By Vadim Issakov
There are non-stop efforts focussed on enhancing street site visitors protection around the globe. quite a few car security measures equivalent to motive force counsel structures were invented. Many driving force tips positive aspects depend on radar-based sensors, yet are high priced. awareness of reasonably cheap radar front-end circuits could permit their implementation in more cost-effective economic system automobiles, significantly contributing to site visitors safeguard. rate relief calls for high-level integration of the microwave front-end circuitry, particularly analog and electronic circuit blocks co-located on a unmarried chip. The publication provides the layout, implementation, and characterization of microwave receiver circuits in CMOS and SiGe bipolar applied sciences. The applicability of a customary electronic 0.13 μm CMOS know-how for consciousness of a 24 GHz narrow-band radar front-end sensor is investigated. The awarded circuits are appropriate for car, commercial and client functions, as e.g. lane-change assistant, door openers or alarms.
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Extra info for Microwave Circuits for 24 GHz Automotive Radar in Silicon-based Technologies
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Additionally, the main inductor parameters, evaluated from the measured and fitted inductor data, are compared in Fig. 5. As can be observed, the equivalent circuit achieves an accurate fit to the inductor behavior. The presented analysis provides simple analytical expressions for fitting frequency dependent S-parameter data of on-chip inductors in the LSE sense. The optimal values of an equivalent single-π circuit are obtained in a direct non-iterative manner. This can be useful for a quick insight into the main equivalent parameters of a spiral inductor in a certain frequency range.
However, obtaining values of these external capacitances is usually cumbersome and time-consuming. Therefore, two modeling techniques are proposed in this work. 1 describes a technique for fast fitting of equivalent circuit values to the given Sparameters data of inductors. 2 describes a method for fast estimation of external parasitic metallization capacitance of transistor finger layout. 1 Analytical Fitting of On-Chip Inductors A significant amount of research has been focused on modeling of inductors over the past years.