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Performance Improvement of Slot-Coupled Microstrip Directional Coupler Using Periodic Stubs  

Kim Jong-Sung (School of Engineering, Information and Communications University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.41, no.6, 2004 , pp. 87-92 More about this Journal
Abstract
Several stubs are added to a rectangular slot for giving an improvement in both return loss and isolation for a slot-coupled microstrip directional coupler. Its closed-form design equations are derived by velocity equalization of two normal modes and network equivalence. It was verified that nearly ideal performance is achievable by design examples.
Keywords
Microstrip; Slot; Coupler; Stub; Isolation;
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  • Reference
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