EBG Antenna for GPR Colocated With a Metal Detector for Landmine Detection

Abstract-The removal of ground surface influence from ground penetrating radar (GPR) signals in shallowly-buried objects is of great importance. The ultra-wideband (UWB) radar is a solution which uses short pulse to distinguish ground surface from shallowly-buried objects. In this paper, a novel method optimizes bandwidth based on designing a Gaussian signal. Experimental results confirm the proposed method efficiency.

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“…The lowest frequency depends on antennas gain [5,6]. In our experiment, the gain of antenna is constant after 2 GHz.…”

Section: Lowest Frequencymentioning

confidence: 58%

Optimized Uwb Signal to Shallow Buried Object Imaging

Gharamohammadi¹,

Norouzi²,

Aghaeinia³

2018

PIER Letters

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“…In Table 2, a comparison is shown between our system and other similar works found in the literature. It can be seen that our system has the smallest volume of them all, being only surpassed in terms of number of frequency bands by the system presented in [19], which is roughly 10 times bigger than ours.…”

Section: Antenna Reflection Coefficientmentioning

confidence: 56%

“…To be combined with the proposed EBG and EBG-CS structures, the antenna was designed considering that it would be mounted on top of the EBG superstrate. A printed half-wave dipole antenna was used [17][18][19][20][21], resonating around 4.3 GHz. The idea was to have the antenna operating at two new frequencies when being placed close to the EBG-CS structures.…”

Section: Antenna Designmentioning

confidence: 99%

Enhanced Low Profile, Dual-Band Antenna via Novel Electromagnetic Band Gap Structure

Ghabzouri¹,

Salhi²,

Anacleto³

et al. 2017

PIER C

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Abstract-This paper presents a dual-band, low profile antenna with reduced specific absorption rate (SAR) for mobile handset applications. Here, dual-band operation is obtained by combining a printed dipole antenna (initially resonating at 4.3 GHz) with EBG mushroom-like structures loaded with circular slots (CS). The final structure operates at 3.44 GHz (additional band required for LTE Advanced LTE-A) and 4.5 GHz (for Smartphone WLAN applications) with improved bandwidth and reflection coefficient (350-MHz around 3.5 GHz with −26 dB, and 330 MHz around 4.5 GHz with −30 dB). Finally, a dosimetry study of the proposed printed dual-band dipole antenna is presented and verifies an SAR reduction from 9 W/Kg to 1.41 W/Kg compared to the same antenna without any loading structure, and from 3.98 W/Kg to 1.41 W/Kg compared to a standard EBG mushroom-like structure.

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“…The equivalent circuit of an antenna set, one transmitting and two receiving antennas, is shown as in Figure 2. The instantaneous output voltage V 10 , in no load condition, can be expressed as the difference of mutual inductance, 1 − 2 , between transmitting and respective receiving antenna as shown in (1), and is also proportional to exciting frequency as shown in (3). In this model, the distance between transmitting antenna and receiving antenna is closer than the distance to passing object containing metal piece; thus antenna inductances are larger than mutual inductance, 11 and 12 .…”

Section: Two-antenna Modelmentioning

confidence: 99%

“…The metal detection sensor is now widely used in not only food processing industry but also defense industry [1,2] to detect metal pieces in surrounding object, and considerable efforts have been devoted to enhance sensitivity and selectivity. Foreign materials are not only metal but also wood, ceramics [3], and germs [4], which are not detectable by using metal sensor.…”

Section: Introductionmentioning

confidence: 99%

Two-Channel Metal Detector Using Two Perpendicular Antennas

Choi

2014

Journal of Sensors

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Two-channel metal detector, having two sets of perpendicularly oriented sensor antennas, is proposed to expand detectable size, ranging from mm through cm scale, of metal sensor, while conventional metal sensor is dedicated for detection only in mm or cm scale. The characteristics of the two metal detection sensor channels were investigated, respectively, and the interference effect, while in simultaneous operation, between two sensor channels was discussed. Metal detection channel, having sensitivity in mm scale, showed detectable sensitivity to moving ferrous sphere, with diameter down to 0.7 mm, at 50 kHz exciting frequency and enhanced sensitivity distribution. And metal detection channel having sensitivity in cm scale showed more uniform sensitivity distribution with the flexibility for future modular construction. The effect of interference, while in simultaneous operation of two sensors, resulted in reduced output response, but still within usable detection range. Thus it was feasible to operate two sensors, having different sensitivity range, simultaneously and to extend detection range from mm to cm scale, within practically acceptable interference.

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EBG Antenna for GPR Colocated With a Metal Detector for Landmine Detection

Cited by 9 publications

References 9 publications

Optimized Uwb Signal to Shallow Buried Object Imaging

Optimized Uwb Signal to Shallow Buried Object Imaging

Enhanced Low Profile, Dual-Band Antenna via Novel Electromagnetic Band Gap Structure

Two-Channel Metal Detector Using Two Perpendicular Antennas

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