Title :
A Synthesis Procedure for Designing 90° Directional Couplers with a Large Number of Sections
Author :
Ulriksson, Bengt
Abstract :
A synthesis method for designing symmetrical directional couplers with an arbitrary realizable coupling is described. The method is based on a transformation of the coupling to the time domain, where the couplings of the different sections are easily identified. The fundamental operation of the method is the Fast Fourier Transform, which makes it very efficient in computer time and memory requirements. The method is illustrated by the design of a 8.34+-0.3-dB equal-ripple coupler with 201 sections.
Keywords :
Design automation; Directional couplers; Fast Fourier transforms; Filters; Impedance; Integrated circuit synthesis; Microwave communication; Microwave devices; Microwave integrated circuits; Reflection;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.1982.1131224
