DocumentCode :
1083550
Title :
Linear array of woodpile EBG sectoral horn antennas
Author :
Weily, Andrew R. ; Esselle, Karu P. ; Bird, Trevor S. ; Sanders, Barry C.
Author_Institution :
Dept. of Electron., Macquarie Univ., Sydney, NSW
Volume :
54
Issue :
8
fYear :
2006
Firstpage :
2263
Lastpage :
2274
Abstract :
A technique is described for creating linear array antennas that conform to the natural stacking sequence of the woodpile electromagnetic bandgap (EBG) material. Each element in the linear array consists of a woodpile EBG sectoral horn antenna. The electromagnetic confinement mechanism within each horn antenna relies wholly on the 3-D EBG of the woodpile material. The array element has a typical sectoral horn pattern with a directional beam in one principal plane and a broader beam in the other. The bandwidth of the sectoral horn is almost equal to that of the defect EBG waveguide. Measured and theoretical results for radiation patterns, impedance bandwidth and gain of a sectoral horn antenna made from alumina are described, and theoretical results for a design made from silicon are presented. It is shown that the layer-by-layer nature of the woodpile EBG material enables sectoral horn antennas to be easily stacked together in the E-plane to create linear arrays. Analysis of the mutual coupling as a function of element separation and its effect on reflection coefficient are presented for a two-element linear array in silicon. Theoretical analyses for fixed and scanned beam linear arrays of silicon woodpile EBG sectoral horns are described and finite-difference time-domain results are compared with array theory. The fixed beam arrays are designed for high directivity while the scanned beam array enables wide angle beam steering through the use of parasitic array elements
Keywords :
antenna radiation patterns; beam steering; finite difference time-domain analysis; horn antennas; linear antenna arrays; photonic band gap; waveguides; 3D EBG; angle beam steering; array theory; defect EBG waveguide; directional beam; electromagnetic confinement mechanism; element separation; finite-difference time-domain analysis; fixed beam arrays; impedance bandwidth; linear array antennas; natural stacking sequence; parasitic array elements; radiation patterns; reflection coefficient; scanned beam linear arrays; sectoral horn pattern; silicon woodpile EBG sectoral horns; two-element linear array; woodpile EBG sectoral horn antennas; woodpile electromagnetic bandgap material; Antenna measurements; Bandwidth; Electromagnetic waveguides; Horn antennas; Impedance measurement; Linear antenna arrays; Metamaterials; Periodic structures; Silicon; Stacking; Array antenna; electromagnetic bandgap (EBG) antenna; electromagnetic bandgap (EBG) material; electromagnetic bandgap (EBG) waveguide; finite-difference time-domain (FDTD); horn antenna; terahertz; three-dimensional (3-D) photonic crystal;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.2006.879181
Filename :
1668300
Link To Document :
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