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ABSTRACT: A new ultra-wideband, low-loss and small-size coplanar waveguide
(CPW) to coplanar strip (CPS) transition which can be used from DC to
110 GHz is presented. The proposed transition connects CPW with CPS by
the reformed air-bridge. Two ground planes of CPW are tied at their ends
by a line and the centre of the line is connected to the ground strip of
CPS by another line. Owing to the symmetry of the proposed structure,
the currents of two ground planes of CPW are combined with the same
phase and transferred to the ground strip of CPS. With height of 3
μm, the signal line of CPW passes over two connecting lines and is
connected to the signal strip of CPS. For the back-to-back transition
structure, insertion loss <1 dB and return loss >15 dB are
obtained from 0.5 to 110 GHz
Electronics Letters 07/2002; · 0.96 Impact Factor
