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IEEE Transactions on Antennas and Propagation
Volume 47 Number 3, March 1999

Table of Contents for this issue

Complete paper in PDF format

Anomalous Edge Effects in Finite Arrays

R. C. Hansen, Life Fellow, IEEE

Page 549.

Abstract:

The regular oscillations in scan impedance (normalized by the infinite array values) that occur across a finite array are uniquely altered in two special cases based on computer simulations of finite-by-infinite arrays. First, dipoles with groundplane at broadside in the E-plane, exhibit a slow modulation of the usual oscillations; the period of the modulation varies with dipole radius. For all other cases, the results are insensitive to radius. Second, for a dipole array and lattice spacing and H-plane scan angle that allow a grating lobe to appear at -90° the oscillations disappear, except at the rear edge. These phenomena give some indications of the behavior of the pseudotraveling waves in scan impedance.

References

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