Title :
Analysis and design of lumped- and lumped-distributed-element directional couplers for MIC and MMIC applications
Author :
Vogel, Ryszard W.
Author_Institution :
NobelTech, Jarfalla, Sweden
fDate :
2/1/1992 12:00:00 AM
Abstract :
An analysis of lumped-element and lumped-distributed-element directional couplers is described. The assumed generality of the ring-type four-port enables different types of directionality to be developed. The equations that make possible an idealized design of co-, contra- and trans-directional couplers for arbitrary power division and transformation ratio are derived. A design procedure for three-branch, lumped-element directional couplers that allows an impedance transformation between the input and output ports is also included. Computer simulations of the performance of various couplers with lumped elements represented by realistic models are included
Keywords :
directional couplers; distributed parameter networks; lumped parameter networks; MIC applications; MMIC applications; design procedure; directionality types; impedance transformation; lumped-distributed-element directional couplers; lumped-element directional couplers; power division; ring-type four-port; transformation ratio; Circuit simulation; Directional couplers; Equations; Equivalent circuits; Frequency; Impedance; MMICs; Microstrip; Microwave integrated circuits; Power transmission lines;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
