Now showing items 1-4 of 4
Millimeter-wave MEMS-loaded transmission-line phase shifters
(Universität Ulm, 2016-08-02)
Beam forming and scanning at microwave and millimetre-wave frequencies (1 GHz – 100 GHz) using electronic steerable array (ESA) antennas, requires phase shift and time-delay units. RF path phase shifters provide an attractive ...
PLL based fully-integrated LO generation for wideband RF front-ends
(Universität Ulm, 2018-05-16)
This dissertation describes Phase Locked Loop (PLL) based Local Oscillator (LO) designs for RF front-end modules targeting wideband wireless communications systems from microwave to millimeter-wave ranges. With the increase ...
Some studies of quasi-planar antennas
(Universität Ulm, 2016-12-21)
Recent decades have witnessed the rapid evolution of wireless sensing and communication systems aimed at the consumer market. The antenna is a key component in any of these systems, and the selection criteria for a commercial ...
SiGe BiCMOS circuits and system demonstrators for high range resolution mm-wave radars
(Universität Ulm, 2019-04-11)
The potential and performance of the silicon-based millimeter wave radar building blocks and systems have been demonstrated in many ways, including a wideband chirp generator, several high-performance frequency multiplier ...