Image guide couplers with dielectric coupling elements and radiation reduction |
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Authors: | Dietmar Kö ther Ingo Wolff |
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Affiliation: | (1) Department of Electrical Engineering, Duisburg University, Bismarckstrae 81, D-4100 Duisburg 1, FRG |
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Abstract: | Directional couplers in image guide technique for millimeter-wave circuits are discussed, and steps to improve their properties are demonstrated. The simple two-line-9 dB coupler with periodical coupling is compared to a design with an intermediate dielectric coupling element to reduce the frequency dependence. Radiation from the waveguide bends can be reduced significantly by inserting absorber materials at critical points. Experimental results for a-3 dB coupler are also given. |
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Keywords: | Dielectric lines couplers |
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