Cancellation of interference for emission measurement in open area test site

Awan, Fahim Gohar; Kiran, Asima

doi:10.1016/j.measurement.2017.07.037

Cited by 6 publications

(5 citation statements)

References 28 publications

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“…This leads to a parallel processing of the resulting components, which increases the overall efficiency of the signal processing structure. Similar approaches can be found on [7,8]. Finally, Mikulas Bittera [9] describes analytical expressions for the uncertainties inherent to the antenna calibration problem in OATS as well as techniques to minimize them.…”

Section: Introductionmentioning

confidence: 92%

Improving antenna gain estimations in non-ideal test sites with auto-tunable filters

et al. 2020

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Estimating the gain of an antenna prototype is an important step during both design and validation phases. Nevertheless, many small technology companies and universities are not provided with adequate infrastructure to run this type of test. In this paper, we propose a computational tool to deal with undesirable contributions coming from non-ideal test conditions over electromagnetic measurements. It is based on auto-tunable filters and therefore it allows a lab technician to run the test without a major knowledge on signal processing. After a series of evaluations based on lab measurements, the proposed tool gives results as good as those provided by two other approaches but with a reduction of the total number of experimental runs. Furthermore, it is more efficient than the traditional time gating approach for low signal-to-noise ratio environments. Finally, a validation with different antennas and test sites confirmes its robustness.

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Section: Introductionmentioning

confidence: 92%

Improving antenna gain estimations in non-ideal test sites with auto-tunable filters

et al. 2020

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“…The OATS quality is determined by several factors, such as the construction of antenna elements, power supply, electrical properties, and sources of environmental scattering [19]. However, in OATS technique, interference frequently occurs from other sources [20]. To get a valid result, the interference must be eliminated or cancelled [20].…”

Section: Oats Is a Measurement Technique Of Em Emissions In Anmentioning

confidence: 99%

“…However, in OATS technique, interference frequently occurs from other sources [20]. To get a valid result, the interference must be eliminated or cancelled [20]. The proposed technique is a multichannel signal from an interference source and the equipment under test (EUT) being captured simultaneously on different antenna ports.…”

Section: Oats Is a Measurement Technique Of Em Emissions In Anmentioning

confidence: 99%

“…Table 2 presents several studies and applications of OATS. Measurements of shielding effectiveness of connectors and coaxial cable [22] Testing for high intensity radiated field of unmanned aerial vehicle's [23] EM Emission from handheld devices [20] Cancellation of interference for emission measurement in OATS [24] Measurements of high level radiated susceptibility at the OATS [25] Modeling and correlation of radiated emissions generated at an OATS [26] Scattering characteristic analysis of OATS ground plane [27] Conversion of radiated emissions using genetic algorithm from anechoic chamber to OATS [17] Influences of table material at OATS on the strength of radiated field measurement [28] The diode loaded standard antenna as receiving in OATS [29] Ultra-broadband calculable dipole antennas verification & applications [30] Measuring radiated EMI using a statistical based model in OATS environment [31] Technique to compute OATS uncertainty [32] Model of GTD for OATS with a finite metallic plane…”

Section: Oats Is a Measurement Technique Of Em Emissions In Anmentioning

confidence: 99%

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A review of measurement of electromagnetic emission in electronic product: Techniques and challenges

Yuwono

Baharuddin

Misran

et al. 2022

CST

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Nowadays, electronic products are being used extensively in many fields and applications. The dense population of electronic devices in human life has become a challenge for microwave engineers to ensure that their products can meet the Electromagnetic Compatibility (EMC) standards. Complex electronic products with smaller sizes and denser components will be a challenge for compliance with EMC standards. In addition, the occurrence of non-stationary emission at certain operating modes becomes a challenge for analysis. Error in analyzing EM emissions will make the products unable to meet the requirements of EMC standards; hence, they will be prohibited to be marketed. Currently, there are two methods of emission analysis, i.e. by measurement and modeling or computation. There are some problems, however, in the analysis of EM emissions regarding the area of test, complexity, DUT positioning error, installation cost, and time consumption. In this paper, the analysis techniques for EM emissions including Open Area Test Site (OATS), Anechoic chamber, Transverse Electromagnetics TEM Cell, Compact Antenna Test Range (CATR) and near field scanning are reviewed comprehensively. This survey covered EMC standards, principles of EM emission measurement techniques, advantages and disadvantages of EM emission measurement techniques, studies and applications of each technique, recommendations for which technique to be used, and challenges for future research in EM emission measurement. The final section of this paper discusses the challenges for near-field measurements related to the non-stationary emissions phenomenon. This papers also presents the challenges of how to detect and characterize them.

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“…The antenna measurement cost can be substantially reduced by neglecting the use of specialized facilities in favor of installing the test equipment in the non-anechoic (NA) sites, e.g., offices, hallways, or courtyards [9]- [13]. Unfortunately, multi-path interferences and a random noise from the external sources of electromagnetic (EM) radiation make the responses obtained in such conditions useless for drawing conclusions on the antenna far-field performance [9]. The problem can be addressed through appropriate post-processing.…”

Section: Introductionmentioning

confidence: 99%

Automatic Correction of Nonanechoic Antenna Measurements Using Complex Morlet Wavelets

Bekasiewicz,

Waladi

2024

Antennas Wirel. Propag. Lett.

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Real-world performance of antennas is normally tested in anechoic chambers (ACs). Alternatively, experimental validation can be performed in non-anechoic environments and refined in the course of post-processing. Unfortunately, the existing methods are difficult to setup and prone to failure. In this letter, a wavelet-based framework for correction of non-anechoic antenna measurements has been proposed. The method involves automatic centering and adjusting of the wavelet w.r.t. a fraction of the signal that corresponds to line-of-sight transmission within the system under test. Performance of the method has been verified a using two compact antennas and a total of 15 experiments. Benchmarks against the state-of-the-art approaches have also been performed.

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Cancellation of interference for emission measurement in open area test site

Cited by 6 publications

References 28 publications

Improving antenna gain estimations in non-ideal test sites with auto-tunable filters

Improving antenna gain estimations in non-ideal test sites with auto-tunable filters

A review of measurement of electromagnetic emission in electronic product: Techniques and challenges

Automatic Correction of Nonanechoic Antenna Measurements Using Complex Morlet Wavelets

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