-This paper gives the last UMS developments in the field of automotive radar at 77GHz. A complete front-end based on four MMICs is described, it is dedicated to FMCW radar for Collision Warning/Avoidance systems. A detailed characterization results are given for a single channel front-end. These designs already demonstrate high level of performance on industrial MMIC technologies.

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New microwave front-ends are more and more integrated and operate commonly at very high frequencies above 40GHz. So the chip to sub-system interconnections at millimetrewave frequencies play as key factor to address the main system requirements which are generally a low cost, a high reliability level with of course the best electrical performances. UMS has developed a 77GHz chip-set for automotive RADAR using a wire free connection called hot-via. This very broad band transition was optimised in W band in order to remain compatible with the existing chip designs and to be realistic in term of industrialisation, cost and assembly in heterogeneous microwave sub-systems.978-2-87487-007-1

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