A novel compact three-dimensional CMOS branch-line coupler using the meandering ECPW, TFMS, and buried micro coaxial technologies at 60 GHz
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This paper proposes a new approach for realizing a compact 3-D 90° hybrid coupler incorporating compact meandered elevated coplanar waveguides (ECPW), thin-film microstrip (TFMS) transmission lines, and micro coaxial shunt stub loading. The design technique has been successfully demonstrated using a multi-layer 90nm CMOS process. The proposed coupler takes advantage of the multi-level metallization processes offered in CMOS technology. The intrinsic area of the fabricated 3-D hybrid coupler is significantly reduced with a size reduction of 81% in circuit area at 60 GHz as compared to that of a conventional hybrid coupler using the ECPW/TFMS configuration. Simulated and experimental results are presented in support of the novel miniature coupler.
[1] W. Heinrich,et al. High-impedance coplanar waveguides with low attenuation , 1996 .
[2] B. Floyd,et al. 60GHz transceiver circuits in SiGe bipolar technology , 2004, 2004 IEEE International Solid-State Circuits Conference (IEEE Cat. No.04CH37519).
[3] K. Hettak,et al. Compact MMIC CPW and asymmetric CPS branch-line couplers and Wilkinson dividers using shunt and series stub loading , 2005, IEEE Transactions on Microwave Theory and Techniques.