Peter presented the attached slides the IVth(!) presentation about mutual coupling in radio antenna arrays. This version has a modified expression (version III, shown in a previous meeting) for the beam overlap matrix, B, and a corrected form for the S-matrix. The meaning of the beam overlap matrix is still unclear!
Reza has been thinking about mutual coupling as well and discussed his attached slides. He also uses the S-matrix but uses it to describe a more physical model of the radiation from antennas.
The date for the 21 cm Cosmology Workshop and Tianlai Collaboration Meeting seems to be settled now for the week of Dec 13-18, 2026.
The next discussion of the tNCCSz paper is Tuesday Nov 25.