises a single section coupled transmission line coupler and said auxiliary branches coact with said series branch to define multiple section transmission line couplers.
Claim 9
Dependent Claim
30 words
A compensated flat directional according to claim 3 wherein the coupling coefficient achieved by each of said auxiliary branches coacting with said series branch are substantially equal to one another.
Claim 10
Dependent Claim
43 words
A compensated flat directional coupler according to claim 3 comprising an even number of said auxiliary branches coacting with said series branch each for a length corresponding substantially to an odd multiple of quarter wavelengths at said center frequency of said first coupler.
References Cited (Backward Citations)
US3048798A
Cited
US3297967A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |