Florian Poprawa

A Novel Approach for a Periodic Structure Shielded Microstrip Line to Rectangular Waveguide Transition

A microstrip line to rectangular waveguide transition at 77 GHz is presented in this paper. The transition based on a resonant slot aperture is processed on a metal reinforced soft substrate. A periodically structured shield is used to suppress the emissions and the parallel plate modes which helps to increase the performance of the transition. The simple fabrication enables the design of low cost radar modules on a PCB substrate with a rectangular waveguide interface.

A novel planar level chip interconnection for unpackaged MMICs in the millimeter wave frequency range

This paper presents a novel planar interconnection technology for unpackaged monolithic microwave integrated circuits (MMICs), which work in the millimeter wave (mmw) frequency range. Compared to standard wire bonding, the new technique provides considerable advantages with regard to the electrical characteristics and manufacturing processes. The manufacturing process for a module containing surface mounted devices (SMD) and unpackaged MMICs is described. In order to determine the electrical behavior, a model of a single interconnection is developed using a full wave field simulation and compared to a model of a wire bond. Finally, the insertion losses are determined by measuring the output power of an active frequency doubler, which is assembled using both technologies. Because of the availability of commercial MMICs an operating frequency of 77 GHz is considered.

Waveguide transition to feed a fully PCB integrated dielectric rod antenna

A microstrip line-to-circular waveguide transition is described which operates at a nominal design frequency of 77 GHz. In order to improve the transmission characteristics, an additional periodically structured shield is used. The transition is capable of exciting a dielectric rod antenna, thus enabling the realization of radar modules on a PCB substrate with a dielectric rod antenna interface.