DocumentCode :
1426462
Title :
Ultra-Long Compact Optical Polymeric Array Waveguide True-Time-Delay Line Devices
Author :
Chen, Changming ; Yi, Yunji ; Wang, Fei ; Yan, Yunfei ; Sun, Xiaoqiang ; Zhang, Daming
Author_Institution :
State Key Lab. on Integrated Optoelectron., Jilin Univ., Changchun, China
Volume :
46
Issue :
5
fYear :
2010
fDate :
5/1/2010 12:00:00 AM
Firstpage :
754
Lastpage :
761
Abstract :
New types of UV curable polymeric ultra-long array waveguide true-time-delay (TTD) lines for wideband phased array antennas (PAA) are designed and fabricated using direct UV photolithography process. The unique feature of the approach consists of different 1 × N waveguide splitters, low-loss S-bend cosine waveguide connectors, and 180° array bend waveguides with a constant spacing difference ¿R between adjacent waveguides. The delay time increments are measured from 1.4 ns to 6.6 ps. 1 × 2, 1 × 4, 1 × 8 polymeric star coupler devices are also successfully prepared. The bend loss of different curved waveguides is calculated and analyzed by the 3-D semivectorial beam propagation method (BPM). The optimized structural properties of the UV curable polymeric waveguides and fabrication procedures are demonstrated. The near-infrared field guided-mode patterns of the devices are obtained. The new technique can be well suited for realizing absence of "beam squint" in the antenna pattern as its frequency is switched from L(1-2.6 GHz) to X(8-12 GHz) band.
Keywords :
antenna phased arrays; optical polymers; optical waveguides; photolithography; 3D semivectorial beam propagation method; UV curable polymeric ultra-long array waveguide true-time-delay lines; antenna pattern; array bend waveguides; beam squint; direct UV photolithography process; frequency 1 GHz to 2.6 GHz; frequency 8 GHz to 12 GHz; low-loss S-bend cosine waveguide connectors; polymeric star coupler devices; true-time-delay line devices; ultra-long compact optical polymeric array waveguide; waveguide splitters; wideband phased array antennas; Antenna arrays; Broadband antennas; Connectors; Lithography; Optical arrays; Optical devices; Optical polymers; Optical waveguides; Phased arrays; Ultra wideband antennas; Optical waveguide; UV curable polymer; star coupler devices; true-time-delay (TTD) lines; waveguide bends;
fLanguage :
English
Journal_Title :
Quantum Electronics, IEEE Journal of
Publisher :
ieee
ISSN :
0018-9197
Type :
jour
DOI :
10.1109/JQE.2009.2037830
Filename :
5420228
Link To Document :
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