90 degre phase shifter based on a square waveguide with diaphragms

Abstract

Modern antenna systems with polarization signal processing are used to improve the information parameters of the signals processed in them [1, 2]. The basic elements of such systems are waveguide filters [3], phase shifters [4] and polarizers [5, 6]. Phase shifters provide the required phase values at the output. Polarizers provide a differential phase shift at the output of 90º [7]. The most common structures of waveguide polarizers are structures with diaphragms [8, 9], pins [10, 11], combined with pins and diaphragms [12, 13], and coaxial structures [14, 15] and ribbed structures [16, 17]. Differential phase shifter is used in the development of phased array antennas, in the formation of the beam in modern antenna systems and for power supply systems of modern antennas [18]. Modern 90º phase shifters [19, 20] have advanced functionality, simple compact geometric shape, resistant to amplitude imbalance, the ability to maintain a stable phase with multibeam propagation. In addition, such devices are sometimes used in 5G systems [21].