US3753162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microstrip ferrite phase shifters having time segments varying in length in accordance with preselected phase shift characteristic
Assignee: Individual
•
Filing: 1971-09-27
•
Granted: 1973-08-14
•
Expires: 1991-09-27
Abstract
Abstract An electronically controllable RF (radio frequency) phase shifter that can be designed to provide either true time delay characteristics or constant phase versus frequency characteristics. The non-reciprocal microstrip phase shifters of the invention utilize a ferrimagnetic substrate with a metallized strip conductor on one face and a metallized ground plane on the other face. The strip conductor has a plurality of adjacent line sections selected to provide a circularly polarized RF magnetic field at a point between each two adjacent conductors with the plane of the circularly polarized magnetic field being orthogonal to the plane of a DC magnetic bias field, the latter plane being provided parallel to the face of the substrate. The circularly polarized RF magnetic field is developed by selecting the line sections with a length so that the signals in adjacent lines are 90* out of phase from each other. When either the level or direction of the DC bias is changed, the permeability of the ferrimagnetic material changes causing a change in the propagation constant and a resultant phase shift change. To provide a relatively wide bandwidth to the phase shifter and a desired delay characteristic, the adjacent conductor sections have their line length varied so that different portions of the line effects the phase shift for different frequencies.
Inventors
- 👤 D Charlton
- 👤 W Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:37
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/18; H01P1/19
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
222 words
A wide bandwidth RF phase shifter responsive to applied control signals, for phase shifting applied RF signals and wherein the relative phase shift across the bandwidth is in accordance with a preselected function of the frequency of the RF signals, said device comprising: a ferrimagnetic substrate having first and second surfaces; a ground plane Conductor on the first surface of said substrate; a continuous conductor on the second surface of said substrate said conductor being a meander line having a plurality of equally spaced substantially parallel adjacent line segments with the length of the adjacent line segments varying logperiodically from one end to the other end of said meander line; whereby the phase delay applied to said RF signals is approximately a linear function of the frequency of said RF signals. means for applying said Rf input signals to a first end of said conductor; output means for receiving the RF signals from a second end of said conductor; and means for providing a DC magnetic bias field in said substrate in response to the applied control signals; whereby the value of phase delay applied to said RF signals is controllable in response to said control signals, and the relative phase shift across the bandwidth is in accordance with a predetermined function of frequency established by said preselected segment length distribution pattern.
Claim 2
Dependent Claim
222 words
A wide bandwidth RF phase shifter responsive to applied control signals, for phase shifting applied RF signals and wherein the relative phase shift across the bandwidth is in accordance with a preselected function of the frequency of the RF signals, said device comprising: a ferrimagnetic substrate having first and second surfaces; a ground plane Conductor on the first surface of said substrate; a continuous conductor on the second surface of said substrate said conductor being a meander line having a plurality of equally spaced substantially parallel adjacent line segments with the length of the adjacent line segments varying logperiodically from one end to the other end of said meander line; whereby the phase delay applied to said RF signals is approximately a linear function of the frequency of said RF signals. means for applying said Rf input signals to a first end of said conductor; output means for receiving the RF signals from a second end of said conductor; and means for providing a DC magnetic bias field in said substrate in response to the applied control signals; whereby the value of phase delay applied to said RF signals is controllable in response to said control signals, and the relative phase shift across the bandwidth is in accordance with a predetermined function of frequency established by said preselected segment length distribution pattern.
Claim 3
Dependent Claim
202 words
A wide bandwidth RF phase shifter responsive to applied control signals, for phase shifting applied RF signals and wherein the relative phase shift across the bandwidth is in accordance with a preselected function of the frequency of the RF signals, said device comprising: a ferrimagnetic substrate having first and second surfaces; a ground plane conductor on the first surface of said substrate; a continuous conductor on the second surface of said substrate said conductor being a meander line having a plurality of equally spaced substantially parallel adjacent line segments with the length of the adjacent line segments varying approximately linearly from one end to the other end of said meander line, means for applying said RF input signals to a first end of said conductor; output means for receiving the RF signals from a second end of said conductor; and means for providing a DC magnetic bias field in said substrate in response to the applied control signals; whereby the value of phase delay applied to said RF signals is controllable in response to said control signals, and the relative phase shift across the bandwidth is in accordance with a predetermined function of frequency established by said preselected segment length distribution pattern.
Claim 4
Dependent Claim
202 words
A wide bandwidth RF phase shifter responsive to applied control signals, for phase shifting applied RF signals and wherein the relative phase shift across the bandwidth is in accordance with a preselected function of the frequency of the RF signals, said device comprising: a ferrimagnetic substrate having first and second surfaces; a ground plane conductor on the first surface of said substrate; a continuous conductor on the second surface of said substrate said conductor being a meander line having a plurality of equally spaced substantially parallel adjacent line segments with the length of the adjacent line segments varying approximately linearly from one end to the other end of said meander line, means for applying said RF input signals to a first end of said conductor; output means for receiving the RF signals from a second end of said conductor; and means for providing a DC magnetic bias field in said substrate in response to the applied control signals; whereby the value of phase delay applied to said RF signals is controllable in response to said control signals, and the relative phase shift across the bandwidth is in accordance with a predetermined function of frequency established by said preselected segment length distribution pattern.
Claim 5
Dependent Claim
234 words
A wide bandwidth RF phase shifter responsive to applied control signals, for phase shifting applied RF signals and wherein the relative phase shift across the bandwidth is in accordance with a preselected function of the frequency of the RF signals, said device comprising: a ferrimagnetic substrate having first and second surfaces; a ground plane conductor on the first surface of said substrate; a continuous conductor on the second surface of said substrate said conductor having a generally spiral-shaped configuration from one end to the other end thereof with each turn of said spiral forming a conductor section and with adjacent conductor sections varying in length from a first end to a second end of said spiral in accordance with a log-periodic distribution pattern; whereby the phase delay applied to said RF signals is approximately a linear function of the frequency of said signals; means for applying said RF input signals to a first end of said conductor; output means for receiving the RF signals from a second end of said conductor; and means for providing a DC magnetic bias field in said substrate in response to the applied control signals; whereby the value of phase delay applied to said RF signals is controllable in response to said control signals, and the relative phase shift across the bandwidth is in accordance with a predetermined function of frequency established by said preselected segment length distribution pattern.
Claim 6
Dependent Claim
234 words
A wide bandwidth RF phase shifter responsive to applied control signals, for phase shifting applied RF signals and wherein the relative phase shift across the bandwidth is in accordance with a preselected function of the frequency of the RF signals, said device comprising: a ferrimagnetic substrate having first and second surfaces; a ground plane conductor on the first surface of said substrate; a continuous conductor on the second surface of said substrate said conductor having a generally spiral-shaped configuration from one end to the other end thereof with each turn of said spiral forming a conductor section and with adjacent conductor sections varying in length from a first end to a second end of said spiral in accordance with a log-periodic distribution pattern; whereby the phase delay applied to said RF signals is approximately a linear function of the frequency of said signals; means for applying said RF input signals to a first end of said conductor; output means for receiving the RF signals from a second end of said conductor; and means for providing a DC magnetic bias field in said substrate in response to the applied control signals; whereby the value of phase delay applied to said RF signals is controllable in response to said control signals, and the relative phase shift across the bandwidth is in accordance with a predetermined function of frequency established by said preselected segment length distribution pattern.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |