3-Port Circulator for X-Band Radar 


Vol. 40,  No. 2, pp. 355-362, Feb.  2015


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  Abstract

In this study, we have fabricated 9.385[GHz] circulator that is composed of WR112 waveguide and Ferrite for X-band radar. For designing Ferrite, B/R mode(Below Resonance mode) was used and calculated the condition of 120 degree rotation of the electric field in Ferrite and calculated internal DC magnetic field and external DC magnetic field. Also, dielectric materials of the same shape with Ferrite was filled between two Ferrite for improving the performance of the circulator, including impedance matching, bandwidth, quality factor, insertion loss. To obtain optimum shape of the Ferrite and dielectric material, we used CST MWS. Simulation result of the circulator is that 1.02 : 1 VSWR, -40dB isolation, 0.2dB insertion loss and measurement result is that 1.03 : 1, -38dB, 1.2dB at 9.385[GHz]. We can get good agreement at isolation and VSWR, but insertion loss was 1 dB great than simulation result.

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  Cite this article

[IEEE Style]

S. Yoon, "3-Port Circulator for X-Band Radar," The Journal of Korean Institute of Communications and Information Sciences, vol. 40, no. 2, pp. 355-362, 2015. DOI: .

[ACM Style]

Sung-Hyun Yoon. 2015. 3-Port Circulator for X-Band Radar. The Journal of Korean Institute of Communications and Information Sciences, 40, 2, (2015), 355-362. DOI: .

[KICS Style]

Sung-Hyun Yoon, "3-Port Circulator for X-Band Radar," The Journal of Korean Institute of Communications and Information Sciences, vol. 40, no. 2, pp. 355-362, 2. 2015.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880