DESIGN AND IMPLEMETATION OF DIRECTIONAL COUPLER USING RING-RESONATOR

Abstract

Directional Couplers and Power Dividers are the device used in the field of RF technology. Directional Coupler are used to couple a fixed amount of EM power in the transmission line so that that particular port can be used to feed the Electromagnetic power to a different circuit. And the important property of the directional coupler is that they couple power only in one direction. Directional Couplers and power Dividers have so many applications including; to combine the feed from an antenna and to the antenna, sampling the signal so that it can be used for the measurement and monitoring, for filtering the frequency, providing taps for TV, and they are also used to seprate the transmitted signal and received signal in the telecommunication. In this project work I have studied about the different topologies for the design and implementation of the Directional Coupler. In my survey work I come to know about lots of techniques and I have tried to explain all the techniques. This project work explain the advantages and disadvantages of the presented techniques so that the designer can choose the techniques according to his requirements. In this project I have selected the Ring-Resonator based technique and by using that technique I have designed and implemented a Directional Coupler for 2.4 GHz frequency.