Phased Array Feed Model Equations corresponding to two definitions of embedded beam pattern
arXiv:1902.01517
Abstract
In this report, we present the phased array feed (PAF) model equations for two definitions of embedded beam patterns. In Roshi \& Fisher (2016), we presented the PAF model by defining the embedded beam pattern as the beam pattern due to a 1 V excitation to one port and all other ports short circuited. This embedded beam pattern is referred to as voltage-embedded-beam (VEB). The embedded beam pattern can also be defined as the beam pattern due to a 1 A excitation to one port and all other ports open circuited. This definition is usually used in engineering literature and we refer to the pattern as current-embedded-beam (CEB). Here we derive the relationship between the two embedded beam patterns and present the corresponding model equations.
9 pages, 1 figures, National Radio Astronomy Observatory EDIR No 331 (https://library.nrao.edu/public/memos/edir/EDIR_331.pdf)