Design and Development of Directional Coupler for Ranging Transponder of IRNSS at 3.4 GHz

Communication System Engineering

Directional couplers are used in RF and microwave signal routing for isolating, separating or combining signals. They find use in a variety of measurement applications: Power monitoring, Source leveling, Isolation of signal sources, Swept transmission and reflection measurements.But Directional couplers are operating at different frequency band for different application. I will design Directional couplerat 3.4GHz frequency in Ranging Transponder of IRNSS system using Microstrip Technique. Design of Directional coupler is done by using Advance Design System (ADS). For conventional microstrip directional coupler, we could not achieve the accepted results. By using lumped components (Inductive or capacitive compensation techniques) or multi section technique or different designs, results can be improved.

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