Now showing items 1-10 of 33
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 ...
IR-UWB radar demonstrator for ultra-fine movement detection and vital-sign monitoring
In this paper an impulse-radio ultra-wideband (IR-UWB) hardware demonstrator is presented, which can be used as a radar sensor for highly precise object tracking and breath-rate sensing. The hardware consists of an impulse ...
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 ...
A 60 to 77 GHz switchable LNA in an RF-MEMS embedded BiCMOS technology
In this letter, a 60 to 77 GHz switchable low-noise amplifier is presented. The IC is realized in a radio frequency microelectro-mechanical systems embedded 0.25 µm SiGe-C BiCMOS technology. Measured results show that the ...
Multi-Gb/s analog synchronous QPSK demodulator with phase-noise suppression
In this paper, an IF quadrature phase-shift keying demodulator is presented, which performs phase and frequency synchronization in the analog domain. The presented demodulator can be utilized for short-range ultra-wideband ...
This article presented the possibilities of making microwave and mm-wave ICs more intelligent through a combination of established Si/SiGe BiCMOS technologies, which allow for complex ICs combining a multitude of high-speed ...
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 ...
Impulse generator targeting the European UWB mask
Beitrag zu einer Konferenz
This paper presents a monolithic impulse generator IC targeting the spectral mask for ultra-wideband applications allocated in the European Union. The multicycle impulse is based on a spike triggered resonant circuit and ...
A SiGe HBT low-power pulse generator for impulse radio ultra-wide band applications
Beitrag zu einer Konferenz
In this paper a compact ultra-wide band (UWB) pulse generator using SiGe HBT technology is presented. The proposed circuit uses a simple circuitry to generate a current spike on chip, which in turn triggers an under-damped ...