Back to results
US 6,661,377 B2Granted
Phased array antenna using gain switched multimode fabry-perot laser diode and high-dispersion-fiber
AssigneeKwangju Institute of Science and Technology
InventorsYong-Tak Lee, Jung Hye Chae
Life of this patent
Estimating the term…
Abstract
The present invention is about phased array antenna using gain switched multimode Fabry-Perot laser diode (FP-LD) and high-dispersion fiber. More particularly, the invention deals with techniques that allow compact and low-cost system implementation for phased array antenna adopting optical control and also allows continuous time delay for each antenna in the array to induce phase difference.
Claims5
A phased array antenna comprising;
- a multimode Fabry-Perot laser diode that generates optical pulses by gain switching,
- a high-dispersion fiber which carries said optical pulses and which generates a microwave signal by separating each mode of said multimode Fabry-Perot laser diode,
- a power splitter that distributes said mode-separated optical pulse train into a number of antennas in the array to send the pulse signal to the antenna array,
- a time delay line which causes a phase difference for different time delays respectively by passing said distributed optical pulses through different lengths of non-dispersive fiber respectively,
- a photodetector which photo-electrically converts said optical pulses having the phase difference,
- an amplifier that amplifies said photo-electrically converted pulses, and
- an antenna array that transmits said amplified pulses.
4 more elements
Dependencies are inferred from the claim text.