Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Herbert Jager"'
Publikováno v:
IEEE Transactions on Circuits and Systems II: Express Briefs. 64:847-851
Frequency-modulated continuous wave radar systems suffer from permanent leakage of the transmit signal into the receive path. Besides leakage within the radar device itself, an unwanted object placed in front of the antennas causes so-called short-ra
Publikováno v:
Microwave and Optical Technology Letters. 52:639-642
A behavioral model describing the behavior of active mixers in the linear and the saturation mode of operation is presented. The model allows the simulation of effects caused by high-level blocking signals. A 77-GHz multi-tone signal is used for char
Autor:
Herbert Jager, Stefan Scheiblhofer, Stefan Schuster, Reinhard Feger, Andreas Stelzer, Christoph Wagner
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 57:1020-1035
This paper describes a novel frequency-modulated continuous-wave radar concept, where methods like nonuniform sparse antenna arrays and multiple-input multiple-output techniques are used to improve the angular resolution of the proposed system. To de
Publikováno v:
2015 Austrian Workshop on Microelectronics.
Estimation of phase noise (PN) has become economically feasible for integration in many of today's semiconductors. Several contributions propose concepts that obtain a good estimate of the PN's power spectrum without even requiring a reference oscill
Publikováno v:
2012 IEEE/MTT-S International Microwave Symposium Digest.
In this work a rat-race based microstrip coupler, usable to realize monostatic RF systems, is presented. The coupler combines the two functions of separating the transmit (TX) and receive signal together with the conversion from a differential to a s
Autor:
Florian Dober, Josef Bock, Herbert Jager, Jurgen Minichshofer, Markus Treml, Linus Maurer, Maciej Wojnowski, Christoph Wagner, Rudolf Lachner, Johannes Platz
Publikováno v:
2012 IEEE Radio Frequency Integrated Circuits Symposium.
In this paper, a 77-GHz radar receiver is presented, which comes in a wafer level package and thus eliminates the need for wire bonding yielding significant cost reduction. The high integration level available in the productive Silicon-Germanium (SiG
Publikováno v:
2010 Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems (SiRF).
This paper presents a differential current re-use stacked double common-emitter stage low-noise amplifier and corresponding receiver frontend for 77 GHz automotive radar systems. Both circuits have been manufactured in an improved SiGe∶C HBT techno
Autor:
Reinhard Feger, Stefan Scheiblhofer, Herbert Jager, Hans Peter Forstner, Andreas Stelzer, Florian Starzer, Alexander Fischer, Christoph Wagner
Publikováno v:
2010 Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems (SiRF).
A novel radar frontend for 77 GHz mid-range-radar (MRR) and short-range-radar (SRR) applications is presented. The radar sensor makes use of a Colpitts oscillator, frequency multipliers, and a transceive (TRX) mixer. A single sensor contains up to fo
Autor:
Herbert Jager, Florian Starzer, Alexander Fischer, Hans Peter Forstner, Andreas Stelzer, Dietmar Kissinger, Christoph Wagner
Publikováno v:
2009 Asia Pacific Microwave Conference.
An integrated 19-GHz Colpitts oscillator for a 77-GHz FMCW automotive radar frontend application is presented. The Colpitts oscillator has been realized in a fully differential circuit architecture. The VCO's 19GHz output signal is buffered with an e
Publikováno v:
2009 IEEE MTT-S International Microwave Symposium Digest.
A 77-GHz phased-array radar transmitter that is based on fully integrated, differential, cascadable transceiver circuits is presented. The building blocks of the 77-GHz IQ transceiver are explained in detail, along with measurement results of the tra