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Dielectric resonator formed by polygonal openings in a dielectric substrate, and a filter, duplexer, and communication apparatus using same Grant 6,184,758 - Ishikawa , et al. February 6, 2 | 2001-02-06 |
Dielectric lens antenna having heating body and radio equipment including the same Grant 6,175,335 - Ishikawa , et al. January 16, 2 | 2001-01-16 |
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Dielectric lens apparatus Grant 5,900,847 - Ishikawa , et al. May 4, 1 | 1999-05-04 |
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