Medium Power S-Band Rotary Field Ferrite Phase Shifters

Virtual Prototyping and Development of Rotary Field Ferrite Phase Shifter

“…The dimension of the simulator can be calculated from the relation : A = λ / (2 sin θ) where A is the edge of square waveguide, θ is the scan angle and λ is the free space wavelength at the center frequency of the band 7 . The simulator dimensions are matched to those of WR-159 standard waveguide for C-band, so that the regular test bench can be used for S-parameter measurements 8,9 . Design and simulation of the 8-pole ferrite yoke is carried out on Ansoft's 3-D Maxwell field solver software.…”

Propagation in a Ferrite Circular Waveguide Magnetized Through a Rotary Four-Pole Magnetic Field

“…Boyd [3] pointed out that periodical guide in which sections of high permittivity dielectric material alternate with ferrite sections, produces differential phase shift even when ferrite sections are below cutoff frequency. It allowed [4,5] to reduce diameter of circular waveguide used to build practical ferrite rotary-field phase shifters .…”

“…Although using ferrite transmission line model [1] and basing on the experimental experiences Boyd et al reviewed the principle of operation [2,3] and design relationship and construction of these devices [4,5], a satisfactory physical model describing clearly their operation properties has not been achieved yet. The purpose of this paper is an alternative approach using the coupled mode method [6] to the explanation of the operation principles of such ferrite structures.…”

“…It extends the coupled mode approach formulated in [7] where such problem was treated for saturated magnetized ferrite only. Our attention is focused on the novel configuration reported in [3][4][5] where the rotation of biased magnetic field pattern is controlled electronically. The bias yoke consists of two sets of coils, each generating four-pole magnetic field.…”