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On Designing a Compact Two-Way Differential Power Divider/Combiner Based on a SiGe BiCMOS Process for Automotive Radar Applications Using FEM Simulators

Abstract:

In the last years has been remarkable the development of technologies for millimetric wave applications; however, the limitation to its growth has been the cost of implementation. People who are building these components have exceptional motivation to develop low-cost, reduced-size, and compact technologies. In this paper, it was designed a compact silicon-germanium BiCMOS two-way differential power divider/combiner that does not use a balun in both input and output ports. The proposed divider/combiner is implemented in three metal layers of the BiCMOS 9MW technology of STMicroelectronics©; this characteristic, besides the no need for a balun, makes it a compact configuration appropriate for determined highly integrated chips at millimeter-wave bands, e.g., long and short-range automotive radar applications. The results obtained by full-wave simulations based on the Finite Element Method show a return loss of 28.5 24 GHz frequency for short-range radars and at a frequency of 77 GHz operation for long-range radars a return loss of 39.2 dB.