Dielectric loaded adjustable phase shifting apparatus
US4788515A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1988 |
| Grant date | Nov 29, 1988 |
| Priority date | — |
| Expiry date | Feb 19, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/183
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An adjustable phase-shifting apparatus for use in shifting the phase of a microwave signal transmitted along a TEM transmission line, such as coaxial line whose inner and outer conductors have square cross-sections. The apparatus includes a body with an elongated cavity therein which forms part of the outer conductor, and a cover attached to the body which forms at least part of the outer conductor. The cover has at least one pair of elongated openings that provide access to a portion of the cavity. The apparatus also includes a movable member provided with at least one pair of elongated, tapered, dielectric-loaded projections that slidably pass through the elongated openings and are positionable about either side of the center conductor to provide an adjustable phase lag. A digital or analog actuator, such as a solenoid or motor driven cam, is provided to slide the projections in and out of the cavity in a direction normal to the signal's direction through the cavity to enable adjustment of the phase lag or shift. Multiple pairs of openings in the cover and corresponding pairs of dielectric projections may be used along a common extended cavity in the body to provide a series of s…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.