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IEEE Transactions on Microwave Theory and Techniques
Volume 48 Number 1, January 2000

W-Band Single-Layer Vertical Transitions

Page 161.

Abstract:

Vertical single-layer transitions operating at W-band frequencies have been developed. The designs are uniplanar, use electromagnetic coupling, and do not require via holes or air bridges. The first transition uses coplanar-waveguide-mode coupling and results in an insertion loss of better than 0.6 dB over the whole band, with a loss of 0.25 dB from 85 to 110 GHz. The return loss is better than -10 dB from 75 to 110 GHz. The second transition uses microstrip-mode coupling and results in a 0.2-dB insertion loss over the whole W-band. These transitions can prove very useful for millimeter-wave packaging and vertical interconnects.

References

1. R. W. Jackson and D. W. Matolak, "Surface-to-surface transition via electromagnetic coupling of coplanar waveguides", IEEE Trans. Microwave Theory Tech., vol. MTT-35, pp.  1027- 1032 , Nov.  1987 .
2. G. Strauss, P. Ehret and W. Menzel, "On-wafer measurement of microstrip-based MIMIC's without via holes", in IEEE-MTT-S Int. Microwave Symp. Dig., 1996, pp.  1399- 1402.