Basic Properties of Microstrip Circuit Elements on Nonreciprocal Substrate-Superstrate Structures

A Coupled-Mode Theory-Based Analysis of Coupled Microstrip Lines on a Ferrite Substrate

“…3, where the height of the substrate, the width of the microstrip lines, the relative permittivity, internal dc magnetic field, and saturation magnetization of the ferrite are h 1 = 0.254 mm, w 1 = w 2 = 0.254 mm ε r = 12.6, µ 0 H i = 0.0275 T and µ 0 M i = 0.275 T respectively. It is noted that these examples of parameters are chosen as those in [2]. Figure 4 shows the frequency dependence of the normalized propagation constants β/k 0 of the two coupled-modes for the forward wave and the backward wave when the separation distance between the microstrip lines is d = 0.5 mm.…”

“…The use of coupled microstrip lines, especially, on substrates of magnetized ferrites has come to attract great attention because of magnetized ferrite's wide range of applications to nonreciprocal integrated devices. However, since magnetized ferrite exhibits a biaxial anisotropy in permeability, it is often extremely difficult to analyze the electromagnetic fields which propagate in it, hence there are few theoretical studies [1][2][3][4] of coupled microstrip lines on anisotropic substrates.…”

Effect of Progressive Phase Excitation on Tunability of Rectangular Patch Array Antenna Printed on Synthesized LiTiZn Ferrite

“…Pozar and Sanchez [10] have studied experimentally the tuning of a microstrip antenna on ferrite substrate by varying its relative position with respect to small magnet. Yang and his colleagues [11][12] have studied the infinite phased array problem of dipole and patch antennas on ferrite substrate and they have shown some of the effects of the bias field strength and orientation. Batchelor and Langley [13] describe the beam scanning properties of a 2-element patch array fed by a microstrip feed situated on a ferrite substrate.…”