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In this paper a 24 GHz integrated front-end transceiver for vital signs detection (VSD) radars is described. The heterodyne radar transceiver integrates LO buffering and quadrature splitting circuits, up- and down-conversion SSB mixers and two cascaded receiver LNA's. The chip has been manufactured in a 0.25 µm SiGe:C BiCMOS technology and its size is 1390 × 2690 µm2. The transmitter demonstrates...
In contrast to what is generally assumed, the evolution of fT beyond the 45 nm CMOS generation may not be able to follow the ITRS roadmap. Moreover, the gap between intrinsic device and circuit performance is expected to increase with new generations, due to an increase in interconnect parasitic capacitance in the transistor pcell area. Such problems are not expected for SiGe processes. The move to...
Advances in micromachining technology can facilitate the integration of SAW (Surface Acoustic Wave) devices and CMOS circuitry on IC scale substrate for Monolithic fabrication. The optimal design and performance of these filters can be reached by using new Smart materials. The key component in the structure of the SAW device is the piezoelectric materials used which depends mainly on some important...
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