@inproceedings{0669893e933d45be8e94f0cae41d4c2a,
title = "A software-radio front-end for microwave applications",
abstract = "At microwave frequencies, in particular at frequencies beyond 10 GHz, no direct sampling receivers are available yet A look at the roadmap of the development of commercial analog-to-digital converters (ADC) shows clearly, that they can neither be expected in near future. We present a novel architecture, which is capable of direct sampling of band-limited signals at frequencies beyond 10 GHz by means of in over-sampling technique. The well-known Nyquist criterion states that wide-band digitisation of an RF-signal with a maximum frequency f requires a minimum sampling rate of 2·f. But for a band-limited signal of bandwidth B the demands for the minimum sampling rate of the ADC relax to the value 2·B. Employing a noise-forming sigma-delta ADC architecture even with a 1-bit-ADC a signal-to-noise ratio sufficient for many applications can be achieved. The key component of this architecture is the sample-and-hold switch. The required bandwidth of this switch must be well above 2·f. We designed, fabricated and characterized a preliminary demonstrator for the ISM-band at 2.4 GHz employing silicon Schottky diodes as a switch and SiGe-based MMICs as impedance transformers and comparators. Simulated and measured results are presented.",
keywords = "Analog-digital conversion, Application software, Bandwidth, Delta-sigma modulation, Frequency conversion, Microwave frequencies, Sampling methods, Signal to noise ratio, Switches, Wideband",
author = "M. Streifinger and T. M{\"u}ller and Luy, {J. F.} and Biebl, {E. A.}",
note = "Publisher Copyright: {\textcopyright} 2003 IEEE.; 4th IEEE Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems ; Conference date: 11-04-2003",
year = "2003",
doi = "10.1109/SMIC.2003.1196667",
language = "English",
series = "2003 Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems - Digest of Papers",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "53--56",
editor = "Ponchak, {George E.}",
booktitle = "2003 Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems - Digest of Papers",
}