Movable optical fiber system for directing microwaves
US4954834A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 5, 1988 |
| Grant date | Sep 4, 1990 |
| Priority date | — |
| Expiry date | Jul 5, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q3/267
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A movable optical fiber system for directing test and calibration signals to the individual transmit-receive modules of a phased array antenna is provided with a laser device for generating optic signals. The laser device also includes a circuit for amplitude modulating the optic signals prior to their exiting the laser device. A fixed length of fiber-optic cable is connected with the laser device for directing the generated optic signals to a photodiode secured for movement to a motion device positioned adjacent the antenna face. The photodiode converts the optic signals to equivalent microwave signals, and the microwave signals are thereafter passed through a waveguide connected with the photodiode. Both the photodiode and waveguide are moved in a preselected linear path across the antenna face by the motion device; and, as the motion device operates to move the photodiode and waveguide, microwave test and calibration signals are discharged from the waveguide to be received by the individual transmit-receive modules in succession.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.