A method for characterizing coplanar waveguide‐to‐microstrip transitions, and its application to the measurement of microstrip devices with coplanar microprobes

This paper presents a method for characterizing coplanar waveguide-to-microstrip (CPW-M) transitions by using on-wafer coplanar (CPW) microprobes. It is based on extracting the transmission matrix of the CPW-M transition from the measurement of the S parameters of two microstrip transmission lines of different lengths, each of which includes two CPW-M transitions. To verify the proposed method, the S parameters of a zero-length line, which is composed of two CPW-M transitions (“thru” connection) and has not been used in the transition characterization, are measured up to 40 GHz and are compared to those extracted and obtained from electromagnetic simulations. The method is applied to the measurement of a microstrip coupled-line filter embedded in CPW-M transitions. © 2003 Wiley Periodicals, Inc. Microwave Opt Technol Lett 39: 373–378, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.11222

[1]  Burkhard Schiek,et al.  Robust algorithms for Txx network analyzer self-calibration procedures , 1994 .

[2]  J. Laskar,et al.  Development of On-Wafer Microstrip Characterization Techniques , 1996, 47th ARFTG Conference Digest.

[3]  G. F. Engen,et al.  Thru-Reflect-Line: An Improved Technique for Calibrating the Dual Six-Port Automatic Network Analyzer , 1979 .

[4]  Gabriel M. Rebeiz,et al.  A wideband CPW-to-microstrip transition for millimeter-wave packaging , 1999, 1999 IEEE MTT-S International Microwave Symposium Digest (Cat. No.99CH36282).

[5]  Francesc Purroy,et al.  New theoretical analysis of the LRRM calibration technique for vector network analyzers , 2001, IEEE Trans. Instrum. Meas..

[6]  Gabriel M. Rebeiz,et al.  W-Band finite ground coplanar waveguide (FGGPW) to microstrip line transition , 1998, 1998 IEEE MTT-S International Microwave Symposium Digest (Cat. No.98CH36192).

[7]  Janusz Grzyb,et al.  Characteristic Impedance Deembeding of Printed Lines with the Probe-Tips Calibrations , 2002, 2002 32nd European Microwave Conference.

[8]  Gabriel M. Rebeiz,et al.  TU2E-3 Finite Ground Coplanar Waveguide (FGCPW) to Microstrip Line Transition , 1998 .

[9]  J. P. Mondal,et al.  Propagation constant determination in microwave fixture de-embedding procedure , 1988 .

[10]  W. Wiatr,et al.  Coplanar-waveguide-to-microstrip transition model , 2000, 2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017).

[11]  K.A. Zaki,et al.  Novel design for coplanar waveguide to microstrip transition , 2001, 2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157).

[12]  Bart Nauwelaers,et al.  A simple error correction method for two-port transmission parameter measurement , 1998 .

[13]  C. Law,et al.  Broadband characterisation of CPW transition and transmission line parameters for small reflection up to 100 GHz , 2000, 2004 RF and Microwave Conference (IEEE Cat. No.04EX924).

[14]  R. Marks.  A multiline method of network analyzer calibration , 1991 .