Title :
Optimum Design of 3-Db Branch-Line Couplers Using Microstrip Lines
Author :
Muraguchi, Masahiro ; Yukitake, Takeshi ; Naito, Yoshiyuki
Abstract :
A computer-aided design is described that makes it possible to reduce the internal impedance levels of branch-line couplers so that they may be physically constructed by microstrip lines, where the Fletcher-Powell search method has been used to optimize the design. Because microstrip lines are severely restricted in their usable impedance range, the 3-dB couplers presented here should be useful for numerous balanced-type components such as balanced mixers. The validity of the design has been experimentally verified in the microwave and millimeter-wave region.
Keywords :
Anisotropic magnetoresistance; Chebyshev approximation; Design automation; Design optimization; Directional couplers; Impedance; Microstrip components; Millimeter wave integrated circuits; Millimeter wave technology; Search methods;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.1983.1131568
