Title :
A quasi-TEM design method for 3 dB hybrid couplers using a semi-reentrant coupling section
Author :
Nakajima, Masahiro ; Yamashita, E.
Author_Institution :
Univ. of Electro-Commun., Tokyo
fDate :
11/1/1990 12:00:00 AM
Abstract :
An effective quasi-TEM design method for 3-db hybrid couplers using a semi-reentrant coupling section is presented. The analysis is based on the use of the rectangular boundary division method for solving the boundary value problem, including thick-strip conductors in an inhomogeneous medium. A trial design of a microstrip 3-dB coupler using substrates of low dielectric constant has been carried out by adding a sequential optimisation algorithm to the analysis method. Measured parameters of the designed 3-dB hybrid coupler are compared with the theoretical ones
Keywords :
boundary-value problems; strip line components; waveguide couplers; 3 dB hybrid couplers; boundary value problem; inhomogeneous medium; low dielectric constant substrate; microstrip; quasi-TEM design method; rectangular boundary division method; semi-reentrant coupling section; semireentrant coupling; sequential optimisation algorithm; thick-strip conductors; Algorithm design and analysis; Boundary value problems; Conductors; Couplers; Design methodology; Design optimization; Dielectric constant; Dielectric measurements; Dielectric substrates; Microstrip;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
