The Effect of Mutual Coupling on the Side Lobe Performance of Chebyshev Arrays. Volume 1
Abstract
This computer analysis assessed the impact of mutual coupling on the side lobe performance of Chebyshev linear arrays as a function array size, scan condition, and the severity of Chebyshev taper. Array elements were horizontal parallel dipoles over a ground plane. Three simple compensation schemes to account for coupling were investigated. A fortran computer program, based upon King-Middleton's modified, zero-order, two-term theory for cylindrical dipoles, was written to calculate the generalized impedance matrix for the linear array, dipole current distributions and the far-field H-plane pattern in the presence of coupling. It is sufficiently general to allow the user of specify, number of dipoles, dipole length and radius, dipole spacing, height above ground plane, frequency, and complex generator voltages driving the array. The results relate side lobe degradation (growth) to array size, scan condition, and desired Chebyshev side lobe level. Additional programs were written to reverse the matrix solution, and solve for generator voltages, which after coupling, produce a base current distribution with a Chebyshev taper. Three simpler compensation schemes then used approximations of the compensated (complex) voltages to drive the array. Theses
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1989
- Accession Number
- ADA205724
Entities
People
- Robert A. Gierard
Organizations
- Air Force Institute of Technology