DocumentCode :
1538668
Title :
Integration of CPW quadrature couplers in multilayer thin-film MCM-D
Author :
Carchon, Geert ; De Raedt, Walter ; Nauwelaers, Bart
Author_Institution :
Interuniversitair Microelectron. Center, Leuven, Belgium
Volume :
49
Issue :
10
fYear :
2001
fDate :
10/1/2001 12:00:00 AM
Firstpage :
1770
Lastpage :
1776
Abstract :
In this paper, the design, integration, and measurement of quadrature couplers integrated in a multilayer thin-film multichip-module technology are discussed. We have investigated four- and six-finger coplanar-waveguide (CPW) Lange couplers and a coupler based on reentrant sections. Three methods for the design of CPW Lange couplers are compared for the first time. The method of Paolino consistently results in the best performance. The four-finger Lange coupler results in a -3.2+/-0.2-dB coupling bandwidth from 10.8 to 14.9 GHz, with a return loss better than -18 dB and an isolation better than -20 dB. The six-finger Lange coupler results in a -3.2+/-0.5-dB coupling bandwidth from 9.5 to 17 GHz, with a return loss and isolation better than -16 dB. The coupler using reentrant sections results in a -3.4+/-1.1-dB coupling bandwidth from 6.9 to 18.8 GHz with a return loss and isolation better than -21 dB. It is shown that CPW Lange couplers are not sensitive to planarization effects, while for the design of couplers using reentrant sections, the effect should be taken into account. The Lange couplers have the additional advantage that they are easier to design, have a lower insertion loss, and can be very well predicted using method-of-moments simulations
Keywords :
coplanar waveguide components; losses; method of moments; multichip modules; waveguide couplers; 10.8 to 14.9 GHz; 6.9 to 18.8 GHz; 9.5 to 17 GHz; CPW quadrature couplers; coplanar-waveguide Lange couplers; coupling bandwidth; insertion loss; isolation; method-of-moments simulations; multilayer thin-film MCM-D; planarization effects; reentrant sections; return loss; Bandwidth; Coplanar waveguides; Couplers; Design methodology; Insertion loss; Moment methods; Nonhomogeneous media; Planarization; Predictive models; Transistors;
fLanguage :
English
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9480
Type :
jour
DOI :
10.1109/22.954783
Filename :
954783
Link To Document :
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