US3886502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Broad band field displacement isolator
Assignee: RYT IND
•
Filing: 1974-08-06
•
Granted: 1975-05-27
•
Expires: 1994-08-06
Abstract
Abstract A broad band field displacement isolator of the strip-line type. The isolator includes a conductive planar circuit which has three outwardly narrowing legs extending from a common portion with a first and a second of the legs being an input and output port respectively and the third leg being provided with a load. The circuit is symmetrical with respect to an axis extending through the third leg with at least the circuit extending between the joining the first and second legs with the third leg each constituting a series of stepped quarter wavelength linear tapered impedance transformers. Bodies of gyromagnetic material are symmetrically disposed on opposite sides of the circuit overlying substantially the entire portion of the circuit extending between the input and the output ports and layers of dielectric load material are disposed on opposite sides of the circuit overlying the third leg and coplanar with the bodies of gyromagnetic material.
Inventors
- 👤 Herbert P Radding
- 👤 George E Tralle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:45
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/32; H01P1/36; H01P1/362
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
207 words
A broad band microwave strip-line field displacement isolator comprising: a conductive planar circuit having three outwardly narrowing legs extending from a common portion with a first and a second of said legs being an input port and an output port respectively, said circuit being symmetrical with respect to an axis extending through said third leg and at least the edge of said circuit extending between and joining said first and said third legs and the edge of said circuit extending between and joining said second and said third legs constituting a series of stepped lambda /4 linear tapered impedance transformers; first and second bodies of gyromagnetic material symmetrically disposed on opposite sides of said conductive circuit and overlying substantially the entire portion of said circuit extending between said input and output ports; first and second layers of a dielectric load material disposed on opposiTe sides of said circuit overlying said third leg and coplanar with said first and second bodies of gyromagnetic material respectively; first and second spaced parallel ground planes overlying said first and second bodies of gyromagnetic material and said first and second layers of load material respectively; and magnetic field generating means adjacent said first and second layers of gyromagnetic material for biasing same.
Claim 2
Dependent Claim
207 words
A broad band microwave strip-line field displacement isolator comprising: a conductive planar circuit having three outwardly narrowing legs extending from a common portion with a first and a second of said legs being an input port and an output port respectively, said circuit being symmetrical with respect to an axis extending through said third leg and at least the edge of said circuit extending between and joining said first and said third legs and the edge of said circuit extending between and joining said second and said third legs constituting a series of stepped lambda /4 linear tapered impedance transformers; first and second bodies of gyromagnetic material symmetrically disposed on opposite sides of said conductive circuit and overlying substantially the entire portion of said circuit extending between said input and output ports; first and second layers of a dielectric load material disposed on opposiTe sides of said circuit overlying said third leg and coplanar with said first and second bodies of gyromagnetic material respectively; first and second spaced parallel ground planes overlying said first and second bodies of gyromagnetic material and said first and second layers of load material respectively; and magnetic field generating means adjacent said first and second layers of gyromagnetic material for biasing same.
Claim 3
Dependent Claim
46 words
A field displacement isolator as defined in claim 1 wherein the length of said transformers on each of said edges is equal to lambda /4 at a frequency of approximately 1.2-2.4 times the frequency of the low end of the operating band, in the gyromagnetic medium.
Claim 4
Dependent Claim
24 words
A field displacement isolator as defined in claim 2 wherein the minimum number of said transformers on each said edge is equal to 5.
Claim 5
Dependent Claim
36 words
A field displacement isolator as defined in claim 1 wherein the size of the steps between adjacent transformers of each said series increases in a direction from the input and output ports toward said third leg.
Claim 6
Dependent Claim
28 words
A field displacement isolator as defined in claim 1 wherein the edge of said circuit extending between and joining said first and second legs is a straight line.
Claim 7
Dependent Claim
36 words
A field displacement isolator as defined in claim 5 further comprising a layer of dielectric material with a high dielectric constant overlying at least a portion of said straight edge and coplanar with said gyromagnetic material.
Claim 8
Dependent Claim
61 words
A field displacement isolator as defined in claim 1 wherein the edge of said circuit extending between and joining said first and secon legs is constituted by a series of stepped linearly tapered impedance transformer which are symmetrically arranged with respect to the said series of stepped transformers in said edges joining said third leg with said first and second legs.
Claim 9
Dependent Claim
66 words
A field displacement isolator as defined in claim 1 wherein each of said first and second layers of load material is divided into two portions, each of said portions being positioned relative to the adjacent edge of the respective layer of gyromagnetic material to maximize the quantity of energy transferred to said load material over a broad band, and thus provided a more optimum isolation response.
References Cited (Backward Citations)
US3359510A
Cited
US3617951A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |