A Magnetic Field Tunable Yttrium Iron Garnet Millimeter-Wave Dielectric Phase Shifter: Theory and Experiment

Abstract

Abstract-A magnetically tunable passive narrow-band split-mode mm-wave phase shifter based on dielectric resonance in yttrium iron garnet (YIG) is investigated. The novelty here is the demonstration of a phase shifter in the frequency region between two split dielectric resonances in YIG. It is shown that, under certain conditions, the differential phase shift from the split modes add up, resulting in a larger phase shift than for a single mode phase shifter. Two prototype phase shifters operating in the U-and W-bands at frequencies much higher than ferromagnetic resonance (FMR) in YIG have been designed and characterized. Phase shifts up to 30 • with low losses and acceptable standing wave ratio are obtained for moderate bias magnetic fields. Equivalent transmission-line model taking into account coupling between the split resonances is presented and there is reasonable agreement between theory and experiment for both insertion loss and differential phase shift. Suggestions on further improvements of prototype filter characteristics have been outlined.

Improving Microwave Response Performance through Involvement of Gadolinium Dopant into Yttrium Iron Garnet

“…This study resulted in the lowest insertion loss value of 0.25 dB. The insertion loss value found in this study appears to be superior to those reported in the literature [18][19][20][21][22][23][24][25] . This lower insertion loss value indicates that the ferrite garnet sample obtained has a higher phase purity, meaning that the secondary phase is relatively very low or practically non-existent.…”

From optimization to dielectric resonator antenna (DRA) application of YIG: Synthesis approach

“…A similar approach was used by using other additives such as MgO, CuO, and LiBZn, respectively [8][9][10]. However, the presence of these additives usually results in with the formation of unnecessary secondary phases, such as BiFeO 3 and Bi 2 O 3 . Meanwhile, the issue of long sintering duration was addressed by the utilization of the microwave sintering method [11,12].…”

“…These properties are very useful, especially in microwave communication devices such as oscillators and phase shifters [1][2][3]. Many methods have been used to produce YIG, but the most economical, simple and practical method among them is the conventional solid-state reaction (CSSR).…”

Structural and magnetic properties of Dy3+ doped Y3Fe5O12 for microwave devices

“…This ferrimagnetic material is used widely in electronic devices for the microwave region [3,4] as well as phase shifters, magneto-optical [2] applications and also in wireless communications, surveillance, sensing and tracking [5,6]. Some magnetic performances such as coercive force and initial permeability, are strongly dependent on the microstructural aspects, i.e.…”