A High Directivity Microstrip Coupler Technique
- 1 January 1970
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
Abstract
Typically loosely coupled backward wave microstrip couplers have directivities which decrease with increasing frequency. High directivity becomes more difficult to obtain as the coupling is loosened. The problem appears to be that the propagating velocities of the odd and even modes are not equal. This paper deals with a technique which equalizes these velocities up to an arbitrarily high frequency.Keywords
This publication has 1 reference indexed in Scilit:
- Perturbations of the Critical Parameters of Quarter-Wave Directional Couplers (Correspondence)IEEE Transactions on Microwave Theory and Techniques, 1967