SURFACE WAVE BEHAVIOR IN PHASED ARRAYS
Abstract
Mutual coupling in phased arrays causes their active impedance to vary with the electrical phasing used to scan the array. Large impedance mismatches can accrue if many coupling contributions add in-phase. This happens when the steering phase advance equals the mutual coupling phase delay between consecutive elements. For these critical scan directions, reflections can be very large and the antenna array will transmit or receive very little power as evidenced by deep holes in the element radiation pattern. Element radiation pattern and active array mismatch are shown to be equivalent representations of phased array scanning performance. A large, flat, uniformly spaced, array of identical elements is analyzed. A relation is found between the critical scan angle and mutual coupling coefficients. Radiation pattern and coupling phase measurements in an array are presented in support of the analysis.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 28, 1965
- Accession Number
- AD0624308
Entities
Organizations
- Sylvania Electric Products