Near-field radiation pattern distortion of antenna attached to wall in through-the-wall radar imaging

Cetin, Beyzat Talat; Benedickter, H.; Leuchtmann, P.

doi:10.5194/ars-11-37-2013

Cited by 3 publications

(2 citation statements)

References 15 publications

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“…In addition to that, the imaging of wood not only used for MW region but also for a higher range like THz in [19] and even MWI of wood materials helped to inspect the damage caused by earthquake presented in [20]. The antennas presented in [21, 22] obtained a narrow BW, and their antenna dimensions were larger in comparison with the antenna presented in this paper.…”

Section: Introductionmentioning

confidence: 86%

“…Presently, the system has been proven to be able to quantitatively reconstruct targets whose maximum dimensions are about 0.1 m in green condition and about 0.25 m in dry conditions. In another design, a non-resonant UWB antenna worked based on the quad-ridged horn design [22]. It was dual-polarization and operational in the frequency range of 0.7–10 GHz.…”

Section: Introductionmentioning

confidence: 99%

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Ultra-wideband elliptical patch antenna for microwave imaging of wood

Saeidi

Ismail

Wen

et al. 2019

Int. J. Microw. Wireless Technol.

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This paper presents the design of an elliptical shape ultra-wide band antenna for imaging of wood. The antenna is constructed comprising an elliptical shape of patch loaded by a stub to resonate at lower bands, strip loading at the back, and chamfered ground. Despite having miniaturized dimensions of 20 mm × 20 mm, the proposed antenna shows better results compared to recent studies. The simulation results depict a good ultra-wide bandwidth from 2.68 to 16 GHz, and 18.2–20 GHz. Besides, the proposed antenna has two low-frequency bands at 0.89–0.92 and 1.52–1.62 GHz, maximum gain of 5.48 dB, and maximum directivity of 6.9 dBi. The measurement outcomes are performed in air, plywood, and high-density wood and show a good agreement with the simulated results done using electromagnetic simulator CST. In addition to that, the measurement results of S-parameters, transmitted and received signals show a good agreement with the simulated results. Besides, the measured results illustrate a good isolation and uniform illumination among arrays as well as the received signals' shapes do not change in different environments, but only the amplitude. Hence, the proposed antenna seems to be adequate for microwave imaging of wood.

show abstract

Section: Introductionmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Ultra-wideband elliptical patch antenna for microwave imaging of wood

Saeidi

Ismail

Wen

et al. 2019

Int. J. Microw. Wireless Technol.

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show abstract

Near-field and far-field investigation of miniaturized UWB antenna for imaging of wood

et al. 2019

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This article presents the design of a droplet shape ultra-wide band antenna for imaging of wood. The proposed antenna is designed on PTFE substrate with a dielectric constant of 2.55, loss tangent of 0.001- and 2.4-mm thickness. The antenna is loaded by a stub to resonate at lower band frequency, strip loading at the back, and a chamfered ground to increase the bandwidth. Despite having miniaturized dimensions of 15 mm × 15 mm, it shows better results compared to recent studies. The simulation results depict a good ultra-wide bandwidth from 3.26 GHz to 20 GHz, and 21.5–25 GHz; Besides, the proposed antenna has two bands at 1.25–1.35 GHz and 1.7–1.81 GHz. In addition to that, the antenna achieved a maximum gain of 5.69 dB and directivity of 7.3 dBi. The measurement results of S-parameters transmitted and received signals performed in air, plywood, and high-density wood show a good agreement with the simulated results. In addition, the measured results illustrate a good isolation and uniform illumination among arrays as well as the received signals’ shapes do not change in different environments, but only the amplitude. Hence, the proposed antenna seems to be adequate for microwave imaging of wood.

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