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Just arrived at the page to learn about DRAs; I was a bit confused by: "a block of ceramic material of various shapes, the dielectric resonator, mounted on a metal surface, a ground plane." -- is the 'block of ceramic material of various shapes' the dielectric resonator, or is that another thing? Lionfish0 (talk) 07:22, 15 October 2024 (UTC)[reply]
It is incorrect to say that there is no loss in a DRA. There is the dissipation factor or loss tangent of the material. In addition, the complex permittivity is dependent upon conductivity which changes with frequency. See, Advanced Engineering Electromagnetics by Balanis, [1]
