A mathematical model for the impedance of the cavity-backed slot antenna |
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Authors: | Long S |
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Affiliation: | University of Houston, Houston, TX, USA; |
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Abstract: | A mathematical model is derived that relates the impedance of a cavity-backed slot antenna to that of an identical slot which is free to radiate on both sides of a large ground plane. The model, which utilizes empirical constants from a previous experimental investigation, provides a continuously variable function of frequency and cavity depth for the impedance of a cavity-backed slot of fixed length and cavity cross section. This function is then compared with previously found experimental values and two theoretical solutions, one using a variational method and the other using the complex Poynting theorem. |
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