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Title: Frequency and Antenna Selection Effects on Accuracy of Free Space Radar
Author: Gerhard Jansson
Source: 2018 Canadian School of Hydrocarbon Measurement
Year Published: 2018
Abstract: Microwave radar for level measurement has become a preferred and one of the most trusted technologies in many of todays industrial applications, both Guided Wave and Free-space. Four different frequency bands are used for Free-space level measurement: the C-band (6 GHz), the X-band (10 GHz), the K-band (26 GHz) and lately the W-band (80 GHz) and these are either based on the Pulse principle or Frequency Modulated Continuous Wave (FMCW) technology. Recently there has been a lot of hype concerning high frequency 80 GHz radar transmitters, where some manufactures claim: the higher the frequency the better the performance. This is not necessarily true. Instead, accuracy is dependent upon a combination of frequency, beam angle, antenna configuration, but more importantly on installation and dielectric constant (DC) of the product itself.

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