Designing a downsized quadrature directional coupler
Denis A. Letavin
Abstract
To miniaturize directional couplers, the replacement of their quarter-wave sections with electrodynamic structures with equivalent characteristics at smaller physical dimensions is used. It is shown that the structures used have filtering properties and act as low-pass filters. It is set at what cutoff frequency the low-pass filters must be calculated to obtain a phase shift of 90 degrees.
Topics & Concepts
CutoffCutoff frequencyQuadrature (astronomy)Power dividers and directional couplersHybrid couplerAcousticsLow-pass filterPhysicsElectronic engineeringOpticsEngineeringComputer scienceTelecommunicationsBandwidth (computing)Quantum mechanicsMicrowave Engineering and WaveguidesAdvanced Antenna and Metasurface TechnologiesOptical Coatings and Gratings