Butler Matrix 4x4 Ultra High Frequency

Abstract

A Butler matrix scheme with the possibility of forming four independent radiation patterns is proposed. The dimensions of the circuit under consideration were reduced due to the miniaturization of all directional couplers included in the matrix. The dimensions of the couplers were reduced using artificial transmission lines - this allowed to reduce the matrix area by 73.15% relative to the matrix in the standard version. Theoretical and experimental characteristics are given, according to which it was established that the operating frequency band of the compact matrix is already 10%. The proposed matrix can be easily manufactured using standard methods for the manufacture of printed circuit boards.