Publisher DOI: 10.1109/LMWC.2021.3084338
Title: A Digital Correction Method for Increased Dynamic Range in Interferometric Six-Port Radars
Language: English
Authors: Krause, Sven 
Michler, Fabian 
Kölpin, Alexander  
Rudolph, M. 
Heinrich, Wolfgang 
Keywords: Calibration;calibration technique;Detectors;digital correction;displacement measurement;Harmonic analysis;Radio frequency;RF signals;Schottky diodes;Six-port radar;Voltage measurement
Issue Date: 2021
Source: IEEE Microwave and Wireless Components Letters (in Press): (2021)
Journal: IEEE microwave and wireless components letters 
Abstract (english): 
In this paper, we demonstrate a digital correction method for extending the dynamic range of a six-port radar system based on detector diodes. An individual diode gain is considered to depend on output voltage, which can be approximated as a linear function in order to extrapolate the diode’s square-law response to higher input powers. The individual diode coefficients are extracted during an initial calibration measurement utilizing the interferometric working principle. A six-port junction in combination with power detectors based on Si Schottky diodes operating at 24 GHz has been employed to validate the concept. Reduction of the 3rd- and 5th- order harmonic of up to 35 dB and 22 dB, respectively, have been achieved at the highest input power of 8 dBm. The correction was applied for a wide range of operating conditions. As a result, the increase of phase error under large-signal and high power operation is effectively compensated and remains as low as under small-signal conditions. Thus, phase accuracy is maintained beyond the classical dynamic range of detector diodes in six-port applications so far.
ISSN: 1531-1309
Institute: Hochfrequenztechnik E-3 
Document Type: Article
Appears in Collections:Publications without fulltext

Show full item record

Page view(s)

checked on Jun 19, 2021

Google ScholarTM


Add Files to Item

Note about this record

Cite this record


Items in TORE are protected by copyright, with all rights reserved, unless otherwise indicated.