A Digital Correction Method for Increased Dynamic Range in Interferometric Six-Port Radars

Krause S, Michler F, Kölpin A, Rudolph M, Heinrich W (2021)

Publication Language: English

Publication Type: Journal article

Publication year: 2021

Journal

IEEE Microwave and Wireless Components Letters Institute of Electrical and Electronics Engineers (IEEE)

Book Volume: 31

Pages Range: 997-1000

Journal Issue: 8

DOI: 10.1109/LMWC.2021.3084338

Abstract

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 24GHz has been employed to validate the concept. Reduction of the 3rd-and 5th-order harmonic of up to 35dB and 22dB, respectively, have been achieved at the highest input power of 8dBm. 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.

Authors with CRIS profile

Fabian Michler Lehrstuhl für Technische Elektronik (LTE) Alexander Kölpin

Involved external institutions

Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik (FBH) DE Germany (DE) Brandenburgische Technische Universität Cottbus-Senftenberg (BTU) DE Germany (DE) Technische Universität Hamburg-Harburg (TUHH) DE Germany (DE)

How to cite

APA:

Krause, S., Michler, F., Kölpin, A., Rudolph, M., & Heinrich, W. (2021). A Digital Correction Method for Increased Dynamic Range in Interferometric Six-Port Radars. IEEE Microwave and Wireless Components Letters, 31(8), 997-1000. https://doi.org/10.1109/LMWC.2021.3084338

MLA:

Krause, Sascha, et al. "A Digital Correction Method for Increased Dynamic Range in Interferometric Six-Port Radars." IEEE Microwave and Wireless Components Letters 31.8 (2021): 997-1000.

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