Quadrature directional couplers using multisection coupled lines

Author

Jee, Ki Mann ; Kim, Sung Wan ; Park, Dong Chul

Author_Institution

Dept. of Radio Sci. & Eng., Chung Nam Nat. Univ., Taejon, South Korea

Volume

10

Issue

2

fYear

2000

fDate

2/1/2000 12:00:00 AM

Firstpage

58

Lastpage

60

Abstract

New structure and design methods of directional couplers that can achieve both loose coupling and tight coupling by use of multisection coupled lines are presented. Output voltage formulas at each port are derived from the coupled-line theory. Measured results agree very well with predicted ones. Since the proposed couplers are very small in size and have suitable shape for high-density integrated circuits, they have potential applications in portable terminals for mobile communication systems

Keywords

circuit tuning; coupled transmission lines; directional couplers; integrated circuit design; microwave integrated circuits; coupled-line theory; high-density integrated circuits; loose coupling; mobile communication systems; multisection coupled lines; output voltage formulas; portable terminals; quadrature directional couplers; tight coupling; Conductors; Coplanar transmission lines; Coupling circuits; Design methodology; Dielectrics; Directional couplers; Impedance; Power transmission lines; Transmission line theory; Voltage;

fLanguage

English

Journal_Title

Microwave and Guided Wave Letters, IEEE

Publisher

ieee

ISSN

1051-8207

Type

jour

DOI

10.1109/75.843100

Filename

843100