Radiation Pattern Retrieval in Non-Anechoic Chambers Using the Matrix Pencil Algorithm

León, Germán; Loredo, S.; Zapatero, S.; Las-Heras, Fernando

doi:10.2528/pierl09051204

Cited by 21 publications

(15 citation statements)

References 7 publications

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“…A proper model of RF microwave absorber must be developed based on various parameters such as the absorber reflection loss, the magnitude and phase, for various angles of incidence, and for parallel and perpendicular polarizations [4,12,20,21]. The reflection loss, R, can be expressed as the absorbing performance of the material and is a function of the complex permittivity, permeability of the material, and the frequency of the electromagnetic wave [22].…”

Section: Introductionmentioning

confidence: 99%

Parametric Study of Pyramidal Microwave Absorber Using Rice Husk

Nornikman¹,

Malek²,

Soh³

et al. 2010

PIER

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Section: Introductionmentioning

confidence: 99%

Parametric Study of Pyramidal Microwave Absorber Using Rice Husk

Nornikman¹,

Malek²,

Soh³

et al. 2010

PIER

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“…We can either use (11) or (14) to model the measurement scenario in the presence of echoes. Which of the two equations will be more useful will depend on the problem at hand.…”

Section: Reconstruction For Measurements With Echoesmentioning

confidence: 99%

“…Sometimes, it is possible to model the echo influences directly, if for example exact knowledge of geometry and material composition of a scattering object is given and the echo influence can directly be included in the linear model (9) [36]. More often, however, neither the echolocation nor the echo response for incident fields is known with sufficient accuracy for the echo objects, such that a direct echo modelling according to (11) or (14) is not feasible.…”

Section: Reconstruction For Measurements With Echoesmentioning

confidence: 99%

“…The bandwidth limitations can possibly be circumvented if the time domain signal is calculated by non-linear methods instead of an inverse Fourier transform. Noteworthy in this respect are the matrix pencil method [10,11] and sparse time domain signal representations [12,13], which both work under the assumption that the time domain signal can be expressed by a small number of impulses. This assumption is only correct for a relatively small number of scattering centres and not well suited for the intended highly reflective measurement scenario.…”

Section: Introductionmentioning

confidence: 99%

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Equivalent source and pattern reconstruction from oversampled measurements in highly‐reflective environments

Knapp

Kornprobst

Eibert

2019

IET Microwaves, Antennas & Propagation

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Measurement errors due to echoes are a major challenge for accurate antenna pattern measurements. In particular in highly‐reflective measurement environments, the echo contribution can easily have more influence on the measurement signal than the desired line‐of‐sight contribution between the antenna under test and the measurement probe. A large number of redundant measurement samples at different locations and for different frequencies is used together with appropriate post‐processing techniques to mitigate the echo influences on the measurements. The frequency diversity is used for time gating. A virtual array, less sensitive to the undesired echo fields, is formed using probe diversity. In this work, the common time gating technique is enhanced and the impact of different probe configurations for creating a virtual array is investigated. The utilised time gating method extends the measured frequency domain signal to mitigate the Gibbs phenomenon. Processing measurements in a quasi‐metallic room, the signal contributions at the edges of the measured bandwidth do not suffer from distortions with the enhanced time gating method. Combining up to 115 probes to form a virtual array, it is found that the results improve with an increasing number of probes as long as the probes are distant enough from the walls.

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“…There are many shapes of microwave absorber that have been used in research, including pyramids, wedges, convoluted shapes, metamaterial bases, and oblique [34][35][36][37][38][39][40][41][42][43][44][45]. The recent research by Nornikman et al showed that rice husks can be an alternative natural material for designing a pyramidal microwave absorber.…”

Section: Development Of Pyramidal Microwave Absorbermentioning

confidence: 99%

Rubber Tire Dust-Rice Husk Pyramidal Microwave Absorber

Malek

Cheng

Nadiah

et al. 2011

PIER

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Abstract-Rubber tire dust-rice husk is an innovation in improving the design of pyramidal microwave absorbers to be used in radio frequency (RF) anechoic chambers. An RF anechoic chamber is a shielded room covered with absorbers to eliminate unwanted reflection signals. To design the pyramidal microwave absorber, rice husk will be added to rubber tire dust since the study shows that both have high percentages of carbon. This innovative material combination will be investigated to determine the best reflectivity or reflection loss performance of pyramidal microwave absorbers. Carbon is the most important element that must be in the absorber in order to help the absorption of unwanted microwave signals. In the commercial

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Radiation Pattern Retrieval in Non-Anechoic Chambers Using the Matrix Pencil Algorithm

Cited by 21 publications

References 7 publications

Parametric Study of Pyramidal Microwave Absorber Using Rice Husk

Parametric Study of Pyramidal Microwave Absorber Using Rice Husk

Equivalent source and pattern reconstruction from oversampled measurements in highly‐reflective environments

Rubber Tire Dust-Rice Husk Pyramidal Microwave Absorber

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