DocumentCode :
1243483
Title :
Novel directional couplers using broadside-coupled coplanar waveguides for double-sided printed antennas
Author :
Tefiku, Faton ; Yamashita, Eikichi ; Funada, Jun
Author_Institution :
Denki Kogyo Co. Ltd., Tokyo, Japan
Volume :
44
Issue :
2
fYear :
1996
fDate :
2/1/1996 12:00:00 AM
Firstpage :
275
Lastpage :
282
Abstract :
Two types of tight-coupling, broadband directional couplers employing open broadside-coupled coplanar waveguides (BC CPWs) are proposed which can easily be integrated with printed strip antennas. The first type uses the BC CPWs with dielectric overlays above and below the center substrate, while the second type uses the nonuniform BC CPWs. The scattering parameters of these directional couplers are derived with the even-odd mode analysis method based on the quasi-TEM wave approximation. Two 3-dB directional couplers, one for each type, are designed and measured characteristics are compared with theoretical results
Keywords :
S-parameters; coplanar waveguides; directional couplers; microstrip antennas; waveguide antenna arrays; broadside-coupled coplanar waveguides; center substrate; dielectric overlays; directional couplers; double-sided printed antennas; even-odd mode analysis method; quasi-TEM wave approximation; scattering parameters; Bandwidth; Broadband antennas; Coplanar waveguides; Dielectric substrates; Dipole antennas; Directional couplers; Directive antennas; Microstrip antenna arrays; Nonhomogeneous media; Scattering parameters;
fLanguage :
English
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9480
Type :
jour
DOI :
10.1109/22.481577
Filename :
481577
Link To Document :
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