The Role of Mutual Coupling in A 5:1 Bandwidth Stripline Notch Array
The bandwidth broadening effects of time-domain mutual coupling from adjacent elements in a linear array of stripline notch elements was briefly described in previous papers1, 2, 3. The array was designed at the Naval Research Laboratory (NRL) to demonstrate the feasibility of 5:1 bandwidth wide-scan angle arrays with one-half wavelength spacing at the highest operational frequency. This paper presents an expanded examination of the role of mutual coupling in pulse-excited linear and planar single polarization arrays as well as in a planar dual polarization array. When viewed in the time domain, inspection of mutual coupling leads to a physical understanding of the cause of the ultrawideband (UWB) behavior of the NRL arrays. The finite-difference time-domain (FDTD) method4,5 is employed to perform the studies, and measurements verify some of the calculations.
KeywordsRadar Flare Sine Active Element
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- 2.W. R. Pickles and M. Kragalott, Ultra-broadband Phased Array Antenna, Proceedings of the 1999 Antenna Applications Symposium, pp. 310–330 (1999).Google Scholar
- 3.M. Kragalott, W. R. Pickles, and M. S. Kluskens, A 5:1 Bandwidth Stripline Notch Array Design, Record of the 45 th Annual Tri-Service Radar Symposium 2, pp. 165–171 (1999).Google Scholar
- 5.R. J. Luebbers, Users Manual for XFDTD, REMCOM, Inc. (1994)Google Scholar
- 6.T. H. Chio, D. H. Schaubert, and H. Holter, Experimental Radiation and Mutual Coupling Characteristics of Dual-Polarized Tapered Slot Antenna (TSA) Arrays, Proceedings of the 1999 Antenna Applications Symposium, pp. 280–309 (1999).Google Scholar