Time-gating in antenna and microwave measurements using RDFT

Due to the real-valued character of the measured impulse response, we propose the real discrete Fourier transform (RDFT) as a natural choice for time gating and removing reflections in antenna measurements. A computer program that applies the proposed algorithm was written. The program has a user-friendly graphical user interface (GUI) that allows easy visualization and comparison of time and frequency responses, as well as the proper choice of the time-gating window. The results of the software gating, applied on a measurement set-up consisted of two stacked patch antennas, are compared with the measurements in a reference chamber.

[1]  Thomas F. Eibert,et al.  Time-Domain Spherical Near-Field Antenna Measurement System Employing a Switched Continuous-Wave Hardware Gating Technique , 2010, IEEE Transactions on Instrumentation and Measurement.

[2]  Zwi Altman,et al.  Gabor schemes for analyzing antenna measurements , 2001 .

[3]  Stuart A. Long,et al.  An antenna pattern measurement technique for eliminating the fields scattered from the edges of a finite ground plane , 1990 .

[4]  Joe Wiart,et al.  Correlate measurements at different test sites , 1999 .

[5]  Yeon Choon Chung,et al.  A deterministic correlation of a fully anechoic chamber and oats measurements using a spherical dipole antenna , 2000 .

[6]  W. Burnside,et al.  A comparison of time- and frequency-domain measurement techniques in antenna theory , 1973 .

[7]  G. Burrell,et al.  Antenna radiation pattern measurement using time-to-frequency transformation (TFT) techniques , 1973 .

[8]  Manuel Sierra-Castañer,et al.  New Reflection Suppression Method in Antenna Measurement Systems Based on Diagnostic Techniques , 2011, IEEE Transactions on Antennas and Propagation.

[9]  Martin Dadic,et al.  A technique for elimination of reflected rays from antenna measurements performed in echoic environment , 2007 .

[10]  Juraj Bartolic,et al.  Time domain analysis of mutual coupling measurements between stacked patches , 2003, 17th International Conference on Applied Electromagnetics and Communications, 2003. ICECom 2003..

[11]  Joe Wiart,et al.  On the Use of the Matrix-Pencil Method to Correlate Measurements at Different Test Sites , 1999 .

[12]  Tapan K. Sarkar,et al.  Echo identification and cancellation techniques for antenna measurement in non-anechoic test sites , 2004 .

[13]  Okan K. Ersoy,et al.  Real discrete Fourier transform , 1985, IEEE Trans. Acoust. Speech Signal Process..