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Wessel, Jan;Schmalz, Klaus;Scheytt, Christoph;Kissinger, Dietmar:

A 120-GHz Electrical Interferometer for Contactless Permittivity Measurements With Direct Digital Read-Out.

IEEE Microwave and Wireless Components Letters 27(2): pp. 198-200, Feb 2017

Abstract

This work describes an electrical interferometer for contactless permittivity measurements working at 120 GHz. It was fabricated in a 130 nm SiGe process featuring an ft and fmax of 240 and 330 GHz. The on-chip system contains a 120 GHz VCO with a tuning range of 7 GHz featuring a divideby- 64 circuit to enable external PLL operation. The subsequent buffer provides 7 dBm of output power at 120 GHz. Additionally, the IC contains high-precision and high-resolution phase shifters based on a slow-wave transmission line approach with digital control for direct readout ability. A 120 GHz LNA with 17 dB gain and a power detector to provide DC output signals were realized on chip. It enables sample emulation capability by phase shift inducement in the measurement as well as a reference transmission line. In terms of phase detection, the system shows a sensitivity of 907.36 MHz/◦.

Weblink

http://ieeexplore.ieee.org/document/7845690/

Bibtex

@article{hniid=9521,
author = {Wessel, Jan and Schmalz, Klaus and Scheytt, Christoph and Kissinger, Dietmar},
title = {A 120-GHz Electrical Interferometer for Contactless Permittivity Measurements With Direct Digital Read-Out},
journal = {IEEE Microwave and Wireless Components Letters},
volume = {27},
number = {2},
pages = {198-200},
month = feb,
year = {2017},
}

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Permalink

https://www.hni.uni-paderborn.de/pub/9521