Miniature Broad-Band CPW 3-dB Branch-Line Couplers in Slow-Wave Structure
In: IEICE Transactions on Electronics, 2007-12-01, S. 2245-2253
Online
unknown
Zugriff:
This paper presents some structures of artificial coplanar waveguide with very slow phase velocity and their applications to a design of compact 3-dB branch-line couplers. The slow-wave structure is constructed by periodically loading both of series inductance and shunt capacitance. First, a basic miniature branch-line coupler is designed and consequently considerable size-reduction of about 1/4 is obtained. Next, a broadband design technique is described using open-circuited quarter-wavelength series-stubs added at each port as a matching network. By size-reducing the series-stubs and branchline sections, a very compact broad-band coupler with a good hybrid performance over a wide bandwidth of 31 percent or more is realized. The design concepts and procedures are verified both numerically and experimentally.
Titel: |
Miniature Broad-Band CPW 3-dB Branch-Line Couplers in Slow-Wave Structure
|
---|---|
Autor/in / Beteiligte Person: | Kawai, Tadashi ; Ohta, Isao ; Fujii, Takao ; Kokubo, Yoshihiro |
Link: | |
Zeitschrift: | IEICE Transactions on Electronics, 2007-12-01, S. 2245-2253 |
Veröffentlichung: | Institute of Electronics, Information and Communications Engineers (IEICE), 2007 |
Medientyp: | unknown |
ISSN: | 1745-1353 (print) ; 0916-8524 (print) |
DOI: | 10.1093/ietele/e90-c.12.2245 |
Schlagwort: |
|
Sonstiges: |
|