IEICE Information and Communication Technology Forum
Design of a superconducting antenna integrated with a diplexer for radio-astronomy applications
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The design of a compact front-end diplexer for radio-astronomy applications was done with a self complementary bowtie antenna, a 3dB T-junction splitter and two pass-band fractal filters. The diplexer structure has been optimized by using an evolutionary algorithm, namely the Particle Swarm Optimization (PSO). The optimization is done by minimizing a suitable cost function that represents the difference between the diplexer requirements and the performance obtained by a set of randomly generated trial solutions. An X-band scale model prototype of the final diplexer in the 10 and 14.66 GHz frequency bands was fabricated and tested. A good agreement was found between numerical and experimental results.