Rectangular Waveguide Differential Phase Shifter Based on Horizontal Ferrite Tiles: Accurate Model for Full-Band Operation

Abstract

Phase shifters are one of the most important elements deployed in the antenna feeding structures. They are being used in several antenna systems for various applications. Moreover, they can be used in different microwave devices such as circulators and isolators. Furthermore, they are one of the commonly used components in circularly polarized antenna systems. They can be deployed using different techniques depending on the required electrical specifications and the power handling capability. Phase shifters with horizontal ferrite tiles have a higher power handling capability than the transistor based. Thus, this type of phase shifter was frequently visited in the literature. However, the previously presented models were either inaccurate or had a narrow validity range. Here, mathematical analysis and study have been performed for non-reciprocal differential phase shifters using two horizontal ferrite tiles based on waveguide technology. A new model is proposed along with the transcendental equation for the phase constant. The presented model is validated through comparison with various standard waveguides over the full band operation. Moreover, an experimental validation step is carried out, where the measured results have acceptable values. INDEX TERMS Non-reciprocal components, ferrite, waveguide differential phase shifter, horizontal ferrite slabs, full-band phase shifter.

Magnetically Tunable Wideband Ferrite-Based Metamaterial Phase Shifter

“…[9][10][11] Owing to the negative effective permeability of ferrite materials at microwave frequencies and their dependence on the applied magnetic field, making these media the main materials to realize tunability. [12][13][14] Though many studies have been carried out for tunable or wideband phase shifters, the wideband phase shifters are not tunable, while operating band of most tunable phase shifters are particularly narrow. Furthermore, most designs are complex and not easy to be integrated into the systems.…”

Parametric Design of a Class of Full-Band Waveguide Differential Phase Shifters

“…Achievement of the desired phase difference in a waveguide is generally obtained through variation of the waveguide propagation constant in the shift line. One way to do this is to modify the dielectric constant with the introduction of dielectric slabs [4] or ferrite materials [5,6]. These structures can be easily designed to get any arbitrary phase shift, but their insertion loss is increased with the dielectric constant accordingly.…”