Design of a new coplanar isolator made from YIG film operating in the X-frequency band

Abstract : The miniaturization of devices and the increase of operating frequencies are two important issues for communication system development. This requires a high degree of integration, higher performance and lower cost. Isolator is an important non-reciprocal passive component for source protection. In most cases, the non-reciprocal effect is based on field displacement phenomenon induced by a magnetized ferrite material. In this paper we propose a new design of a coplanar isolator based on field displacement, composed of a non-symmetrical coplanar transmission line, made from a ferrite layer and ground plane below. Simulations were performed using HFSS software. Measurements were made on a first 1000 μm-thick YIG film sample giving 1 dB of insertion losses and 17 dB isolation and on a second sample made from a 150 μm-thick YIG ferrite sample giving an insertion loss lower than 2 dB. Interesting applications of this isolator structure are considered.
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Submitted on : Tuesday, September 18, 2012 - 2:44:23 PM
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S. Kirouane, D. Vincent, E. Verney, O. Zahwe, B. Payet-Gervy, et al.. Design of a new coplanar isolator made from YIG film operating in the X-frequency band. European Physical Journal: Applied Physics, EDP Sciences, 2011, 57 (1), pp.10602. ⟨10.1051/epjap/2011110091⟩. ⟨ujm-00733356⟩

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