Loading…
Delay-time-enhanced photonic crystal fiber array for wireless communications using two-dimensional X-band phased-array antennas
Continuously tunable optical true time-delay (TTD) modules based on dispersion-enhanced photonic crystal fibers (DEPCFs) are demonstrated to provide continuous microwave squint-free beam scanning for an X-band phased-array antenna (PAA) system. The dispersion of the fabricated photonic crystal fiber...
Saved in:
Published in: | Optical Engineering 2005-12, Vol.44 (12), p.125001-125008 |
---|---|
Main Authors: | , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Summary: | Continuously tunable optical true time-delay (TTD) modules based on dispersion-enhanced photonic crystal fibers (DEPCFs) are demonstrated to provide continuous microwave squint-free beam scanning for an X-band
phased-array antenna (PAA) system. The dispersion of the fabricated photonic crystal fibers (PCFs) is as high as
at
. By employing PCFs to increase the dispersion, the TTD module size can be proportionally reduced. The time delay is continuously tunable from
between adjacent delay lines by tuning the laser wavelength continuously from
. The far-field radiation patterns of a
subarray were measured from
scanning angles. Squint-free operation is experimentally confirmed. Wavelength conversion is also demonstrated to confirm that time-delay information can be successfully transferred from one wavelength to the other without being changed, which is suitable to be implemented in 2-D phased-array antenna systems. The TTD formation idea presented is suitable for not only the X band, but also the other higher microwave frequencies, such as the K band. |
---|---|
ISSN: | 0091-3286 1560-2303 |
DOI: | 10.1117/1.2149327 |