Next Article in Journal
Automated Purification of Radiometals Produced by Liquid Targets
Previous Article in Journal
First Steps at the Cyclotron of Orléans in the Radiochemistry of Radiometals: 52Mn and 165Er
Article Menu

Export Article

Open AccessArticle
Instruments 2018, 2(3), 16; https://doi.org/10.3390/instruments2030016

Hardware Design of a High Dynamic Range Radio Frequency (RF) Harmonic Measurement System

1
School of Electrical Engineering and Computer Science, The Pennsylvania State University, University Park, PA 16802, USA
2
U.S. Army Research Laboratory, Sensors Directorate, Adelphi, MD 20783, USA
3
The Citadel, Department of Electrical & Computer Engineering, Charleston, SC 29409, USA
*
Author to whom correspondence should be addressed.
Received: 15 July 2018 / Revised: 15 August 2018 / Accepted: 17 August 2018 / Published: 19 August 2018
Full-Text   |   PDF [5272 KB, uploaded 20 August 2018]   |  

Abstract

Radio frequency (RF) circuit elements that are traditionally considered to be linear frequently exhibit nonlinear properties that affect the intended operation of many other RF systems. Devices such as RF connectors, antennas, attenuators, resistors, and dissimilar metal junctions generate nonlinear distortion that degrades primary RF system performance. The communications industry is greatly affected by these unintended and unexpected nonlinear distortions. The high transmit power and tight channel spacing of the communication channel makes communications very susceptible to nonlinear distortion. To minimize nonlinear distortion in RF systems, specialized circuits are required to measure the low level nonlinear distortions created from traditionally linear devices, i.e., connectors, cables, antennas, etc. Measuring the low-level nonlinear distortion is a difficult problem. The measurement system requires the use of high power probe signals and the capability to measure very weak nonlinear distortions. Measuring the weak nonlinear distortion becomes increasingly difficult in the presence of higher power probe signals, as the high power probe signal generates distortion products in the measurement system. This paper describes a circuit design architecture that achieves 175 dB of dynamic range which can be used to measure low level harmonic distortion from various passive RF circuit elements. View Full-Text
Keywords: high dynamic range measurements; harmonic measurement system; nonlinear distortion; harmonic radar; passive RF components high dynamic range measurements; harmonic measurement system; nonlinear distortion; harmonic radar; passive RF components
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Narayanan, R.M.; Gallagher, K.A.; Mazzaro, G.J.; Martone, A.F.; Sherbondy, K.D. Hardware Design of a High Dynamic Range Radio Frequency (RF) Harmonic Measurement System. Instruments 2018, 2, 16.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Instruments EISSN 2410-390X Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top