Lisa Verweyen

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Acanthocephalans are attractive candidates as model organisms for studying the ecology and co-evolutionary history of parasitic life cycles in the marine ecosystem. Adding to earlier molecular analyses of this taxon, a total of 36 acanthocephalans belonging to the classes Archiacanthocephala (3 species), Eoacanthocephala (3 species), Palaeacanthocephala (29(More)
A dual-band/tri-mode receiver IC for CDMA based mobile systems has been fabricated using our 6"-PHEMT production line, comprising the complete RF front end and one IF stage. The first LNA stage exhibits an input IP3 of +8 dBm and a noise figure of 1.0 dB, the overall gain of the complete receiver is 26.0 dB. The current consumption only is 17 mA, for a(More)
A production oriented GaAs HEMT MMIC chipset for a 77 GHz FMCW automotive radar system is reported. It differs mainly in two aspects from the GaAs MMIC solutions described earlier: (1) 0.12 /spl mu/m gatelength PHEMTs are fabricated by optical stepper lithography, (2) a coplanar design is used. A fully passivated PHEMT fabrication process is reported with(More)
A very compact coplanar transceiver MMIC using space-saving dual-gate pHEMTs has been developed for an FMCW radar system. The chip consists of a two-stage medium power amplifier, a single-ended resistive mixer, a rat-race coupler and a single-stage high-gain amplifier, based on 0.15 /spl mu/m GaAs pHEMT technology. An output power of 10 dBm and a conversion(More)
Integrated transmit and receive MMICs for automotive applications have been realized in coplanar waveguide technology, using a 0.15 /spl mu/m PHEMT process. The transmitter chip delivers an output power of 10 dBm at the antenna and the LO-ports. The receiver has an overall conversion gain of 10 dB for an LO-power of -10 dBm. Both chips only require an area(More)
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