Variable Termination Unit for Noise-Parameter Measurement. - Dazhen Gu; David K. Walker; James Randa (IEEE Trans. Instrum. Meas., 2009)

Reflectivity studies of passive microwave calibration targets and absorptive materials. - Dazhen Gu; Amanda E. Cox; Derek Houtz; David K. Walker; James Randa; Robert L. Billinger (IGARSS, 2010)

Comparison of microwave black-body target radiometric measurements. - David K. Walker; Dazhen Gu; Katherine MacReynolds; Randy Direen; James Randa; Amanda E. Cox; Derek Houtz; Robert L. Billinger (IGARSS, 2010)

Extraction of reflectivity from microwave blackbody target with free-space measurements. - Dazhen Gu; Derek Houtz; James Randa; David K. Walker (IGARSS, 2011)

Reflectivity Study of Microwave Blackbody Target. - Dazhen Gu; Derek Houtz; James Randa; David K. Walker (IEEE Trans. Geosci. Remote. Sens., 2011)

Verification of Noise-Parameter Measurements and Uncertainties. - James Randa; Joel Dunsmore; Dazhen Gu; Ken Wong; David K. Walker; Roger D. Pollard (IEEE Trans. Instrum. Meas., 2011)

Realization of a standard radiometer for microwave brightness-temperature measurements traceable to fundamental noise standards. - Dazhen Gu; Derek Houtz; James Randa; David K. Walker (IGARSS, 2012)

An investigation of antenna characterization techniques in microwave remote sensing calibration. - Derek Houtz; Dazhen Gu; David K. Walker; James Randa (IGARSS, 2012)

Extraction of Illumination Efficiency by Solely Radiometric Measurements for Improved Brightness-Temperature Characterization of Microwave Blackbody Target. - Dazhen Gu; Derek Houtz; James Randa; David K. Walker (IEEE Trans. Geosci. Remote. Sens., 2012)

A Geometric Error Model for Misaligned Calibration Target in Passive Microwave Remote-Sensing Systems. - Dazhen Gu; James Randa; David K. Walker (IEEE Geosci. Remote. Sens. Lett., 2013)

Simulations to characterize a passive microwave blackbody design. - Derek A. Houtz; David K. Walker; Dazhen Gu (IGARSS, 2015)

Electromagnetic Design and Performance of a Conical Microwave Blackbody Target for Radiometer Calibration. - Derek A. Houtz; William J. Emery; Dazhen Gu; Karl Jacob; Axel Murk; David K. Walker; Richard J. Wylde (IEEE Trans. Geosci. Remote. Sens., 2017)

A Measurement Technique for Infrared Emissivity of Epoxy-Based Microwave Absorbing Materials. - Derek A. Houtz; Dazhen Gu (IEEE Geosci. Remote. Sens. Lett., 2018)

Brightness Temperature Calculation and Uncertainty Propagation for Conical Microwave Blackbody Targets. - Derek A. Houtz; William J. Emery; Dazhen Gu; David K. Walker (IEEE Trans. Geosci. Remote. Sens., 2018)

Noise Synthesis Technique in Time Domain for Metrology Application. - Dazhen Gu; Jeffrey E. Jenkins (IEEE Trans. Instrum. Meas., 2019)

NIST-Traceable Microwave Power Measurement in a Waveguide Calorimeter With Correlated Uncertainties. - Dazhen Gu; Xifeng Lu; Benjamin F. Jamroz; Dylan F. Williams; Xiaohai Cui; Aric W. Sanders (IEEE Trans. Instrum. Meas., 2019)

Planar Metamaterial Absorbers for Calibration of Microwave Radiometers for Atmospheric Remote Sensing. - Omar Khatib; Dazhen Gu; Jonah Smith; William R. Deal; Willie J. Padilla; Steven C. Reising (IGARSS, 2022)

Characterization of Microwave Blackbody with Monostatic Measurement. - Dazhen Gu; Jonah Smith; Adam Whitney; Omar Khatib; Natalie Rozman; Amanda Gregg; Willie Padilla; William R. Deal; Steven C. Reising (IGARSS, 2024)

On Digital Signal Processing of Time Series for Spectrum Estimation. - Dazhen Gu; Jacob D. Rezac; Xifeng Lu; Daniel G. Kuester (IEEE Trans. Instrum. Meas., 2024)