Dipole Antenna With 18×5 Square Electromagnetic Band Gap for Applications Used in Monitoring Children Trapped in Cars

Naktong, Watcharaphon; Wattikornsirikul, Natchayathorn

doi:10.2528/pierm22053003

Cited by 2 publications

(3 citation statements)

References 27 publications

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“…The addition of an EGB can optimize the gain of the cantenna structure, by making the directional wave propagation in front of the antenna more distant. The addition of an EGB can enhance the gain efficiency of the cantenna structure, making the wave radiate further in front of the antenna, which is consistent with theory [33][34][35][36]. The same frequency band is still used that is 2.60 GHz from the foregoing as displayed in Table 2.…”

Section: Antenna Structure Designsupporting

confidence: 77%

“…Based on this problem, Woodpile-shaped EBG with Mu-Epsilon Near Zero properties was designed. This type of EBG allowed the wave to propagate through it to increase the gain [33][34][35]. The antenna was modeled on a polyester mylar film with a thickness of the base material (h 2 ) = 0.3 cm and a dielectric constant (ε r ) = 3.2.…”

Section: Antenna Structure Designmentioning

confidence: 99%

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Cantenna Adjustment with 1x6 Woodpile Shaped EBG for Application in Goat Manure Moisture Content and Bulk Density Monitoring

Naktong¹,

Prapakarn²,

Prapakarn³

et al. 2022

PIER C

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This study aimed to investigate the structural design of a cantenna with Woodpile shaped electromagnetic band gap (EBG) for gain enhancement and to increase the efficiency of signal transmission for measuring the moisture content and the bulk density of goat manure, which can help farmers reduce the cost of buying chemical fertilizers. From the test of operating frequency ranges from 2 to 3 GHz, it was found that the frequency band that responds to humidity the best is 2.60 GHz, increasing the efficiency of the gain with the 6 × 6 cm 2 Woodpile shaped EBG. It was arranged in transverse electric (TE) and placed parallel to the end of the cantenna. This allows the gain to be increased to 9.31 dBi, in which the cantenna structure without EBG has the gain of 7.32 dBi. When the cantenna is used to determine the moisture content (MC) and bulk density, the transmission distance between the cantenna Tx/Rx is 3 cm with an average power rating of 0.0001-0.5 mW. This cantenna can measure humidity in the unit of wet basis (wb.) as low as 0.14%wb., at an average power of 0.5 mW.

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Section: Antenna Structure Designsupporting

confidence: 77%

Section: Antenna Structure Designmentioning

confidence: 99%

Cantenna Adjustment with 1x6 Woodpile Shaped EBG for Application in Goat Manure Moisture Content and Bulk Density Monitoring

Naktong¹,

Prapakarn²,

Prapakarn³

et al. 2022

PIER C

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“…It helps respond to frequency adjusting as desired, including increasing the gain rate even more. To be able to find appropriate values for differences in wave transmission through other types of materials as desired from research [40][41][42][43][44][45][46][47].…”

Section: Discussionmentioning

confidence: 99%

An Adjusted Waveguide Antenna with A Woodpile-Shaped EBG for Eucalyptus Wood Moisture Content Measurement

Naktong,

Puangnak,

Phanthuna

et al. 2024

Trends Sci

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A rectangular waveguide antenna was tested for eucalyptus wood moisture content (MC) measurement before being used. To improve the moisture content measurement of the rectangular waveguide antenna, a woodpile-shaped Electromagnetic Band Gap (EBG) was installed by Transverse Electric (TE) arrangement. This antenna is responsible for receiving and transmitting signals which are converted from electrical energy into radio frequency energy transmitted through the air. In this research, we take advantage of the wave propagation of antennas in the air and use them to propagate waves through wood materials. To compare signal transmission power to determine moisture content in wood and the benefit of the EBG is that it acts like a convex lens to increase the strength of the waves so that they can penetrate the wood more efficiently. The results showed that woodpile-shaped EBG could increase the efficiency of receiving and transmitting signals, reduce working hours for farmers and reduce costs by about 90 %. When this antenna was tested and actually used, it was found that the frequency band that responded best to the moisture content value was 2.20 GHz. This antenna was built with an aluminum material of size 9×4×15 cm3 and 2×6 units woodpile EBG on a 9.54×4 cm2 Polyester Mylar base plate. There was a gain of 7.81 dBi from the original structure, or by 20 %. At a radius of 4 cm, the values of moisture content ranged from –9.46 to –42.19 dBm. At a radius of 6 cm, the values were –9.41 to –42.89 dBm. At a radius of 8 cm, the values ranged from –9.39 to –43.01 dBm, respectively. All 3 values were found to be efficient. The size was not less than 84 % compared to the general standard meter. HIGHLIGHTS A rectangular waveguide antenna was tested for eucalyptus wood moisture content (MC) measurement before being used. To improve the moisture content measurement of the rectangular waveguide antenna, a woodpile-shaped Electromagnetic Band Gap (EBG) was installed by Transverse Electric (TE) arrangement. This antenna is responsible for receiving and transmitting signals which are converted from electrical energy into radio frequency energy transmitted through the air. In this research, we take advantage of the wave propagation of antennas in the air and use them to propagate waves through wood materials. To compare signal transmission power to determine moisture content in wood and the benefit of the EBG is that it acts like a convex lens to increase the strength of the waves so that they can penetrate the wood more efficiently. The results showed that woodpile-shaped EBG could increase the efficiency of receiving and transmitting signals, reduce working hours for farmers and reduce costs by about 90 %. When this antenna was tested and actually used, it was found that the frequency band that responded best to the moisture content value was 2.20 GHz. This antenna was built with an aluminum material of size 9×4×15 cm3 and 2×6 units woodpile EBG on a 9.54×4 cm2 Polyester Mylar base plate. There was a gain of 7.81 dBi from the original structure, or by 20 %. At a radius of 4 cm, the values of moisture content ranged from –9.46 to –42.19 dBm. At a radius of 6 cm, the values were –9.41 to –42.89 dBm. At a radius of 8 cm, the values ranged from –9.39 to –43.01 dBm, respectively. All 3 values were found to be efficient. The size was not less than 84 % compared to the general standard meter. GRAPHICAL ABSTRACT

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Dipole Antenna With 18×5 Square Electromagnetic Band Gap for Applications Used in Monitoring Children Trapped in Cars

Cited by 2 publications

References 27 publications

Cantenna Adjustment with 1x6 Woodpile Shaped EBG for Application in Goat Manure Moisture Content and Bulk Density Monitoring

Cantenna Adjustment with 1x6 Woodpile Shaped EBG for Application in Goat Manure Moisture Content and Bulk Density Monitoring

An Adjusted Waveguide Antenna with A Woodpile-Shaped EBG for Eucalyptus Wood Moisture Content Measurement

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