DocumentCode :
1760240
Title :
Comments on “A Rigorous Design Methodology for Compact Planar Branch-Line and Rat-Race Couplers With Asymmetrical 
-Structures”
Author :
Hee-Ran Ahn
Author_Institution :
Sch. of Electr. Eng. & Comput. Sci., Seoul Nat. Univ., Seoul, South Korea
Volume :
61
Issue :
4
fYear :
2013
fDate :
41365
Firstpage :
1728
Lastpage :
1729
Abstract :
In the above paper, the high-low impedance (HLI) section and its characteristic impedance of ZHLI are suggested to reduce the size of branch-line and rat-race couplers. The characteristic impedance of ZHLI, however, appears to be incorrect for the application of the asymmetric structures, such as the HLI sections.
Keywords :
waveguide couplers; HLI section; asymmetrical T-structures; characteristic impedance; compact planar branch-line couplers; high-low impedance section; rat-race couplers; rigorous design methodology; Couplers; Design methodology; Frequency conversion; Impedance; Power dividers; Scattering parameters; Asymmetric structures; compact rat-race couplers; compact ring- and branch-line hybrids; three-port 3-dB power dividers;
fLanguage :
English
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9480
Type :
jour
DOI :
10.1109/TMTT.2013.2250517
Filename :
6480897
Link To Document :
