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A methodology for synthesis (leading to physical dimensions) of multilayer asymmetric coupled microstrip lines using artificial neural network models is presented. Models are appropriate for design and optimization of multilayer configurations for circuits like filters, baluns, and directional couplers. Proposed methodology is demonstrated by designing a two‐layer coupled line filter. ©1999 John Wiley & Sons, Inc. Int J RF and Microwave CAE 9: 175–186, 1999.

This paper describes a design procedure for multilayer end-coupled band-pass filters. The two-layer configuration overcomes the narrow band restriction existing in single-layer configurations. A design procedure has been developed using a full-wave electromagnetic simulation program. Also, the design procedure developed is verified by experimental results. 0-7803-5135-5/99/$10.00 0 1999 IEEE

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The term “microwave circuits” is used to identify the electrical circuits used at microwave frequencies for performing signal processing functions like amplification, frequency conversion, mixing, detection, phase shifting, filtering, and power dividing. By “microwave frequencies,” we refer to electromagnetic signals whose wavelength is in centimeters, roughly from 30 cm to 1 mm with the corresponding frequencies ranging from 1GHz (GHz=10 9  Hz) to 300 GHz. band. Microwave frequencies present several interesting and unusual features not found in other portions of the electromagnetic frequency spectrum. These features make microwaves uniquely suitable for several useful applications in telecommunications, radar, industrial heating and sensors, and so on. The most common consumer application of microwaves is the domestic microwave oven used for food processing.