DocumentCode :
1852042
Title :
A wave-based model for mutual coupling and truncation in finite tapered-slot phased arrays
Author :
Boryssenko, A.O. ; Schaubert, D.H. ; Craeye, Christophe
Author_Institution :
Massachusetts Univ., Amherst, MA, USA
Volume :
4
fYear :
2003
fDate :
22-27 June 2003
Firstpage :
11
Abstract :
The tapered-slot (Vivaldi) endfire element is a promising candidate for broadband phased arrays. These arrays often are designed by using estimates from infinite arrays and ignoring edge effects arising from truncation of the infinite periodic array. However, the strong mutual coupling that contributes to wide bandwidth performance often leads to severe truncation effects within the finite Vivaldi array. This study presents a time-domain approach to coupling and truncation phenomena with the help of; (1) full-wave numerical simulation and (2) wave-based physical modeling. First, the full-wave solution provides the terminal currents for all elements in the finite array. Next, the coupling and truncation effects are modeled by waves propagating across the aperture. Time gating of the computed terminal currents enables decomposition of the wave events. The dispersion characteristics of the waves propagating across the aperture can be quantified and edge reflection coefficients can be estimated. This process provides physical insight to better understand the behavior of finite Vivaldi arrays.
Keywords :
antenna phased arrays; antenna theory; broadband antennas; coupled circuits; electromagnetic wave propagation; electromagnetic wave reflection; integral equations; slot antenna arrays; aperture propagating waves; broadband phased arrays; edge effects; edge reflection coefficients; element terminal currents; finite Vivaldi arrays; finite array truncation modeling; finite tapered-slot phased arrays; full-wave numerical simulation; tapered-slot endfire element; time-domain integral equation solver; wave-based mutual coupling model; wave-based physical modeling; Antenna arrays; Bandwidth; Grid computing; Mutual coupling; Phase estimation; Phased arrays; Physics computing; Propagation constant; Reflection; Solid modeling;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Antennas and Propagation Society International Symposium, 2003. IEEE
Conference_Location :
Columbus, OH, USA
Print_ISBN :
0-7803-7846-6
Type :
conf
DOI :
10.1109/APS.2003.1220108
Filename :
1220108
Link To Document :
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