Echo identification and cancellation techniques for antenna measurement in non-anechoic test sites

Loredo, S.; Pino, Marcos R.; Las-Heras, Fernando; Sarkar, Tapan K.

doi:10.1109/map.2004.1296154

Cited by 76 publications

(61 citation statements)

References 11 publications

(4 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Time-gating techniques can also be employed as an option to remove reflected contributions, as it has been presented in (Young, 1973) and (Burrell, 1973). However, the complexity of the pieces of equipment is lower when using frequency-domain measurements as proposed in (Loredo, 2004).…”

Section: Reflection Suppression Methodsmentioning

confidence: 99%

Overview of Novel Post-Processing Techniques to Reduce Uncertainty in Antenna Measurements

Silva¹,

Muñoz‐Acevedo²,

Cano-Fácila³

et al. 2012

Advanced Topics in Measurements

View full text Add to dashboard Cite

Section: Reflection Suppression Methodsmentioning

confidence: 99%

Overview of Novel Post-Processing Techniques to Reduce Uncertainty in Antenna Measurements

Silva¹,

Muñoz‐Acevedo²,

Cano-Fácila³

et al. 2012

Advanced Topics in Measurements

View full text Add to dashboard Cite

“…In the time domain, the direct contribution is detected, eliminating the undesired echoes. This method was studied by [Loredo et al, 2003] and compared with the first one in [Loredo et al, 2004]. The main problem of both techniques is the necessity to measure in a frequency band that produces an important increase of the measured time.…”

Section: Diagnostic Techniques For Cancelling the Effect Of Reflectionsmentioning

confidence: 99%

Error Analysis and Simulator in Cylindrical Near-Field Antenna Measurement Systems

Sara¹,

Silva²,

Fernando³

et al. 2010

Advances in Measurement Systems

View full text Add to dashboard Cite

Large antennas need special measurement systems because of their considerable dimensions. Typically, cylindrical near-field systems are appropriate measurement systems for omnidirectional antennas due to the characteristics of their radiation patterns. Furthermore, these systems are also appropriate for sizeable RADAR antennas, since they can be measured on their azimuthal positioner and the probe can be easily translated through a vertical linear slide. Thus, mechanical aspects of measurement systems are rather important since errors in the mechanical set-up can directly affect far-field radiation patterns. This chapter presents an error estimation tool to analyze the most important errors for large L-band RADAR antennas in an outdoor cylindrical acquisition system and the effect of these errors in the calculated far-field radiation pattern. This analysis can be very convenient to evaluate the error budget of the Antenna Under Test (AUT). The simulator computes the far-field with an array of vertical dipoles over a ground plane and compares an ideal infinite far-field with the electric field obtained using the cylindrical near-to-far-field (NF-FF) transformation algorithm. The influence of the inaccuracies on the final results is evaluated by introducing random and systematic sources of errors and then, analyzing the variations produced in the principal far-field patterns, antenna parameters and in the side lobe levels (SLL). Finally, this simulator can be employed to analyze the errors for L-band RADAR antennas. One of the objectives of this investigation is thus to analyse how mechanical and electrical inaccuracies could affect the results of a cylindrical antenna measurement system, in order to minimize them as much as possible. This is highly important not only to meet the specifications, but also to reach high accurate results. There are several error sources studies for near-field patterns: the most complete are the ones developed by Joy and Newell in [Joy,

show abstract

“…In the initial approaches [1], [2], the measurement was directly performed in the time-domain. However, the complexity of the equipment is lower using frequency-domain measurements as it is proposed in [3]. From such measurements, the time response is immediately calculated applying an inverse Fourier transform (IFT).…”

Section: Introductionmentioning

confidence: 99%

Comparison of echo reduction techniques for one-single cut antenna measurements

Morales

Saccardi

Castañer

et al. 2016

2016 10th European Conference on Antennas and Propagation (EuCAP)

View full text Add to dashboard Cite

Abstract-This paper presents a comparison between two different echo reduction techniques applied to one-single cut antenna measurements. These techniques are based on modal filtering and time filtering. The first technique uses a postprocessing of the far field one-single cut so as to obtain a modal expansion of cylindrical modes and to cancel the effect of spurious signals. The second one is based on filtering echoes out in time domain by applying a Fourier Transform to get a signal in which some spurious contributions can be filtered out. Such techniques are applied on the single cut measurements of a wideband horn (MVI SH2000) performed in a semi-anechoic chamber and on the measurements of a dipole (MVI SD1900) performed in a MVG spherical multi-probe system (StarLab). A smart combination of both methods is also applied in order to improve the results of the post processing with respect each different method.

show abstract

Echo identification and cancellation techniques for antenna measurement in non-anechoic test sites

Cited by 76 publications

References 11 publications

Overview of Novel Post-Processing Techniques to Reduce Uncertainty in Antenna Measurements

Overview of Novel Post-Processing Techniques to Reduce Uncertainty in Antenna Measurements

Error Analysis and Simulator in Cylindrical Near-Field Antenna Measurement Systems

Comparison of echo reduction techniques for one-single cut antenna measurements

Contact Info

Product

Resources

About