A Novel Multilayer Approach for Low-Loss Millimeter Wave RF-/DC-Line Crossing

Abstract

A novel multilayer configuration for crossing of RF-IDC-lines at millimeter wave frequencies is presented. The DC-lines are realized in coplanar waveguide (CPW) technology in the groundplane of the RF microstrip line (MSL). In comparison to undefected MSL transmission loss can be minimized by implementing suitable filters in the CPWV Simulated results from a full-wave analysis are confirmed by measured scattering parameters at W-band.

Compact Multiple Crossovers in Millimeter-Wave Circuits

“…This is most likely related to the interference of the shared ground stubs of adjacent CPW. In comparison to the low-pass filters of [5] the overall decoupling performance is enhanced by this interaction. Fig.…”

“…Fig. 7(b) shows the back of a realized multiple crossover configuration and, for comparison, the single crossover with 5 th order low-pass filters from [5]. The size reduction is obvious.…”

“…It was shown in [5] that the coupling between MSL and CPW (without filter) strongly depends on the width of the CPW center conductor. In simulations the CPW center conductor width was varied while the CPW gap width was kept constant.…”

“…A low-loss solution for such a crossover was presented in [5]. The DC-line is realized as CPW in the MSL ground plane.…”