Philipp Neumaier

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A 245 GHz transmitter (TX) array with an integrated antenna-array for a gas spectroscopy system has been realized, which consists of a push-push VCO with a 1/64 frequency divider, power amplifiers, frequency doublers, and on-chip antennas with localized backside etching. The TX-frequency is tunable in the range from 238 GHz to 252 GHz. The TX-array is(More)
This paper reviews our recent work on transmitter (TX) and receiver (RX) circuits in SiGe BiCMOS technology for gas spectroscopy in the frequency ranges around 245 GHz and 500 GHz. The 245 GHz TX consists of a 122 GHz local oscillator (LO) and a frequency doubler, and the 245 GHz RX consists of a low noise amplifier (LNA), a LO, and an active subharmonic(More)
A compact gas spectroscopy system is demonstrated, which contains a transmitter (TX) and a receiver (RX) in SiGe BiCMOS, as well as a gas absorption cell. The sensitivity of this spectroscopy system is demonstrated by measuring the high-resolution 2f absorption spectrum (second harmonic detection) of gaseous methanol (CH3OH) at 238-252 GHz, and at 495-497(More)
he is head of a research group dealing with secure GNSS receivers and receivers for special applications. His main research interests focus on GNSS multi-band reception, integrated circuits and immunity to interference. Since the same year he works at the Fraunhofer Institute for Integrated Circuits IIS in the field of GNSS receiver development. His main(More)
This paper describes the system architecture and implementation results of a robust and flexible dual-frequency 2×2 array processing GNSS receiver platform. A digital front-end FPGA pre-processes the incoming raw ADC data and implements interference mitigation methods in time and frequency domain. An optional second FPGA card can be used to realize(More)
Elastic recoil detection (ERD) analysis is improved in view of depth resolution and the reliability of the measured spectra. Good statistics at even low ion ¯uences is obtained utilizing a large solid angle of 5 msr at the Munich Q3D magnetic spectrograph and using a 40 MeV 197 Au beam. In this way the elemental depth pro®les are not essentially altered(More)
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