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The Unbalanced Line Directional Coupler
This study analyzes the coupling and directional characteristics of an unbalanced line directional coupler. Certain assumptions were made to idealize the conditions of operation, but an extension of the method used in the analysis would make it suitable for adaption to any particular conditions of operation. The results of this analysis are the basic design equations needed for the design of unbalanced line directional couplers.
Nonuniform Line Microstrip Directional Couplers and Filters
This text sets out to provide a source of design techniques for leading to reduction in expense, size and weight of directional couplers and filters. It also gives step-by-step procedures for enhancing circuit performance. Numerous design examples and verified measured results for ultrawideband, bandpass, periodic and co-directional couplers are provided.
Measurement of the Directivity of a Coaxial Directional Coupler by Use of a Length of Precision Transmission Line
This memorandum describes the quarter-wavelength line method of measuring the directivity of a coaxial coupler. It gives the error analysis of the method in detail and shows that the method has the capability of precise and repeatable measurements.
