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Yoneyama and S. Nishida: \u201cNonradiative dielectric waveguide for millimeter-wave integrated circuits,\u201d IEEE Trans. Microw. Theory Techn. <b>29<\/b> (1981) 1188 (DOI: 10.1109\/TMTT.1981.1130529)."},{"key":"2","unstructured":"[2] T. Yoneyama, <i>et al.<\/i>: \u201cCoupling characteristics of nonradiative dielectric waveguides,\u201d IEEE Trans. Microw. Theory Techn. <b>31<\/b> (1983) 648 (DOI: 10.1109\/TMTT.1983.1131563)."},{"key":"3","unstructured":"[3] T. Yoneyama, <i>et al.<\/i>: \u201cAnalysis and measurements of nonradiative dielectric waveguide bends,\u201d IEEE Trans. Microw. Theory Techn. <b>34<\/b> (1986) 876 (DOI: 10.1109\/TMTT.1986.1133460)."},{"key":"4","unstructured":"[4] H. Yoshinaga and T. Yoneyama: \u201cDesign and fabrication of a nonradiative dielectric waveguide circulator,\u201d IEEE Trans. Microw. Theory Techn. <b>36<\/b> (1988) 1526 (DOI: 10.1109\/22.8917)."},{"key":"5","unstructured":"[5] T. Miyashita and T. 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