TY  - JOUR
A1  - Heuermann, Holger
A1  - Harzheim, Thomas
A1  - Cronenbroeck, Tobias
T1  - First SIMO harmonic radar based on the SFCW concept and the HR transfer function
JF  - Remote sensing
N2  - This paper presents a new SIMO radar system based on a harmonic radar (HR) stepped frequency continuous wave (SFCW) architecture. Simple tags that can be electronically individually activated and deactivated via a DC control voltage were developed and combined to form an MO array field. This HR operates in the entire 2.45 GHz ISM band for transmitting the illumination signal and receives at twice the stimulus frequency and bandwidth centered around 4.9 GHz. This paper presents the development, the basic theory of a HR system for the characterization of objects placed into the propagation path in-between the radar and the reflectors (similar to a free-space measurement with a network analyzer) as well as first measurements performed by the system. Further detailed measurement series will be made available later on to other researchers to develop AI and machine learning based signal processing routines or synthetic aperture radar algorithms for imaging, object recognition, and feature extraction. For this purpose, the necessary information is published in this paper. It is explained in detail why this SIMO-HR can be an attractive solution augmenting or replacing existing systems for radar measurements in production technology for material under test measurements and as a simplified MIMO system. The novel HR transfer function, which is a basis for researchers and developers for material characterization or imaging algorithms, is introduced and metrologically verified in a well traceable coaxial setup.
KW  - MUT measurement; scanner
KW  - transponder
KW  - SFCW
KW  - harmonic radar
KW  - nonlinear radar
Y1  - 2021
U6  - http://dx.doi.org/10.3390/rs13245088
SN  - 2072-4292
N1  - This article belongs to the Special Issue "Nonlinear Junction Detection and Harmonic Radar"
VL  - 13
IS  - 24
PB  - MDPI
CY  - Basel
ER  -